GALAGEN INC
10-K, 1999-03-31
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, DC  20549
                                          
                                  FORM 10-K

(Mark One)

/X/  Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange
     Act of 1934 For the Fiscal Year Ended December 31, 1998
                                          or
/ /  Transition Report Pursuant to Section 13 or 15(d) of the Securities
     Exchange Act of 1934
     For the Transition Period From                 to                 .
                                    ---------------    ----------------

                        Commission file number 0-27976


                                  GalaGen Inc.
- --------------------------------------------------------------------------------

             Delaware                                         41-1719104
- --------------------------------------------------------------------------------
  (State or other jurisdiction of                          (I.R.S. employer
  incorporation or organization)                          identification no.)


         1275 Red Fox Road
      Arden Hills, Minnesota                                  55112-6943
- --------------------------------------------------------------------------------
(Address of principal executive offices)                         (Zip code)


                                 (651) 634-4230
- --------------------------------------------------------------------------------
              (Registrant's telephone number, including area code)

        Securities registered pursuant to Section 12(b) of the Act:  None
        Securities registered pursuant to Section 12(g) of the Act:
                     Common Stock, par value $.01 per share

          Indicate by check mark whether the registrant (1) has filed all
     reports required to be filed by Section 13 or 15(d) of the Securities
     Exchange Act of 1934 during the preceding 12 months (or for such
     shorter period that the registrant was required to file such reports),
     and (2) has been subject to such filing requirements for the past 90
     days.     Yes  /X/       No  / /
     
          Indicate by check mark if disclosure of delinquent filers
     pursuant to Item 405 of Regulation S-K is not contained herein, and
     will not be contained, to the best of registrant's knowledge, in
     definitive proxy or information statements incorporated by reference
     in Part III of this Form 10-K or any amendment to this Form 10-K.   /X/
     
          The aggregate market value of the Common Stock held by
     non-affiliates of the registrant as of March 18, 1999 was $12,847,863
     based on the closing sale price for the Common Stock on that date as
     reported by The Nasdaq Stock Market.  For purposes of determining such
     aggregate market value, all officers, and directors of the registrant
     are considered to be affiliates of the registrant, as well as
     stockholders holding 10% or more of the outstanding Common Stock as
     reflected on Schedules 13D or 13G filed with the registrant.  This
     number is provided only for the purpose of this report on Form 10-K
     and does not represent an admission by either the registrant or any
     such person as to the status of such person.
     
          As of  March 18, 1999 the registrant had 8,948,446 shares of
     Common Stock issued and outstanding.

<PAGE>

                     DOCUMENTS INCORPORATED BY REFERENCE

     Portions of the registrant's definitive Proxy Statement for the annual 
meeting of stockholders to be held on May 12, 1999 and the Annual Report to 
Stockholders for the year ended December 31, 1998 are incorporated by 
reference in Parts II, III and IV of this Annual Report on Form 10-K.  (The 
Compensation Committee Report and the stock performance graph contained in 
the registrant's Proxy Statement are expressly not incorporated by reference 
in this Form 10-K).

                                    PART I

ITEM 1.   BUSINESS

FORWARD-LOOKING STATEMENTS

     The information presented in this Annual Report on Form 10-K under the 
headings "Item 1. Business" and "Item 2. Properties" and incorporated by 
reference under "Item 7. Management's Discussion and Analysis of Financial 
Condition and Results of Operations" contains forward-looking statements 
within the meaning of the safe harbor provisions of Section 21E of the 
Securities Exchange Act of 1934, as amended.  Such statements are subject to 
risks and uncertainties, including those discussed under "Risk Factors" below 
beginning on page 13 of this Annual Report on Form 10-K, that could cause 
actual results to differ materially from those projected.  Because actual 
results may differ, readers are cautioned not to place undue reliance on 
these forward-looking statements.  Certain forward-looking statements are 
indicated below by an asterisk.

INTRODUCTION

     GalaGen Inc. ("GalaGen" or the "Company"), was incorporated in 1992 as a 
successor to a wholly-owned subsidiary of Land O'Lakes, Inc. ("Land O'Lakes") 
that was incorporated in 1987.  GalaGen's mission is to become the leading 
presence in foods, beverages and dietary supplements that help enhance the 
immune system.* To accomplish this mission, the Company is focusing its 
efforts on channels that demand immune-enhancing benefits in certain segments 
of the consumer food and beverage product markets and in certain segments of 
the clinical nutrition products markets, as described below.

     A critical factor for success of the Company is its immune-enhancing 
ingredient which is derived from colostrum, the highly nutritious first milk 
from a dairy cow after its calf is born, which has been branded 
Proventra-TM- Brand Natural Immune Components ("Proventra"). The primary 
immune-enhancing components of Proventra are antibodies, which are proteins 
that enhance the body's immune system to protect against harmful pathogens.  
Secondary immune-enhancing components of Proventra providing further disease 
resistance are proteins, such as lactoferrin, and multiple vitamins and 
minerals.

     The Company believes it is in a position of strategic advantage with its 
ingredient, Proventra*, as follows: 

          ACCESS TO COLOSTRUM.  The Company has agreements with Land O'Lakes
     which provide the Company with access to the Land O'Lakes dairy system. 
     This dairy system has approximately 750,000 cows, from which the Company
     receives its supply of colostrum.  These cows are located primarily in the
     upper Midwest and both the East and West coasts.
          
          PROPRIETARY MANUFACTURING PROCEDURES.  The Company has patented,
     proprietary manufacturing processes that are used to concentrate antibodies
     from the colostrum.  Standard dairy processing techniques destroy the
     activity of most of the antibodies present in milk and colostrum, whereas
     the Company's processing retains the antibody's effectiveness.

          INGREDIENT PATENT PROTECTION.  GalaGen holds exclusive patent licenses
     that prevent potential competitors from combining antibodies with fibers or
     antibodies with active cultures. The licenses 


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<PAGE>

     provide the Company with a high degree of competitive insulation in 
     addition to establishing the Company as an innovator.*

          ABILITY TO ADDRESS MULTIPLE HEALTH CONDITIONS. Using its proprietary
     immunization technologies, including the use of immune system stimulating
     adjuvants, the Company can produce antibodies in the cow that target
     specific pathogens that may cause problems in the human gastrointestinal
     ("GI") tract, including bacteria and their toxins, parasites, fungi and
     viruses. This technology increases by many fold a dairy cow's natural
     production of these targeted antibodies in its colostrum and can be
     utilized to enhance the body's normal response to conditions like yeast
     infections in women, tooth decay and diarrhea.

     The Company is developing, in conjunction with strategic partners, a 
portfolio of proprietary consumer and clinical nutritional food and beverage 
products which will incorporate Proventra.  Additionally, the Company is 
supplying Proventra as an ingredient to food companies for incorporation into 
dietary supplements or other similar products. These products will target 
needs of both consumers and healthcare professionals.

     In December 1998, the Company acquired Nutrition Medical, Inc.'s 
("NMI") developed line of critical care enteral nutrition products and 
formulas. The products were recently introduced by NMI and are being sold to 
the hospital and home healthcare industries. GalaGen purchased substantially 
all of NMI's critical care enteral nutrition products and formulas, all 
related inventory and certain other assets, including the existing customer 
base of over 500 hospitals and home healthcare facilities. The sales and 
marketing group from NMI joined the Company to provide continuity in 
operations and an essential marketing base. The Company is researching ways 
in which to incorporate certain of its immune-enhancing ingredients into 
selected products acquired from NMI to provide additional proprietary 
protection and added benefits that are not currently available in that market 
segment.*  Additionally, Glutasorb-TM-, one of the acquired products, is 
enriched with glutamine, an amino acid important for the support of the 
immune system.

BACKGROUND

IMMUNE-ENHANCING TECHNOLOGY

     Passive immunity consists of using antibodies produced by one individual 
or animal to provide immune protection in another individual. Dairy cows 
provide antibodies to their calves through the colostrum, which is the milk 
produced during the first several days of lactation.  The concentration of 
antibodies in colostrum is many times higher than the normal concentration in 
milk.  Through their natural exposure to the environment, cows have developed 
antibodies that recognize and bind to many human pathogens.  Clinical studies 
performed by GalaGen and others have proven that the antibodies are not 
destroyed by passage through the gastrointestinal tract, and they remain 
functionally active against these undesirable organisms.

FUNCTIONAL FOODS AND NUTRACEUTICALS

     The Company believes that its immune-enhancing technology lends itself 
to the creation of food products or dietary supplements, for both consumer 
and clinical food and beverage markets, with health claims, often called 
"functional foods" or "nutraceuticals".*  The Company further believes that 
the inclusion of Proventra in functional foods or nutraceuticals, along with 
including other components such as active cultures and dietary soluble fiber 
for which the Company has licensed certain patents, provide important 
benefits and competitive advantages, including (i) a unique immune-enhancing 
system, (ii) a fit with consumer needs, and (iii) a safe, proven means to 
enhance the body's natural resistance.*  
     
     Functional foods and nutraceuticals have been defined as foods which 
provide benefits beyond their nutritional value.  While there is not a 
regulatory definition for the terms "functional food" or "nutraceutical", 
these terms are widely used in the marketplace.  The Company believes that 
the enactment by Congress of the Nutrition Labeling and Education Act 
("NLEA") in 1990 and the Dietary Supplement Health and Education 


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Act ("DSHEA") in 1994 enabled the regulatory process for marketing foods or 
dietary supplements.  NLEA permits certain health claims related to the 
food's ability to reduce the risk of certain diseases.  DSHEA permits such 
products to bear "structure-function" claims related to how the product 
affects the structure or function of the body, and such claims do not require 
Food and Drug Administration ("FDA") review or approval, but must be 
supported by scientific evidence. The Company believes that the incorporation 
of Proventra in foods or dietary supplements would add benefits to these 
products, particularly since there is a significant amount of scientific data 
to support the benefits of colostrum.*

     According to Frost & Sullivan, a competitive-market analysis firm, the 
market for nutraceutical or functional food beverages, into which the 
Company's Proventra could be incorporated, now exceeds $20 billion.  The 
Company believes that this significant market size is due to a number of 
factors, including (i) increased interest in healthier lifestyles, (ii) the 
publication of research findings supporting the positive health effects of 
certain nutritional supplements and (iii) the aging of the "Baby Boom" 
generation combined with the tendency of consumers to purchase more 
nutritional supplements as they age.*

CRITICAL CARE PRODUCTS

     Critically ill or severely injured patients are often unlikely to 
consume adequate nutrients, which can exacerbate a patient's condition, cause 
complications and prolong hospital stays. Total enteral nutrition delivers, 
often via specialized pumps, formulations of protein, carbohydrates, fat and 
vitamins via feeding tubes directly into the patient's intestinal tract.  
Unless nearly all of the intestinal tract is missing or nonfunctional, most 
patients can be fed via this enteral route. One application of enteral 
nutrition is in the treatment of critical care patients. The largest single 
category of total enteral nutrition products used in critical care are 
products that contain unique protein sources referred to as "elemental." 
Unlike long-term care formulas that contain "whole protein," which must be 
digested before it can be absorbed and utilized by the patient, elemental 
formulas contain predigested protein that offers immediately available 
nutrition because little or no digestion is required. All of the Company's 
recently acquired critical care nutrition products are elemental formulas. 
The critical care nutrition formula market is currently dominated by a small 
number of established manufacturers of national brands, each of which focuses 
on particular segments of the market. These manufacturers include Ross 
Laboratories, a division of Abbott Laboratories ("Ross Laboratories"), Mead 
Johnson Nutritionals, a Bristol-Myers Squibb Company ("Mead Johnson"), 
Novartis, formerly known as Sandoz Corp. ("Novartis"), Nestle Ltd ("Nestle"), 
formerly known as Clintec Nutrition Co., and McGaw, Inc. ("McGaw").  
Meanwhile, the United States health care system has been under pressure to 
control costs. As a result, the medical community and consumers have come to 
accept lower cost-effective drugs and private label over-the-counter 
products, and the market for these products has grown rapidly. The Company 
believes it is the only company that has addressed the critical care medical 
nutrition market with lower cost alternatives to established brands.* The 
Company is researching ways in which to incorporate certain of its 
immune-enhancing ingredients into selected products acquired from NMI to 
provide additional proprietary protection and added benefits that are not 
currently available in that market segment.* The Company sells its critical 
care nutrition formulas under its NMI label.

Business Strategy

     GalaGen has determined to focus on two market segments to optimally 
capitalize on its immune-enhancing capabilities: (i) nutritional consumer 
food and beverage products and (ii) clinical nutrition products. The former 
emphasis will yield products containing Proventra, and other immune 
components, in grocery and health food stores. The latter will yield 
products for hospitals, nursing homes and home healthcare that may contain 
Proventra or other immune-enhancing ingredients.  The Company will utilize 
relationships and collaborations with strategic partners to deliver these 
products to the marketplace.*

     To advance the introduction of GalaGen's Proventra or other 
immune-enhancing ingredients into the two market segments, the Company has 
recently entered into several strategic partner agreements, including the 
following:


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CONSUMER FOOD AND BEVERAGE PRODUCTS

     GENERAL NUTRITION CORPORATION
     
     In December 1998, the Company entered into an agreement with General 
Nutrition Corporation ("GNC").  Under this agreement, GalaGen and GNC will 
develop and market a range of immune-boosting dietary supplements and sports 
nutrition formulas for specialized retail and mass-market retail channels 
using certain proprietary formulations of Proventra.  The Company will sell 
its Proventra to General Nutrition Products, Inc. ("GNP"), the manufacturing 
company of GNC, for incorporation into the products for exclusive 
distribution and retail marketing in North America by GNC, its affiliates, 
franchisees and certain other stores in mass market channels. The agreement 
calls for GNC to maintain minimum sales requirements for both the specialty 
retail and mass market channels for exclusivity to continue.  The first 
products are targeted for launch in the second half of 1999, following the 
initial product development phase of the collaboration.*

     TROPICANA
     
     In March 1999, the Company entered into an agreement with Tropicana 
Products, Inc., a division of PepsiCo Inc.  Under the agreement, the two 
companies will explore development of nutritious beverages for the 
health-conscious consumer.

     LAND O'LAKES
     
     In April 1998, GalaGen entered into an agreement with Land O'Lakes to 
develop and introduce into market a line of yogurt products incorporating 
Proventra.  Products developed under this arrangement will leverage Land 
O'Lakes strength as a dairy producer and marketer. The first products are 
targeted for a second half 1999 test market launch.*
     
     LIFEWAY FOODS, INC.
     
     In December 1997, the Company assisted in introducing Basics Plus-TM-, a 
dietary supplement product, in conjunction with its marketing and 
manufacturing partner, Lifeway Foods, Inc.  It contains active kefir 
cultures, which are cultures that contain beneficial bacteria strains, and 
GalaGen's Proventra. Basics Plus is the first dairy-based dietary supplement 
sold in the United States in the refrigerated section of health food stores 
and grocery stores. The product was featured in the February 1998 issue of 
DAIRY FOODS MAGAZINE and has gained recognition as an industry breakthrough.  
DAIRY FOODS MAGAZINE named Basics Plus the top new dairy product in 1998 for 
the Functional Foods category (November 1998 issue).

     RHONE-POULENC / RHODIA
     
     In June 1998, GalaGen announced a nutritional products collaboration 
with Rhodia, Inc., a $6 billion Rhone-Poulenc spin-off. The two companies are 
exploring the possible development and marketing of a patent-protected 
combination of ingredients for use in nutritional products positioned for the 
nutraceutical and functional foods markets. Under this arrangement, products 
will contain GalaGen's Proventra and Rhodia's proprietary active cultures.

CLINICAL NUTRITION PRODUCTS
     
     CRITICAL CARE PRODUCTS (NMI)
     
     In  September 1998, the Company entered into an asset purchase agreement 
with NMI to acquire NMI's developed line of critical care enteral nutrition 
products and formulas. The products were recently introduced by NMI and are 
being sold to the hospital and home healthcare industries. The asset purchase 
agreement was closed in December 1998. GalaGen purchased substantially all of 
NMI's critical care enteral nutrition products and formulas, all related 
inventory and certain other assets, including the existing customer 


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base of over 500 hospitals and home healthcare facilities.  The sales and 
marketing group from NMI joined the Company to provide continuity in 
operations and an essential marketing base.  The Company will continue to 
have all products associated with this asset purchase manufactured by outside 
parties.

     Critical care nutrition formulas are used by hospitals and other health 
care providers to feed critically ill patients who cannot consume adequate 
nutrients orally and consequently require specialized feeding via tubes into 
the intestinal tract. The use of critical care nutrition formulas often 
continues at home or in a nursing home after a patient is discharged from the 
hospital. The Company's strategy is to focus on the development and sale of a 
core line of critical care formulas for patients who do not metabolize foods 
well and are most likely in intensive care units. Certain unique ingredients 
are combined to meet the special nutritional requirements of specific patient 
populations. The Company markets its critical care and disease specific 
nutrition products to hospitals and other health care providers as cost 
effective alternatives to the established products offered by brand name 
manufacturers.

     The Company is selling nine nutrition products for critical care, liver 
failure and moderately stressed patients. Most products contain elemental 
protein sources, which contain predigested protein that offers immediately 
available nutrition. The first proprietary critical care formula, Glutasorb, 
was launched by NMI in February 1998. This formula is the first high 
glutamine, ready-to-use liquid elemental diet available in the United States 
and, as such, has no specific competing branded product.  The following chart 
provides information regarding each of the Company's critical care nutrition 
products.

<TABLE>
<CAPTION>
                                   DATE
PRODUCT NAME                    INTRODUCED                        PRODUCT DESCRIPTION
- ------------                  --------------                      -------------------
<S>                           <C>             <C>
L-Emental-TM-                 May 1994        A 100% free amino acid-based elemental nutrition      
                                                formula for gastrointestinal ("GI") impaired or
                                                critically ill patients
L-Emental Hepatic-TM-         June 1996       A 100% free amino acid and calorie supplement for the
                                                dietary management of chronic liver disease
                                                patients.
L-Emental Pediatric-TM-       June 1996       A 100% free amino acid elemental diet for GI impaired
                                                children ages 1 to 10
Pro-Peptide Unflavored-TM-    November 1994   A ready-to-use, isotonic, peptide-based diet for GI
                                                impaired patients
Pro-Peptide VHN-TM-           November 1995   A high nitrogen, isotonic, peptide-based diet for GI
                                                impaired and critically impaired patients who
                                                require high protein levels
Pro-Peptide Vanilla-TM-       November 1995   Vanilla flavored ready-to-use, peptide-based diet for
                                                GI impaired patients who require an oral product
Pro-Peptide For Kids-TM-      May 1997        Vanilla flavored ready-to-use, peptide-based diet for
                                                children ages 1 to 10 who are GI impaired
Glutasorb-TM-                 February 1998   Ready-to-use, high glutamine, amino acid-peptide based
                                                product for patients who have severe catabolic
                                                illness, GI dysfunction, surgery and trauma
Nitro Pro-TM-                 July 1998       A ready-to-use high-protein tube feeding product for
                                                moderately stressed patients                        

</TABLE>

     With the exception of Glutasorb, the Company generally establishes 
target prices for its critical care and disease specific nutrition products 
that are below the selling prices of competing established brand name 
products. To maintain or increase the gross margin of the products, the 
Company is researching ways in which to incorporate certain of its 
immune-enhancing ingredients into certain products listed above to provide 
additional proprietary protection and added benefits that are not currently 
available in that market segment.*  Additional products that the Company may 
introduce would include proprietary immune-enhancing features.*

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     AMERICAN HOME PRODUCTS - WYETH AYERST

     In October 1998, the Company entered into a collaboration and license 
agreement and a manufacturing and supply agreement with Wyeth-Ayerst, a 
division of American Home Products Corporation.  The two companies will 
develop and commercialize a proprietary ingredient with unique antibacterial 
properties for use in pediatric formula and other nutritional products.  The 
companies will collaborate during the research and development phase of the 
product, which will be funded by Wyeth-Ayerst.  Additionally, Wyeth-Ayerst 
will have financial and oversight responsibilities for all clinical trials 
and regulatory compliance related to the use of the ingredient in pediatric 
formula products. Wyeth-Ayerst will have worldwide rights to the use of the 
ingredient in its pediatric formula and other nutritional products.  GalaGen 
will retain certain rights to manufacture the ingredient and has the right to 
request a sublicense from Wyeth-Ayerst to develop and commercialize 
non-pediatric formula nutritional products.  GalaGen will also receive 
licensing and milestone payments.

     HORMEL-AMERICAN INSTITUTIONAL PRODUCTS

     In March 1999, the Company announced that it entered into a licensing and 
distribution agreement with American Institutional Products, Inc. (AIP), a 
subsidiary of Hormel Foods Corporation. Under the agreement, AIP has 
exclusively licensed the manufacturing and distribution rights for a new, 
clinically tested, cultured dairy beverage developed by GalaGen to improve 
the gastrointestinal health of patients in hospitals and nursing homes. The 
product will incorporate Proventra and includes an ingredient combination 
that is patented.  A test market for the product in the Upper Midwest is 
scheduled to begin in mid 1999.*

MANUFACTURING SYSTEM

PROVENTRA MANUFACTURING
     
     The Company's manufacturing system produces antibodies for nutritional 
products.  The Company's system has been designed to access very large 
numbers of cows in commercial milking herds, organize them into discrete 
product-specific groups and, if needed, immunize them with specific antigens 
to heighten the natural production of targeted antibodies in their colostrum, 
collect the colostrum and concentrate the antibodies using proprietary 
processes.  These processes preserve the essential antibody activity and 
other immune-enhancing components while reducing unnecessary components, 
including microbial contaminants. Modern dairy cows, having been bred for 
high volume milk production, produce colostrum in quantities far greater than 
their calves can consume.  After the calf fulfills its colostrum needs, this 
surplus colostrum can then be collected by the Company.

     Standard dairy processing techniques destroy the activity of most of the 
antibodies present in milk and colostrum and render them inactive.  The 
proprietary processes used by the Company to concentrate antibodies have been 
developed by the Company through many years of research and development.  
This work has resulted in processes that use well-tested and efficient dairy 
manufacturing techniques, including pasteurization, that have been modified 
to preserve the biological activity of the antibodies.  The Company has two 
patents that have been issued for these processes. The Company is supporting 
its proprietary antibody processing system with a quality control system 
designed to regulate, monitor and review the processing system.  The Company 
has obtained Kosher certification for the natural immune components found in 
Proventra. Additionally, the Company has obtained the appropriate license 
from the Minnesota Department of Agriculture.

     Construction of the Company's manufacturing facility within the existing 
Land O'Lakes manufacturing complex in Arden Hills, Minnesota was completed in 
1996.  Land O'Lakes has guaranteed the equipment leases associated with the 
manufacturing facility.  The Company believes that the capacity of this 
facility will be adequate for the production of Proventra for nutritional 
products, either for sale or product 


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development requirements, through 2000 and believes that contract 
manufacturers would be available to increase its production capacity quickly, 
if required.*

CRITICAL CARE PRODUCT MANUFACTURING

     All of the Company's critical care products acquired from NMI are 
manufactured by third parties. These toll manufacturers are subject to FDA 
regulatory requirements for food and medical food production, and the 
Company's products undergo quality control testing during and after the 
production process. By using third party manufacturers, the Company is better 
able to introduce new products that require differing manufacturing 
processes and maintain a favorable fixed cost structure. Critical care 
nutrition products are shipped from the manufacturer to the Company's 
distribution facility in Arden Hills, Minnesota.  The Company believes that 
there are several manufacturers in the United States that could manufacture 
the critical care products and that it is not dependent upon one single 
manufacturer for its product supply.*

MARKETING, RESEARCH AND RELATIONSHIPS

MARKETING

     FUNCTIONAL FOOD AND NUTRACEUTICAL PRODUCTS

     To exploit Proventra as broadly as possible in human applications, the 
Company's consumer and clinical products strategy, except for those critical 
care products acquired from NMI, is to enter into strategic relationships 
with food companies to develop products that incorporate Proventra and/or 
other immune combinations and/or to sell Proventra to food companies as an 
ingredient.*  The Company does not anticipate that it will manufacture, 
market or distribute any final food product, but will rely upon 
collaborations with larger companies to accomplish these goals.*

     CRITICAL CARE PRODUCTS

     The Company employs its own inside sales personnel to market its 
critical care nutrition products. These sales personnel target, via 
telephone, the appropriate departments of hospitals, nursing homes and home 
health care organizations. This approach reduces the Company's selling costs 
by eliminating travel expenses and allowing its sales personnel to contact 
and service a larger number of potential and actual customers. The Company 
also uses direct mail and trade shows to further promote its products. In 
addition, the Veteran's Administration and state and county hospitals have 
annual bids for clinical nutrition products, and the Company actively 
participates in these bids.

RESEARCH

     FUNCTIONAL FOOD AND NUTRACEUTICAL PRODUCTS
     
     The Company's product development strategy is to pursue its own research 
programs internally and to complement such programs by establishing 
relationships with key external medical, academic, governmental and major 
research organizations.  Specifically, the Company intends to continue 
complementing its extensive immune-enhancing technology base by acquiring 
access to additional proprietary technology and patents in the areas of 
antibodies, vaccine, molecular biology, and processing and manufacturing 
technology.*  The Company also may seek collaborative arrangements for 
commercialization of its Proventra-based products.* The Company spent 
$1.9 million, $3.8 million and $5.3 million for product development in fiscal 
years 1998, 1997 and 1996, respectively.  The expenses incurred in 1996, 1997 
and a portion of 1998 relate to the Company's pharmaceutical program, which 
has been discontinued.

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<PAGE>

     CRITICAL CARE PRODUCTS

     As part of NMI, the product development process began with a 
determination that a market opportunity existed with respect to a particular 
product. NMI then contracted with an outside laboratory to analyze the 
ingredients of the competitor's product and to formulate its version of the 
product. Certain members of NMI's scientific advisory board consulted with 
the contractors during the development process.  The Company anticipates that 
any future product development may generally follow this procedure, but 
anticipates that any new products will incorporate immune-enhancing benefits 
to make a product proprietary and have unique features not currently 
available in the market so as to maintain or increase gross margins.* The 
Company's critical care, disease specific and intact protein nutrition 
formulas are not required to undergo clinical testing or obtain FDA approval 
for such products, though they are subject to certain FDA guidelines.

LAND O'LAKES RELATIONSHIP

     The Company believes that the Company's existing relationship with Land 
O'Lakes provides it with certain advantages over existing and potential 
competitors.*  Land O'Lakes made significant advances in the development and 
commercialization of antibody products for treating and preventing diseases 
in animals.  This technology provides the Company with a solid foundation on 
which to base its efforts to develop similar products for human use. 

     Under a supply agreement with Land O'Lakes, the Company agreed to 
purchase all of its commercial requirements for colostrum from Land O'Lakes 
through May 7, 2002, subject to Land O'Lakes' option to renew the supply 
agreement for an additional ten-year period.  The Company must provide 
program specifications to Land O'Lakes prior to commencing each of its 
commercial programs and Land O'Lakes must notify the Company within a 
specified period whether it will supply according to the agreement.  If Land 
O'Lakes does not confirm during that period that it will supply colostrum 
according to the specifications, then the Company has the right to obtain the 
colostrum from alternative sources.  Commercial production of Proventra could 
be delayed if Land O'Lakes does not elect to supply according to the supply 
agreement and the Company is required to locate an alternate supplier.

     When the Company was formed, it signed a letter of intent with Land 
O'Lakes to develop strategic relationships focused on the development of 
functional food products.  In March 1998, the Company and Land O'Lakes signed 
an amended and restated license agreement (the "Restated License") in which 
the Company has significantly broadened its rights to develop and market 
functional foods. Under the Restated License, the Company can use, improve, 
exploit, license or share existing Procor Technology, Inc. (the Company's 
predecessor, "Procor") technology, Procor technology improvements and new 
technologies, as defined, in all areas of functional foods except under 
certain "reserved food product" and "first refusal food product" categories, 
as defined.  If the Company intends to engage in manufacturing or marketing 
any "first refusal food product", the Company must give Land O'Lakes notice 
of its intent, in which case Land O'Lakes can negotiate with the Company, in 
good faith and within a defined period of time, to undertake any part of the 
manufacturing or marketing areas.  If the Company intends to engage in 
manufacturing or marketing any "reserved food product", the Company must give 
Land O'Lakes notice of its intent and must only work with Land O'Lakes to 
undertake the manufacturing or marketing of such products.  In the original 
license agreement with Land O'Lakes, the Company retained rights to pursue 
the development of infant formula products containing polyclonal antibody 
technology.
     
     In March 1997, Land O'Lakes granted the Company a license (the "Kefir 
License") to use existing antibody technology and future improvements in the 
development, formulation, manufacture, marketing, distribution and sale of 
kefir-based products, as defined in the Kefir License.  In consideration of 
granting the Kefir License, Land O'Lakes will receive a royalty based on food 
components or ingredients sold by the Company to be included in any 
kefir-based product and on net receipts from any kefir-based finished product 
sold by the Company. 


                                       9

<PAGE>

PROPRIETARY RIGHTS AND PATENTS

FUNCTIONAL FOOD AND NUTRACEUTICAL PRODUCTS

     The Company's policy is to protect its proprietary technology as trade 
secrets and by filing patent applications on technology for which the Company 
believes patent protection is available and is in the best interest of the 
Company.  The Company also relies upon know-how, continuing technological 
innovations and licensing opportunities to develop and maintain its 
competitive position. 

     The Company believes that certain of its process improvements are more 
valuable as trade secrets than as patented processes, where the process 
improvements would have to be publicly disclosed.  The Company relies on 
trade secrets and proprietary know-how it developed while manufacturing 
antibody products as Procor.  The Company believes that substantial barriers 
exist for competitors desiring to commercialize antibodies derived from milk 
or colostrum that have the features that the Company's antibodies, or 
Proventra, have*; however, there can be no assurance that other companies 
will not develop production processes or initiate relationships with other 
large dairy cooperatives to develop a similar procurement system.  The 
Company seeks to protect trade secrets and know-how through confidentiality 
agreements with employees, consultants and other parties.  These agreements 
provide that all confidential information developed or made known during the 
course of the relationship with the Company is to be kept confidential and 
not disclosed to third parties, except in specific circumstances.  No 
assurance can be given that such agreements will provide meaningful 
protection for the Company's unpatented trade secrets or provide adequate 
remedies in the event of unauthorized use of such information.  Neither can 
assurance be given that others will not independently develop substantially 
equivalent proprietary information and technology or otherwise gain access to 
the Company's trade secrets or disclose such technology. 

     The Company has been issued four patents from the United States Patent & 
Trademark Office.  Two patents cover significant processes in its core 
manufacturing technology for antibodies for microfiltering milk and colostrum 
that reduces contaminants while improving yield.  The third patent covers the 
therapeutic use of CLOSTRIDIUM DIFFICILE specific bovine antibodies for the 
treatment of C. DIFFICILE related diseases such as diarrhea. The fourth 
patent covers a vaccine composition for generating specific, high titer 
antibodies against CRYPTOSPORIDIUM PARVUM. The Company also has three United 
States patent applications pending and has acquired licenses to a number of 
patents or patent applications of others.  The Company's United States patent 
applications are in the area of bovine antibody technology and product 
applications.  The Company believes that useful, new and unobvious antibody 
formulations also may be patentable in support of its immune-enhancing 
strategy.*  Furthermore, in some cases, patent coverage may be available for 
the vaccines or antigens used to provoke the immunological response which 
produces the antibodies.  The Company has also obtained sole licenses for 
enabling patents from Metagenics, Inc relating to the combination of 
antibodies and soluble fibers, and antibodies and active cultures for use in 
the fields of dietary supplements and medical foods. Metagenics, Inc. retains 
the right to use these patents for its own products.  The Company has also 
acquired a patent from Biotest Pharma GmbH for an alternative antibody 
processing technology.  The Company's strategy is to pursue patent protection 
for each of its products where possible, including their components, as well 
as for certain process and formulation improvements, although the Company may 
not be successful in achieving broad patent protection for its technology.

     The Company has become aware of several patents that may relate to its 
antibody technology.  In 1991, the Company became aware of one such issued 
patent.  Land O'Lakes engaged outside patent counsel to review the patent and 
such counsel rendered its written opinion to Land O'Lakes that the patent is 
not infringed by the Company's technology.  The Company engaged its own 
outside patent counsel to review the patent and such counsel rendered its 
independent opinion that the patent is not infringed by the Company's 
technology and that, in any event, the patent would be invalid if it were 
interpreted broadly enough so as to cover the Company's technology.  While 
the Company does not regard the patent as a threat to its business*, there 
can be no assurance that the holder of the patent will not pursue litigation 
which could be costly to the Company.


                                      10

<PAGE>

CRITICAL CARE PRODUCTS

     The Company is in the process of registering its existing trademarks, 
for the products acquired from NMI, with the United States Patent & Trademark 
Office.  As part of NMI, the products were not registered but instead relied 
on NMI's common law trademark rights. The lack of such registration may 
impair the ability of the Company to successfully register the trademarks or 
to prosecute successfully an infringement action against other users of these 
trademarks. There can be no assurance that the Company's marks do not or will 
not violate the proprietary rights of others, that the Company's proprietary 
rights in the marks would be upheld if challenged, or that the Company would 
not be prevented from using its marks, any of which could have an adverse 
effect on the Company.* In addition, there can be no assurance that the 
Company will have the financial resources necessary to enforce or defend its 
trademarks.*

GOVERNMENT REGULATION

FUNCTIONAL FOOD AND NUTRACEUTICAL PRODUCTS

     GENERAL

     The formulation, manufacturing, processing, packaging, labeling, 
advertising, distribution and sale of nutritional supplements such as those 
being developed  by the Company are subject to regulation by one or more 
federal agencies, principally the FDA and the Federal Trade Commission (the 
"FTC"), and to a lesser extent the Consumer Product Safety Commission and the 
United States Department of Agriculture.  These activities are also regulated 
by various governmental agencies for the states and localities in which the 
Company's products are sold, as well as by governmental agencies in certain 
foreign countries in which the Company's products are sold.  Among other 
matters, regulation of the Company by the FDA and FTC is concerned with 
claims made with respect to a product which refer to the value of the product 
in treating or preventing disease or other adverse health conditions.

     Federal agencies, primarily the FDA and FTC, have a variety of remedies 
and processes available to them, including initiating investigations, issuing 
warning letters and cease and desist orders, requiring corrective labels or 
advertising, requiring consumer redress (for example, requiring that a 
company offer to repurchase products previously sold to consumers), seeking 
injunctive relief or product seizure and imposing civil penalties or 
commencing criminal prosecution.  In addition, certain state agencies have 
similar authority, as well as the authority to prohibit or restrict the 
manufacture or sale of products within their jurisdiction. These federal and 
state agencies have in the past used these remedies in regulating 
participants in the nutritional products industry, including the imposition 
by federal agencies of civil penalties in the millions of dollars against a 
few industry participants.  There can be no assurance that the regulatory 
environment in which the Company operates will not change or that such 
regulatory environment, or any specific action taken against the Company, 
will not result in a material adverse effect on the Company's business, 
financial condition or results of operations.*  In addition, increased sales 
and publicity of nutritional supplements may result in increased regulatory 
scrutiny of the nutritional supplements industry.

     DIETARY SUPPLEMENT HEALTH AND EDUCATION ACT

     DSHEA was enacted in October 1994, amending the Food, Drug and Cosmetic 
Act.  The Company believes this law is generally favorable to the dietary 
supplement industry.*  DSHEA establishes a new statutory class of "dietary 
supplements," which includes vitamins, minerals, herbs, amino acids and other 
nutritional supplements for human use to supplement the diet and includes in 
such class all dietary ingredients 


                                      11

<PAGE>

on the market as of October 15, 1994.  Such class of nutritional supplements 
will not require the submission by the manufacturer or distributor of 
evidence of a history of use or other evidence of safety establishing that 
the supplement will reasonably be expected to be safe, but a nutritional 
supplement which contains a dietary ingredient which was not on the market as 
of October 15, 1994 does require such submission of evidence of a history of 
use or other evidence of safety. Among other things, this law prevents the 
further regulation of dietary ingredients as "food additives" and allows the 
use of statements of nutritional support on product labels. DSHEA allows the 
use of "structure/function" claims on the label of a product, which may allow 
the Company to communicate advantages of Proventra without the expenses 
associated with FDA clinical trials.*  The law requires companies to file 
label claim information with FDA within 30 days after initiating marketing of 
a product, and FDA may respond with a "courtesy letter" commenting on the 
claims if it believes they are not appropriate.

     OTHER REGULATORY REQUIREMENTS

     The Company is also subject to regulation by the Occupational Safety and 
Health Administration, the Environmental Protection Agency and the Minnesota 
Environmental Quality Board and to regulation under the Toxic Substances 
Control Act, the Resource Conservation and Recovery Act, among others, and 
other regulations, and may in the future be subject to other federal, state 
and local statutes or regulations.  The Company is unable to predict whether 
any agency will adopt any regulation which would have a material adverse 
effect on the Company.

CRITICAL CARE PRODUCTS

     The Company's products purchased from NMI are subject to government 
regulation. The Company's current critical care products are regulated as 
food and medical food by the FDA and are subject to labeling requirements, 
current good manufacturing practice regulations and certain other regulations 
designed to ensure the safety of the products. Claims made by the Company in 
labeling and advertising its products are subject to regulation by the FDA, 
the FTC and various state agencies under their general authority to prevent 
false, misleading and deceptive trade practices. These regulations involve 
more stringent tracking, testing and documentation standards. Failure to 
comply with FDA requirements can result in adverse regulatory action, 
including injunctions, civil or criminal penalties, product recalls or the 
relabeling, reformulation or possible termination of certain products. 

COMPETITION

FUNCTIONAL FOOD AND NUTRACEUTICAL PRODUCTS

     The nutritional products area is highly fragmented and competitive with 
many large nationally known manufacturers and many smaller manufacturers and 
marketers of nutritional products.  The Company has licensed patents from 
Metagenics regarding the incorporation of  antibodies combined with active 
cultures and antibodies combined with soluble fiber.  Many of the nutritional 
products the Company anticipates developing, in conjunction with a strategic 
partner, will be covered by these patents.  Potential competitors, however, 
could be larger than the Company, have greater access to capital and may be 
better able to withstand volatile market conditions.  Moreover, because the 
nutritional products industry generally has low barriers to entry, additional 
competitors could enter the market at any time.  In that regard, although the 
nutritional products industry to date has been characterized by many 
relatively small participants, national or international companies (which may 
include food or pharmaceutical companies or other suppliers to the mass 
markets) may seek to enter or to increase their presence in this industry, 
which would have a material adverse effect on the Company's competitive 
position.

     The Company has assessed the factors that may make it competitive in 
this environment and believes that its central strength is that the products 
it will develop in conjunction with various partners will be unique, distinct 
and proprietary in the marketplace.*  This distinction is made by offering in 
its products direct immune enhancing benefits that include Proventra and a 
combination of other  key ingredients, such as active 


                                      12

<PAGE>

cultures and soluble fiber, currently not available in the market.  Such 
products will also be subject to patent protection.*  Another strength 
includes proprietary technologies that can enhance Proventra by offering 
immune protection against specific common disease-causing pathogens.*  
Additionally, the Company's collaborative relationships offer financial, 
production, sales and distribution synergies beyond those of GalaGen itself 
which allow the Company to compete more effectively.*  

COLOSTRUM MANUFACTURERS

     The Company knows of certain colostrum manufacturers, including New 
Zealand Dairy and La Belle, Inc., which supply colostrum in dried or liquid 
form.  These competitors are larger than the Company, have greater access to 
capital and may be better able to withstand volatile market conditions. 
Potential competitors could also be larger than the Company, have greater 
access to capital and may be better able to withstand volatile market 
conditions.  The colostrum market requires access to a substantial number of 
dairy cows to be commercially successful.  The Company has assessed the 
factors that may make it competitive in this environment and believe that its 
central strengths are: (i) its access to 750,000 dairy cows in the Land 
O'Lakes system, (ii) its ability to pasteurize, and/or certify Kosher, 
colostrum while still maintaining the effectiveness of the immune-enhancing 
components, namely antibodies, which the Company believes no competitor 
offers, and (iii) additionally, its ability to enhance Proventra by offering 
immune protection against targeted pathogens.* 

CRITICAL CARE PRODUCTS

     Competition in the critical care nutrition products market primarily 
consists of five companies that have established brands in the specialty 
markets in which the Company has chosen to compete. These companies, 
Novartis, Mead Johnson, Nestle, Ross Laboratories and McGaw, each market 
their specialty products through sales personnel who generally use 
traditional in-person sales calls rather than the telemarketing approach 
historically employed by the Company. Novartis, Mead Johnson, Nestle, Ross 
Laboratories and McGaw are all larger than the Company, have greater access 
to capital and are likely to be better able to withstand volatile market 
conditions. Although the Company believes it is the only company currently 
offering low cost alternatives to the established brands, other companies may 
enter this market.*

EMPLOYEES

     At December 31, 1998, the Company had 19 employees, eight of whom came 
from NMI when the Company acquired certain assets of NMI and are in the 
sales, marketing and quality control areas.  Two employees have Ph.D. 
degrees, and one of whom also has an M.D. degree.  Five employees are 
currently working in product development, including the clinical regulatory 
area.  The Company believes its employee relationships are good. 

RISK FACTORS

     
Certain statements made in this Annual Report on Form 10-K, including those 
indicated by an asterisk above, are forward-looking statements based on our 
current expectations, assumptions, estimates and projections about our 
business and our industry.  These forward-looking statements involve risks 
and uncertainties.  Our business, financial condition and results of 
operations could differ materially from those anticipated in these 
forward-looking statements as a result of certain factors, as more fully 
described below and elsewhere in this Form 10-K.  You should consider 
carefully the risks and uncertainties described below, which are not the only 
ones facing our Company. Additional risks and uncertainties also may impair 
our business operations.  We undertake no obligation to update publicly any 
forward-looking statements for any reason, even if new information becomes 
available or other events occur in the future.


                                      13

<PAGE>

GENERAL

     WE MAY NOT EVER ACHIEVE A PROFITABLE LEVEL OF OPERATIONS.

     Our ability to achieve profitable operations depends in large part on:

     -    entering into agreements to develop products and establish markets for
          those products; and

     -    making the transition from a research company to an operating and
          marketing company.  

     We cannot be sure we will be successful in ever achieving either result. 
We have experienced significant operating losses in each year since our 
inception in 1987.  We have an accumulated deficit of more than $57 million 
as of December 31, 1998.  We may continue to lose money in the future.

     IF WE CANNOT OBTAIN CONTINUING FUNDING, WE MAY BE UNABLE TO IMPLEMENT 
OUR BUSINESS PLANS.  
     
     If we cannot find adequate funding, we may have to delay or eliminate 
some of our product development plans.  We may be required to grant licenses 
to others to establish markets for products or technologies that we would 
otherwise seek to market ourselves.  

     Our cash requirements for working capital depend on numerous factors. 
These factors include:

     -    our spending on marketing activities, including clinical marketing 
          trials;
     -    our progress in finding partners to help us develop products and
          market those products;
     -    the willingness and ability of our partners to provide funding for our
          activities;
     -    our spending on product development programs;
     -    the rate of technological advances in the production of our products;
     -    our spending on facilities, equipment and personnel to make our
          products; and
     -    the status of competitive products.

     Our long-term ability to continue funding our planned operations depends 
on our ability to obtain additional funds through:

     -    product revenues; 
     -    equity or debt financing; 
     -    finding partners to help us develop products and market those
          products; 
     -    license agreements; or
     -    other financing sources.

     Because of our significant long-term capital requirements, we may seek 
to raise funds when conditions are favorable.  We may do so even if we do not 
have an immediate need for the capital at the time we raise it.  If we have 
not raised funds prior to when our needs for funding become immediate, we may 
be forced to raise funds when conditions are unfavorable.  This could result 
in significant dilution of our current stockholders.

     IF WE DO NOT ACHIEVE A PROFITABLE LEVEL OF OPERATIONS AND CANNOT FIND 
FUNDING IN THE FUTURE, WE COULD EVENTUALLY BECOME INSOLVENT OR BANKRUPT. 

     If we do not achieve a profitable level of operations and we do not 
obtain funding necessary from some source other than operations, we could 
eventually deplete our cash reserves and become insolvent or bankrupt.

     THE RELATIVELY LOW LEVEL OF TRADING IN OUR COMMON STOCK MAY MAKE IT 
HIGHLY VOLATILE.

     While our Common Stock has been traded on the Nasdaq National Market 
since our initial public offering, the volume of shares of Common Stock 
traded on that market has been relatively small.  Given the small volume of 
shares traded, market fluctuations may have a particularly adverse effect on 
the market price of our Common Stock.  We cannot be sure of the liquidity of 
the market for the Common Stock or the price at which any sales may occur.  
The volume of trading in our 

                                      14

<PAGE>

Common Stock in the future will depend upon the number of holders of the 
Common Stock, the interest of securities dealers in  maintaining a market in 
the Common Stock and other factors beyond our control.  The market price of 
our Common Stock could be subject to significant fluctuations in response to:
     
     -    our operating results; 
     -    the operating results of our competitors or other biotechnology
          companies; 
     -    technological developments;
     -    government regulations;
     -    the status of our proprietary rights to potential products; 
     -    litigation;
     -    public safety concerns; and 
     -    other factors.  

     Some of these factors are unrelated to our operating performance and 
beyond our control.
     
     GALAGEN AND THE OWNERS OF SHARES OF OUR COMMON STOCK MAY HAVE DIFFICULTY 
IN SELLING THOSE SHARES IN THE FUTURE IF OUR COMMON STOCK IS REMOVED FROM 
LISTING ON THE NASDAQ NATIONAL MARKET.

     We must meet specific requirements for our shares to continue to be 
listed on the Nasdaq National Market.  Although we were meeting all of those 
requirement as of December 31, 1998, we cannot be sure that we will continue 
to meet them in the future. If we fail to meet the continued listing 
requirements, or fail to file a plan acceptable to Nasdaq for meeting those 
requirements, Nasdaq may remove our Common Stock from listing on the National 
Market.  We cannot be sure that our Common Stock will continue to be listed 
on the National Market. If in the future our Common Stock fails to qualify 
for continued listing on the National Market, we would apply to have its 
listing transferred to the Nasdaq SmallCap Market.  If the listing of our 
Common Stock is transferred from the National Market to the SmallCap Market, 
it may be more difficult for owners of our Common Stock to sell it through 
brokers.  Additionally, we may have more difficulty raising funds through the 
sale of our Common Stock or securities convertible into Common Stock.

     If trading privileges in our Common Stock on the Nasdaq National Market 
were terminated, we would be required to demonstrate compliance with the 
applicable requirements for initial inclusion of a security on the Nasdaq 
National Market before our Common Stock would be listed again on that 
exchange. The requirements for initial inclusion are more stringent than 
those for continued listing. 

     WE MAY BE SUBJECT TO PRODUCT LIABILITY CLAIMS THAT EXCEED OUR INSURANCE 
COVERAGE.

     Our business involves exposure to potential product liability risks that 
are inherent in the production, manufacture and distribution of consumer and 
clinical food products that are designed to be ingested. The successful 
assertion or settlement of any uninsured claim, a significant number of 
insured claims or a claim exceeding our insurance coverage could have a 
material adverse effect on our business and financial condition.  We cannot 
be sure that we will be able to obtain product liability insurance on 
acceptable terms or that provides adequate protection. Furthermore, we cannot 
be sure that we will be able to secure increased insurance coverage as the 
markets for our products increase.


                                      15

<PAGE>

     IF WE RELY ON INACCURATE MARKET INFORMATION, WE COULD MAKE DECISION THAT 
HAS A MATERIAL ADVERSE EFFECT ON OUR BUSINESS AND FINANCIAL CONDITION.

     Because we are currently developing our products and markets for those 
products, we are particularly reliant on market data.  If that data is 
inaccurate, we may commit resources to product development and marketing 
efforts that do not become profitable.  Product development and marketing 
efforts that do not become profitable may have a material adverse effect on 
our business and financial condition.  We have obtained market and related 
data from a competitive-market analysis firm.  We have not independently 
verified the accuracy of that information.  In any event, the methodology 
typically used in compiling market and related data makes it subject to 
inherent uncertainties and estimations.  As a result, we cannot be sure as to 
the accuracy or completeness of our market information.  

     INADEQUATE PROVENTRA PRODUCTION COULD HAVE A MATERIAL ADVERSE EFFECT ON 
OUR BUSINESS AND FINANCIAL CONDITION.

     Given our limited experience in manufacturing Proventra, we cannot be 
sure that we will be successful in producing Proventra of acceptable quality 
on a commercial scale and at acceptable costs in our manufacturing facility.  
If we cannot, our business and financial condition could be materially 
adversely affected.  Our production of Proventra will be regulated by the 
Minnesota Department of Agriculture.  We believe that our current 
manufacturing facility will meet the anticipated requirements for the 
production of Proventra for use in consumer and clinical nutritional products 
through the year 2000.  Further, we believe that contract manufacturers would 
be available to increase our Proventra production capacity quickly, if 
required. However, until we begin producing Proventra on a commercial scale, 
we cannot be sure that our production capabilities will be adequate.

     FAILURE OF OUR COLLABORATIONS TO DEVELOP AND MARKET PRODUCTS CONTAINING 
PROVENTRA COULD HAVE A MATERIAL ADVERSE EFFECT ON OUR BUSINESS AND FINANCIAL 
CONDITION.

     We are relying on collaborations with larger more establish companies to 
develop and market products containing Proventra.  Our collaborators' 
inability to bring products to market could have a material adverse effect on 
our business and financial condition.  We anticipate that products containing 
Proventra will be introduced in particular markets in the last half of 1999 
through collaborations we have established with other companies.  However, 
introduction of these products to test markets on schedule depends on our 
ability and our collaborators' ability to accomplish the following:

     -    finalize market research; 
     -    finalize product development; 
     -    establish product manufacturing; 
     -    initiate marketing, sales and distribution activities related to such
          products; and
     -    provide the funding necessary to accomplish such activities.  

     DELAYS OR HIGH COSTS IN PRODUCT DEVELOPMENT COULD HAVE A MATERIAL 
ADVERSE EFFECT ON OUR BUSINESS AND FINANCIAL CONDITION.

     If we, or our strategic partners cannot obtain accurate marketing data, 
or to develop a product responsive to the needs identified by that data, our 
business and financial condition could be materially adversely affected.  The 
amount of time it will take us, together with our strategic partner, to 
develop consumer and clinical nutrition products and the associated costs of 
developing those products depends on, among other things, the results of our 
market research for consumer and clinical products.  It also depends on our 
discussions with certain end users or purchasers of the potential products.  
Market research and discussions may give us indications of potential 
customers, what types of products they may desire and what clinical 
information is necessary for effective marketing and sales.


                                      16

<PAGE>

RISKS SPECIFIC TO FUNCTIONAL FOOD AND NUTRACEUTICAL PRODUCTS

     PUBLIC MISPERCEPTION THAT OUR PRODUCTS MAY NOT BE SAFE COULD HAVE A 
MATERIAL ADVERSE EFFECT ON OUR BUSINESS AND FINANCIAL CONDITION.

     We are highly dependent upon consumers' perception of the safety and 
quality of our products as well as of similar products distributed by other 
companies.  Thus, for example, the publication of reports asserting that such 
products may be harmful could have a material adverse effect on our business 
and financial condition, regardless of whether such reports are 
scientifically supported and regardless of whether the alleged harmful 
effects would be present at the dosages recommended for such products.

     INNOVATIVE INGREDIENTS MAY PRODUCE UNWANTED EFFECTS AND EXPOSE US TO 
PRODUCT LIABILITY CLAIMS OR LOSS OF CONSUMER CONFIDENCE.

     If we develop products with innovative ingredients that over time are 
shown to produce unwanted effects, we could be exposed to product liability 
claims and lose consumer confidence, which could have a material adverse 
effect on our business and financial condition.  Some of our future products 
may contain innovative ingredients or combinations of ingredients that do not 
have a long history of human consumption.  While we believe all of our 
products will be safe when taken as we direct, there is little long-term 
experience with human consumption of certain of these innovative product 
ingredients or combinations thereof in concentrated form.  Although we 
perform research and/or test the formulation and production of our products, 
we will sponsor only limited clinical studies or rely on other outside 
published data.  

     IF LARGER COMPANIES WITH GREATER ACCESS TO CAPITAL AND PRODUCT MARKETS 
ENTER OUR SEGMENT OF THE NUTRITIONAL PRODUCTS MARKET, WE MAY BE MATERIALLY 
ADVERSELY AFFECTED.

     Because the nutritional products industry generally has low barriers to 
entry, additional competitors could enter the market at any time. Potential 
competitors could be larger than we are, have greater access to capital than 
we do and may be better able to withstand volatile market conditions than we 
are. Although the nutritional products industry to date has been 
characterized by many relatively small participants, national or 
international companies (which may include pharmaceutical companies or other 
suppliers to mass merchandisers) may seek to enter or to increase their 
presence in this industry or to consolidate it. Increased competition in the 
industry could have a material adverse effect on our business and financial 
condition.

     OUR FAILURE TO OBTAIN NECESSARY APPROVALS OR OTHERWISE COMPLY WITH 
GOVERNMENT REGULATIONS COULD HAVE A MATERIAL ADVERSE EFFECT ON OUR BUSINESS 
AND FINANCIAL CONDITION.

     Our current and potential functional foods and nutraceutical products 
may become subject to governmental regulation in the future. The burden of 
such regulation could add materially to the costs and risks of our 
development and marketing efforts. There can be no assurance that we could 
obtain the required approvals or comply with new regulations if our products 
are subject to additional governmental regulation in the future.

     Some of our products in development may be subject to regulation by one 
or more federal agencies, principally the Food and Drug Administration and 
the Federal Trade Commission, and to a lesser extent the Consumer Product 
Safety Commission and the United States Department of Agriculture regarding 
the formulation, manufacturing, processing, packaging, labeling, advertising, 
distribution and sale of nutritional supplements.  These activities are also 
regulated by various governmental agencies for the states and localities in 
which the Company's products are sold, as well as by governmental agencies in 
certain foreign countries in which the Company's products are sold.  Among 
other matters, regulation of the Company by the FDA and FTC is concerned with 
claims made with respect to a product which refer to the value of the product 
in treating or preventing disease or other adverse health conditions.


                                      17

<PAGE>

RISKS SPECIFIC TO CRITICAL CARE NUTRITION PRODUCTS

     IF WE DO NOT INCREASE THE SALES VOLUME OF OUR CRITICAL CARE NUTRITION 
PRODUCTS, OUR BUSINESS AND FINANCIAL CONDITION MAY BE MATERIALLY ADVERSELY 
AFFECTED. 

     Increasing the sales of our critical care nutrition products is an 
important part of our business strategy.  If we are not successful in 
obtaining these sales increases, our business and financial condition may be 
materially adversely affected.  We acquired our current critical care enteral 
nutrition products from Nutrition Medical on December 23, 1998.  Our ability 
to increase sales levels of the acquired critical care enteral nutrition 
products will depend on our ability to successfully complete certain clinical 
marketing studies and on our ability to effectively execute our operating 
sales and marketing plans. We cannot be sure that we will succeed in 
increasing the sales of these products.

     IF OUR MARKETING EFFORTS DO NOT GENERATE THE NAME RECOGNITION FOR OUR 
COMPANY AND OUR CRITICAL CARE PRODUCTS NECESSARY TO SIGNIFICANTLY ENHANCE 
REVENUES, OUR BUSINESS AND FINANCIAL CONDITION MAY BE MATERIALLY ADVERSELY 
AFFECTED

     We cannot be sure that our marketing efforts will achieve the name 
recognition of our company and of our critical care nutrition products 
necessary to significantly enhance revenues.  If they do not, our business 
and financial condition could be materially adversely affected.  Our 
products, with the exception of Glutasorb, are designed to be substantially 
equivalent to existing branded competitive products.  Although we believe 
that the quality and efficacy of our critical care nutrition products are 
comparable to branded competitive products, no independent comparison between 
our critical care nutrition products and competitive products has been 
completed. We cannot be sure that the efficacy or quality of our critical 
care nutrition products is, or will be, comparable to branded competitive 
products.  Furthermore, our name and our products are relatively unknown to 
large segments of our target markets.  

     PRICE REDUCTIONS BY COMPETITORS COULD HAVE A MATERIAL ADVERSE EFFECT ON 
OUR BUSINESS AND FINANCIAL CONDITION.

     Much of our marketing strategy for our critical care nutrition products 
is focused on the price advantage of our critical care nutrition products.  
If a competitor reduces or eliminates the price advantage of our products, we 
cannot be sure that we will be able to compete successfully with the 
competitor, or operate profitably under such conditions.  If we could not, 
our business and financial condition could be materially adversely affected.  
We believe that the principal advantage of our critical care nutrition 
products, with the exception of Glutasorb, is cost effectiveness. Because 
these products were only recently acquired, we have not yet experienced any 
competitor lowering its prices to offset any price advantage we may have.  We 
are aware that while the products were owned by NMI, at least one competitor 
in the critical care nutrition products market lowered prices to various 
customers of some branded products to levels that offset all or part of the 
price advantage held by NMI.  We believe that any selective price reductions 
by a competitor may result in lost sales of our competing products.  

     IF THE CONTRACT MANUFACTURERS THAT PRODUCE OUR PRODUCTS CANNOT DO SO 
ADEQUATELY, OUR BUSINESS AND FINANCIAL CONDITION MAY BE MATERIALLY ADVERSELY 
AFFECTED

     We rely on contract manufacturers to produce our critical care nutrition 
products according to our specifications.  Any interruption in supply from 
these manufacturers of any of our products could have a material adverse 
effect on our business and financial condition. We cannot be sure that 
contract manufacturers will consistently supply adequate quantities of our 
products on a timely basis or that the quality of such products will be 
consistently maintained.  We also rely on these manufacturers to comply with 
all applicable government regulations and manufacturing guidelines.  We 
cannot be sure these contract manufacturers will consistently comply with 
government regulations.  In the event of a sale of a defective product, we 
would be 


                                      18

<PAGE>

exposed to product liability claims and could lose customer confidence.  In 
addition, minimum quantity order requirements imposed by manufacturers may 
result in excess inventory levels, requiring additional working capital and 
increasing exposure to losses from inventory obsolescence. 

     BECAUSE THE WAY WE DISTRIBUTE OUR PRODUCTS MAY RESULT IN A RELATIVELY 
SMALL NUMBER OF CUSTOMERS, THE LOSS OF PARTICULAR CUSTOMERS COULD HAVE A 
MATERIAL ADVERSE EFFECT ON OUR BUSINESS AND FINANCIAL CONDITION.

     Our critical care nutrition product sales may become concentrated with a 
few large distributors and certain customers.  We cannot be sure that orders 
from such customers will continue or that our future orders will not 
significantly decline, which could have a material adverse effect on our 
business and financial condition.

     WE MAY BECOME INVOLVED IN LITIGATION WITH COMPETITORS THAT MAY HAVE A 
MATERIAL ADVERSE EFFECT ON OUR BUSINESS AND FINANCIAL CONDITION. 

     Companies in the private label industry are commonly the subject of 
claims and lawsuits brought by brand name competitors alleging that the 
private label products have formulas, labeling or packaging similar to 
competing brand name products. Such litigation may require the commitment of 
substantial management time and legal fees.  Accordingly, such litigation may 
have a material adverse effect on our business and financial condition.  
Certain of the critical care nutrition products we acquired from Nutrition 
Medical were the subject of a lawsuit alleging patent infringement.  The suit 
was favorably resolved before we acquired the products.  Similar claims may 
be made against us by competitors in the future.  Competitors may also 
respond to our marketing strategy by more aggressively seeking patents on 
their products to limit our future product development efforts.  If similar 
infringement allegations are made against us in the future, some of our 
current and future products may need to be reformulated or repackaged in 
order for us to continue to market products that are comparable to 
competitors' patented products. We may be unable to effectively reformulate 
certain of our products.  Furthermore, we cannot be sure that a reformulated 
product would be viewed by customers to be essentially equivalent to the 
patented product. Moreover, we cannot be sure that any future lawsuits could 
be satisfactorily settled by reformulating, relabeling or repackaging a 
product.  

     DIRECT COMPETITION FROM LARGER COMPANIES WITH SIGNIFICANT FINANCIAL 
RESOURCES MAY HAVE A MATERIAL ADVERSE EFFECT ON OUR BUSINESS AND FINANCIAL 
CONDITION. 

     Our competitors in the critical care nutrition products market are 
established companies with significant financial resources that sell branded 
products that have achieved a high level of customer awareness. If we are not 
able to compete successfully or operate profitably in this market, our 
business and financial condition could be materially adversely affected. 
Other companies may also enter this market.

     IF WE CANNOT ENFORCE, FOR ANY REASON, THE TRADEMARKS THAT WE ACQUIRED 
FROM NUTRITION MEDICAL, OUR BUSINESS AND FINANCIAL CONDITION MAY BE 
MATERIALLY ADVERSELY AFFECTED.

     We cannot be sure that the trademarks we acquired from Nutrition Medical 
do not or will not violate the proprietary rights of others.  Nor can we be 
sure that our proprietary rights in the marks would be upheld if challenged.  
If we were prevented from using the marks for any reason, our business and 
financial condition may be materially adversely affected.  In addition, we 
cannot be sure that we will have the financial resources necessary to enforce 
or defend our trademarks, which could also have a material adverse effect on 
our business and financial condition.  We are in the process of registering 
existing trademarks for the products acquired from Nutrition Medical with the 
United States Patent & Trademark Office.  As part of Nutrition Medical, the 
products were not registered.  Instead Nutrition Medical relied on common law 
trademark rights. The lack of such registration may impair the ability of the 
Company to successfully register the trademarks or to prosecute successfully 
an infringement action against other users of these trademarks.


                                      19

<PAGE>

     OUR FAILURE TO OBTAIN NECESSARY APPROVALS OR OTHERWISE COMPLY WITH 
GOVERNMENT REGULATIONS COULD HAVE A MATERIAL ADVERSE EFFECT ON OUR BUSINESS 
AND FINANCIAL CONDITION.

     Our critical care products and potential critical care products are, or 
will be, subject to government regulation.  Our current products are 
regulated as food and medical food by the FDA and are subject to certain 
labeling requirements, current good manufacturing practice regulations and 
certain other regulations designed to ensure the safety of the products. 

     Our current and potential products may become subject to further 
governmental regulation in the future.  The burden of such regulation could 
add materially to the costs and risks of our development and marketing 
efforts. There can be no assurance that we could obtain the required 
approvals or comply with new regulations if our products are subject to 
additional governmental regulation in the future.  

     Claims we make in labeling and advertising our products are subject to 
regulation by the FDA, the FTC and various state agencies under their general 
authority to prevent false, misleading and deceptive trade practices.  These 
regulations involve stringent tracking, testing and documentation standards. 
Failure to comply with such requirements can result in adverse regulatory 
action, including injunctions, civil or criminal penalties, product recalls 
or the relabeling, reformulation or possible termination of certain products. 


                                      20


<PAGE>

ITEM 2.   PROPERTIES

     The Company leases approximately 5,500 square feet of administrative, 
laboratory,  and manufacturing space at the Land O'Lakes corporate office 
located in Arden Hills, Minnesota.   In addition, the Company rents, on an 
as-needed basis, public warehouse space to store inventory.  Management 
believes that the Company's facilities are suitable and adequate for current 
office, research, manufacturing and storage requirements.

ITEM 3.   LEGAL PROCEEDINGS

     The Company is not a party to any material legal proceeding.

ITEM 4.   SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

     None.

ITEM X.   EXECUTIVE OFFICERS OF REGISTRANT

     The executive officers of the Company are: 

<TABLE>
<CAPTION>

NAME                            AGE                  POSITION
- ----                            ---                  --------
<S>                             <C>      <C>
Robert A. Hoerr, M.D., Ph.D.     49      Chairman of the Board of Directors
                                         and Chief Executive Officer
Henry J. Cardello                47      President and Director
Eileen F. Bostwick, Ph.D.        48      Vice President, Research and
                                         Development
Michael E. Cady                  46      Vice President, Manufacturing and
                                         Engineering
Gregg A. Waldon                  38      Vice President, Chief Financial
                                         Officer, Secretary and Treasurer
</TABLE>

     ROBERT A. HOERR, M.D., PH.D., was named President and Chief Operating 
Officer of the Company in February 1994, became President and Chief Executive 
Officer in September 1994 and became Chairman of the Board and Chief 
Executive Officer in November 1998. He served as Vice President, Medical and 
Regulatory Affairs of the Company from January 1993 to December 1993 and 
Senior Vice President from December 1993 to February 1994. Dr. Hoerr was 
Director of Medical Affairs for Sandoz Nutrition Corporation, a 
research-based nutrition company, from March 1990 to January 1993. From 1986 
to 1990, Dr. Hoerr was Research Scientist and Assistant Program Director at 
the Clinical Research Center, Massachusetts Institute of Technology ("MIT"). 
Dr. Hoerr received his A.B. in Biology from Indiana University, his M.D. from 
Indiana University School of Medicine and his Ph.D. in Nutritional 
Biochemistry and Metabolism from MIT. 

     HENRY J. CARDELLO, has served as President since January 1999. Mr. 
Cardello has been advising the Company since April 1998 through Marketing 
Ventures of America, Inc. ("MVA"), a consumer-marketing firm that specializes 
in commercializing consumer-based products, of which he has been Chairman and 
President since July 1987.  Prior to July 1987, Mr. Cardello was President of 
Sunkist Soft Drinks, Inc., a unit of Cadbury Schweppes, Vice President of 
Marketing for Cadbury's Canada Dry business and Director of Marketing for 
Coca-Cola USA.   Additionally, Mr. Cardello has held several brand management 
positions with Anheuser-Busch and General Mills, Inc. Mr. Cardello received 
his B.S. degree in engineering from Lehigh University and his M.B.A. from The 
Wharton Graduate School of Business.

     EILEEN F. BOSTWICK, PH.D., has served as Manager of Research and 
Development since July 1992, Director of Research and Development since 
September 1993 and Vice President of Research and Development since March 
1997. Dr. Bostwick joined the Company's predecessor, Procor Technologies, 
Inc. ("Procor") in 1988 as Immunology Group Leader. Prior thereto, Dr. 
Bostwick was a Senior Immunologist in the Biotechnology Section at Minnesota 
Mining & Manufacturing. Dr. Bostwick received her B.S. and M.S. degrees from 
Michigan State University in Dairy Science, and her Ph.D. in immunology and 
physiology from the University of Minnesota. 


                                      21

<PAGE>

     MICHAEL E. CADY has served as Vice President, Manufacturing and 
Engineering of the Company since July 1992.  From January 1988 to July 1992, 
Mr. Cady served as Director of Operations for Procor.  From 1979 to 1988, Mr. 
Cady held engineering and planning positions within several operating groups 
at Land O'Lakes.  Mr. Cady was a member of the Land O'Lakes group that 
evaluated and implemented the polyclonal antibody technology used as a basis 
for the Company's manufacturing process.  Prior to joining Land O'Lakes Mr. 
Cady was an engineer at Swift & Company, a food processing company.  Mr. Cady 
received his B.S. in Engineering from the University of Iowa and earned his 
M.B.A. from the University of St. Thomas in 1985. 

     GREGG A. WALDON served as Controller of the Company from April 1992 to 
September 1992, and was elected Treasurer in September 1992, Secretary in 
March 1993, Vice President in December 1993 and Chief Financial Officer in 
November 1994. From April 1989 to April 1992, Mr. Waldon served as an Audit 
Manager with Price Waterhouse LLP, a public accounting firm, in its Middle 
Market and Emerging Growth Practice in Minneapolis, Minnesota and from 1986 
to 1989 was Senior/Staff accountant with Price Waterhouse. Mr. Waldon is 
resigning from the Company effective March 31, 1999.

     Officers of the Company are chosen by and serve at the discretion of the 
Board of Directors.  There are no family relationships among any of the 
directors, officers or key employees of the Company. 


                                      22

<PAGE>

                                    PART II

ITEM 5.   MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER 
          MATTERS

     Incorporated herein by reference is the information appearing under the 
heading "Market For Registrant's Common Equity and Related Stockholder 
Matters" in the Company's Annual Report to Stockholders for the year ended 
December 31, 1998 (the "1998 Annual Report").

ITEM 6.   SELECTED FINANCIAL DATA

     Incorporated herein by reference is the information appearing under the 
heading "Selected Financial Data" in the 1998 Annual Report.

ITEM 7.   MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND     
          RESULTS OF OPERATIONS

     Incorporated herein by reference is the information appearing under the 
heading "Management's Discussion and Analysis of Financial Condition and 
Results of Operations" in the 1998 Annual Report.

ITEM 7a.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
     
     Incorporated herein by reference is the information appearing under the 
heading "Quantitative and Qualitative Disclosures About Market Risk" in the 
1998 Annual Report.
     
ITEM 8.   FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

     Incorporated herein by reference is the information appearing under the 
headings "Balance Sheets", "Statements of Operations", "Statement of Changes 
in Stockholders' Equity", "Statements of Cash Flows", "Notes to Financial 
Statements" and "Report of Independent Auditors" in the 1998 Annual Report.

ITEM 9.   CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND     
          FINANCIAL DISCLOSURE

     None.

                                    PART III

ITEM 10.  DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

     Incorporated herein by reference is the information appearing under the 
headings "Election of Directors" and "Section 16(a) Beneficial Ownership 
Reporting Compliance" in the Company's definitive Proxy Statement for the 
annual meeting of stockholders to be held on May 12, 1999 (the "Proxy 
Statement").  See also Part I hereof under the heading "Item X. Executive 
Officers of Registrant".

ITEM 11.  EXECUTIVE COMPENSATION

     Incorporated herein by reference is the information appearing under the 
headings "Report of the Compensation Committee", "Executive Compensation" and 
"Comparative Stock Performance" in the Company's Proxy Statement.

ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

     Incorporated herein by reference is the information appearing under the 
heading "Security Ownership of Principal Stockholders and Management" in the 
Company's Proxy Statement.


                                      23

<PAGE>

ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

     Incorporated herein by reference is the information appearing under the 
heading "Certain Relationships and Related Transactions" in the Company's 
Proxy Statement.




                                      24

<PAGE>

                                   PART IV
                                          
ITEM 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K

(a)  Documents filed as part of this report:

     1.   Financial Statements:

               The consolidated financial statements of the Company are 
          incorporated herein by reference from the information appearing under 
          the headings "Balance Sheets", "Statements of Operations", "Statement 
          of Changes in Stockholders' Equity", "Statements of Cash Flows", 
          "Notes to Financial Statements" and "Report of Independent Auditors" 
          in the 1998 Annual Report.

     2.   Financial Statement Schedules:

               The following consolidated financial statement schedules of the
          Company are included in Item 14(d):

               Schedule II    Valuation and Qualifying Accounts

(b)  Reports on Form 8-K

               The Company filed a report on 8K, dated December 23, 1998,
          relating to the purchase of certain critical care enteral products,
          related inventory and certain fixed assets from NMI.
 
(c)  Exhibits:

     The following exhibits are filed as part of this Annual Report on Form 
10-K for the year ended December 31, 1998.   

<TABLE>
<CAPTION>

 EXHIBIT NO.         DESCRIPTION                                                    METHOD OF FILING
 -----------         -----------                                                    ----------------
 <C>                 <S>                                                            <C>
       3.2           Restated Certificate of Incorporation of the                   Incorporated By 
                     Company.(3)                                                    Reference
                     
       3.4           Restated Bylaws of the Company.(1)                             Incorporated By 
                                                                                    Reference

       4.1           Specimen Common Stock Certificate.(1)                          Incorporated By 
                                                                                    Reference

       4.6           Form of Common Stock Warrant to purchase shares of             Incorporated By 
                     Common Stock of the Company, issued in connection with         Reference
                     the sale of Convertible Promissory Notes.(1)
                     
       4.7           Warrant to purchase 17,144 shares of Series F-1                Incorporated By 
                     Convertible Preferred Stock of the Company issued to           Reference
                     Chiron Corporation, dated March 29, 1995.(1)
                     
       4.8           Warrant to purchase 42,856 shares of Series F-2                Incorporated By 
                     Convertible Preferred Stock of the Company issued to           Reference
                     Chiron Corporation, dated March 29, 1995.(1)
                     
       4.9           Warrant to purchase 60,000 shares of Series F-3                Incorporated By 
                     Convertible Preferred Stock of the Company issued to           Reference
                     Chiron Corporation, dated March 29, 1995.(1)
                     
      4.10           Warrant to purchase 80,000 shares of Series F-3                Incorporated By 
                     Convertible Preferred Stock of the Company issued to           Reference
                     Chiron Corporation, 
</TABLE>


                                      25

<PAGE>

<TABLE>
<CAPTION>

 EXHIBIT NO.         DESCRIPTION                                                    METHOD OF FILING
 -----------         -----------                                                    ----------------
 <C>                 <S>                                                            <C>
                     dated March 29, 1995.(1)

      4.11           Warrant to purchase 18,250 shares of Common Stock of           Incorporated By 
                     the Company issued to IAI Investment Funds VI, Inc.            Reference
                     (IAI Emerging Growth Fund), dated January 30, 1996.(1)
                     
      4.12           Warrant to purchase 6,250 shares of Common Stock of the        Incorporated By 
                     Company issued to IAI Investment Funds IV, Inc. (IAI           Reference
                     Regional Fund), dated January 30, 1996.(1)
                     
      4.13           Warrant to purchase 25,000 shares of Common Stock of           Incorporated By 
                     the Company issued to John Pappajohn, dated February 2,        Reference
                     1996.(1)
                     
      4.14           Warrant to purchase 25,000 shares of Common Stock of           Incorporated By 
                     the Company issued to Edgewater Private Equity Fund,           Reference
                     L.P., dated February 2, 1996.(1)
                     
      4.15           Warrant to purchase 10,000 shares of Common Stock of           Incorporated By 
                     the Company issued to Joseph Giamenco, dated                   Reference
                     February 2, 1996.(1)
                     
      4.16           Warrant to purchase 25,000 shares of Common Stock of           Incorporated By 
                     the Company issued to Gus A. Chafoulias, dated                 Reference
                     February 2, 1996.(1)
                     
      4.17           Warrant to purchase 25,000 shares of Common Stock of           Incorporated By 
                     the Company issued to JIBS Equities, dated February 2,         Reference
                     1996.(1)
                     
      4.18           Warrant to purchase 25,000 shares of Common Stock of           Incorporated By 
                     the Company issued to Land O'Lakes, Inc., dated                Reference
                     February 2, 1996.(1)
                     
      4.19           6% Convertible Debenture Purchase Agreement dated              Incorporated By 
                     November 18, 1997 among the Company and the Purchasers         Reference
                     named therein.(8)
                     
      4.20           Registration Rights Agreement dated November 18, 1997          Incorporated By 
                     among the Company and the Holders named therein.(9)            Reference
                     
      4.21           6% Convertible Debenture due May 18, 1999 issued to CPR        Incorporated By 
                     (USA) Inc. dated November 18, 1997.(10)                        Reference
                     
      4.22           6% Convertible Debenture due May 18, 1999 issued to            Incorporated By 
                     Libertyview Plus Fund dated November 18, 1997.(11)             Reference
                     
      4.23           6% Convertible Debenture due May 18, 1999 issued to            Incorporated By 
                     Libertyview Fund, LLC dated November 18, 1997.(12)             Reference
                     
      4.24           Stock Purchase Warrant issued to CPR (USA) Inc. dated          Incorporated By 
                     November 18, 1997.(13)                                         Reference
                     
      4.25           Stock Purchase Warrant issued to Libertyview Plus Fund         Incorporated By 
                     dated November 18, 1997.(14)                                   Reference
                     
      4.26           Stock Purchase Warrant issued to Libertyview Fund, LLC         Incorporated By 
                     dated November 18, 1997.(15)                                   Reference
                     
      4.27           Warrant issued to CLARCO Holdings dated as of                  Incorporated By 
                     December 1,1997.(16)                                           Reference
</TABLE>


                                      26

<PAGE>

<TABLE>
<CAPTION>

 EXHIBIT NO.         DESCRIPTION                                                    METHOD OF FILING
 -----------         -----------                                                    ----------------
 <C>                 <S>                                                            <C>
      4.28           Warrant issued to CLARCO Holdings dated as of                  Incorporated By 
                     December 1,1997.(17)                                           Reference

      4.29           Warrant issued to CLARCO Holdings dated as of                  Incorporated By 
                     December 1,1997.(18)                                           Reference

      4.30           Warrant issued to Henry J. Cardello dated as of April          Incorporated By 
                     13, 1998.(20)                                                  Reference
                     
      4.31           Warrant issued to Henry J. Cardello dated as of April          Incorporated By 
                     30, 1998.(20)                                                  Reference
                     
      4.32           Warrant issued to Henry J. Cardello dated as of June 19,       Incorporated By 
                     1998.(20)                                                      Reference
                     
      4.33           Warrant issued to William Young and Rebecca Young dated        Electronic  
                     as of August 12, 1998.                                         Transmission

      4.34           Warrant issued to Henry J. Cardello dated as of                Electronic  
                     September 30, 1998.                                            Transmission

      4.35           Warrant issued to American Home Products Corporation           Electronic  
                     dated as of October 15, 1998.                                  Transmission

     #10.1           License Agreement between the Company and Land O'Lakes         Incorporated By 
                     dated May 7, 1992.(1)                                          Reference
                     
     #10.2           Royalty Agreement between the Company and Land O'Lakes         Incorporated By 
                     dated May 7, 1992.(1)                                          Reference
                     
     #10.3           Supply Agreement between the Company and Land O'Lakes          Incorporated By 
                     dated May 7, 1992.(1)                                          Reference
                     
      10.4           Master Services Agreement between the Company and Land         Incorporated By 
                     O'Lakes dated May 7, 1992.(1)                                  Reference
                     
     *10.5           GalaGen Inc. 1992 Stock Plan, as amended.(5)                   Incorporated By 
                                                                                    Reference

      10.7           Stock and Warrant Purchase Agreement between the Company       Incorporated By 
                     and Chiron Corporation dated March 20, 1995.(1)                Reference

     #10.8           License and Collaboration Agreement between the Company        Incorporated By 
                     and Chiron Corporation dated March 20, 1995.(1)                Reference

     *10.9           GalaGen Inc. Employee Stock Purchase Plan, as amended.(2)      Incorporated By 
                                                                                    Reference

      10.10          Credit Agreement between the Company and Norwest Bank          Incorporated By 
                     Minnesota, N.A., dated as of January 24, 1996.(1)              Reference

      10.11          Commitment Letter between the Company and Cargill              Incorporated By 
                     Leasing Corporation, dated June 5, 1996.(2)                    Reference
                                                                                    
      10.12          Master Equipment Lease between the Company and Cargill         Incorporated By 
                     Leasing Corporation, dated June 6, 1996.(2)                    Reference
                                                                                    
      10.13          Agreement for Progress Payments between the Company and        Incorporated By 
                     Cargill Leasing Corporation, dated June 6, 1996.(2)            Reference
                                                                                    
</TABLE>


                                      27

<PAGE>

<TABLE>
<CAPTION>

 EXHIBIT NO.         DESCRIPTION                                                    METHOD OF FILING
 -----------         -----------                                                    ----------------
 <C>                 <S>                                                            <C>
      10.14          Agreement for Lease between the Company and Land               Incorporated By 
                     O'Lakes, dated June 3, 1996.(2)                                Reference

     *10.15          Letter agreement with John G. Watson dated September 14,       Incorporated By 
                     1996.(3)                                                       Reference

     #10.16          Agreement with Colorado Animal Research Enterprises,           Incorporated By 
                     Inc. dated November 1, 1996.(4)                                Reference
                                                                                    
     *10.17          Letter agreement with Francois Lebel, M.D., dated              Incorporated By 
                     December 27, 1996.(4)                                          Reference
                                                                                    
     *10.18          Consulting agreement with Stanley Falkow, Ph.D., dated         Incorporated By 
                     January 15, 1997.(4)                                           Reference

     *10.19          GalaGen Inc. Annual Short Term Incentive Cash                  Incorporated By 
                     Compensation Plan.(4)                                          Reference

     *10.20          GalaGen Inc. Annual Long Term Incentive Stock Option           Incorporated By 
                     Compensation Plan.(4)                                          Reference

     *10.21          GalaGen Inc. 1997 Incentive Plan.(6)                           Incorporated By 
                                                                                    Reference

      10.22          Master Loan and Security Agreement with TransAmerica           Incorporated By 
                     Business Credit Corporation dated June 8, 1997.(7)             Reference

      10.23          Amended and Restated License Agreement between the             Incorporated By 
                     Company and Land O'Lakes dated March 11, 1998.(19)             Reference 

     #10.24          License Agreement between the Company and Metagenics,          Incorporated By 
                     Inc. dated April 7, 1998.(20)                                  Reference 
                     
      10.25          Marketing Agreement between the Company and Nutrition          Incorporated By 
                     Medical, Inc., dated September 1, 1998.(21)                    Reference
                     
      10.26          Asset Purchase Agreement between the Company and               Incorporated By 
                     Nutrition Medical, Inc., dated  September 1, 1998.(21)         Reference
                     
     *10.27          Letter agreement with John G. Watson dated September 16,       Incorporated By 
                     1998.(21)                                                      Reference

      10.28          Asset Purchase Agreement Amendment 1 between the Company       Incorporated By 
                     and Nutrition Medical, Inc., dated  October 28,                Reference
                     1998.(22)
                     
      10.29          Asset Purchase Agreement Amendment 2 between the Company       Incorporated By 
                     and Nutrition Medical, Inc., dated  December 23,               Reference
                     1998.(23)
                     
    ##10.30          Collaboration and License Agreement between the Company        Electronic  
                     and American Home Products Corporation acting through          Transmission
                     its Wyeth-Ayerst Laboratories Division, dated October
                     15, 1998
                     
    ##10.31          Manufacturing and Supply Agreement between the Company         Electronic  
                     and American Home Products Corporation acting through          Transmission
                     its Wyeth-Ayerst Laboratories Division dated October 15,
                     1998.
                     
    ##10.32          Product Development Collaboration, Manufacturing and           Electronic  
                     Supply, and Retail Marketing Agreement between the             Transmission
                     Company and 
</TABLE>


                                      28

<PAGE>


<TABLE>
<CAPTION>

 EXHIBIT NO.         DESCRIPTION                                                    METHOD OF FILING
 -----------         -----------                                                    ----------------
 <C>                 <S>                                                            <C>
                     General Nutrition Corporation, dated December 22, 1998

      11.1           Statement re: computation of per share earnings (loss).        Electronic  
                                                                                    Transmission

      13.1           1998 Annual Report to Stockholders                             Electronic 
                                                                                    Transmission

      23.1           Consent of Ernst & Young LLP.                                  Electronic 
                                                                                    Transmission

      27.1           Financial Data Schedule for Year Ended December 31,            Electronic 
                     1998.                                                          Transmission

      27.2           Restated Financial Data Schedule for Quarter ended March       Incorporated By 
                     31, 1996.(19)                                                  Reference
</TABLE>

     (1)  Incorporated herein by reference to the same numbered Exhibit to the
          Company's Registration Statement on Form S-1 (Registration No.
          333-1032).
     
     (2)  Incorporated herein by reference to the same numbered Exhibit to the
          Company's Quarterly Report on Form 10-Q for the quarterly period ended
          June 30, 1996 (File No. 0-27976).
     
     (3)  Incorporated herein by reference to the same numbered Exhibit to the
          Company's Quarterly Report on Form 10-Q for the quarterly period ended
          September 30, 1996 (File No. 0-27976).
     
     (4)  Incorporated herein by reference to the same numbered Exhibit to the
          Company's Annual Report on Form 10-K for the period ended December 31,
          1996 (File No. 0-27976).

     (5)  Incorporated herein by reference to the same numbered Exhibit to the
          Company's Quarterly Report on Form 10-Q for the quarterly period ended
          March 31, 1997 (File No. 0-27976).
     
     (6)  Incorporated herein by reference to Appendix A to the Company's 1997
          Definitive Proxy Statement on Schedule 14A (File No. 0-27976).
     
     (7)  Incorporated herein by reference to the same numbered Exhibit to the
          Company's Quarterly Report on Form 10-Q for the quarterly period ended
          June 30, 1997 (File No. 0-27976).
     
     (8)  Incorporated herein by reference to Exhibit No. 4.4 to the Company's
          Registration Statement on Form S-3 (Registration No. 333-41151).
     
     (9)  Incorporated herein by reference to Exhibit No. 4.5 to the Company's
          Registration Statement on Form S-3 (Registration No. 333-41151).
     
     (10) Incorporated herein by reference to Exhibit No. 4.6 to the Company's
          Registration Statement on Form S-3 (Registration No. 333-41151).
     
     (11) Incorporated herein by reference to Exhibit No. 4.7 to the Company's
          Registration Statement on Form S-3 (Registration No. 333-41151).
     
     (12) Incorporated herein by reference to Exhibit No. 4.8 to the Company's
          Registration Statement on Form S-3 (Registration No. 333-41151).
     
     (13) Incorporated herein by reference to Exhibit No. 4.9 to the Company's
          Registration Statement on Form S-3 (Registration No. 333-41151).
     
     (14) Incorporated herein by reference to Exhibit No. 4.10 to the Company's
          Registration Statement on Form S-3(Registration No. 333-41151).


                                      29

<PAGE>

     (15) Incorporated herein by reference to Exhibit No. 4.11 to the Company's
          Registration Statement on Form S-3 (Registration No. 333-41151).
     
     (16) Incorporated herein by reference to Exhibit No. 4.12 to Amendment No.
          1 to the Company's Registration Statement on Form S-3 (Registration
          No. 333-41151).
     
     (17) Incorporated herein by reference to Exhibit No. 4.13 to Amendment No.
          1 to the Company's Registration Statement on Form S-3 (Registration
          No. 333-41151).
     
     (18) Incorporated herein by reference to Exhibit No. 4.14 to Amendment No.
          1 to the Company's Registration Statement on Form S-3 (Registration
          No. 333-41151).
          
     (19) Incorporated herein by reference to the same numbered Exhibit to the
          Company's Annual Report on Form 10-K for the period ended December 31,
          1997 (File No. 0-27976).    

     (20) Incorporated herein by reference to the same numbered Exhibit to the
          Company's Quarterly Report on Form 10-Q for the period ended June 30,
          1998 (File No. 0-27976).

     (21) Incorporated herein by reference to the same numbered Exhibit to the
          Company's Quarterly Report on Form 10-Q for the period ended September
          30, 1998 (File No. 0-27976).

     (22) Incorporated herein by reference to Exhibit No. 2.2 to the Company's
          Report on Form 8-K, dated December 23, 1998 (File No. 0-27976).

     (23) Incorporated herein by reference to Exhibit No. 2.3 to the Company's
          Report on Form 8-K, dated December 23, 1998 (File No. 0-27976).
     
      *   Management contract or compensatory plan or arrangement required to be
          filed as an exhibit to this Form 10-K.  
     
      #   Contains portions for which confidential treatment has been granted
          to the Company.

      ##  Contains portions of which confidential treatment has been applied
          for by the Company.


(d)  Valuation and Qualifying Accounts:

<TABLE>
<CAPTION>
                                                      Balance at       Charged to                     Balance at end
                                                     beginning of      Costs and                         of period
                                                        period          Expenses      Deductions
     <S>                                             <C>               <C>            <C>             <C>
     Year Ended December 31, 1998:
     Allowance for returns and doubtful accounts           -               $14,020           -               $14,020
                                                      -----------      -----------    ----------      --------------
                                            Total          -               $14,020           -               $14,020
                                                      -----------      -----------    ----------      --------------
     Year Ended December 31, 1997:
                                            Total          -                     -           -                     -
                                                      -----------      -----------    ----------      --------------
     Year Ended December 31, 1996:
                                            Total          -                     -           -                     -
                                                      -----------      -----------    ----------      --------------
</TABLE>


                                      30

<PAGE>

SIGNATURES

         Pursuant to the requirements of Section 13 or 15(d) of the 
Securities Exchange Act of 1934, the Registrant has duly caused this report 
to be signed on its behalf by the undersigned thereunto duly authorized, on 
March 31, 1999.

                          GALAGEN INC.


                          By    /s/ Robert A. Hoerr                            
                              -----------------------------------
                              Robert A. Hoerr, M.D., Ph.D.
                              Chief Executive Officer

         Pursuant to the requirements of the Securities Exchange Act of 1934,
this report has been signed below by the following persons on behalf of the
Registrant and in the capacities indicated on March 31, 1999.



                            /s/ Robert A. Hoerr
                          -----------------------------------------------------
                          Robert A. Hoerr, Chairman and Chief Executive Officer
                          (Principal Executive Officer) and Director


                            /s/ Gregg A. Waldon
                          -----------------------------------------------------
                          Gregg A. Waldon, Vice President, Chief Financial
                          Officer, Treasurer and Secretary (Principal Financial
                          Officer and Principal Accounting Officer)


                            /s/ Henry J. Cardello
                          -----------------------------------------------------
                          Henry J. Cardello, President and Director


                            /s/ Ronald O. Ostby
                          -----------------------------------------------------
                          Ronald O. Ostby, Director


                            /s/ R. David Spreng
                          -----------------------------------------------------
                          R. David Spreng, Director


                            /s/ Winston R. Wallin
                          -----------------------------------------------------
                          Winston R. Wallin, Director


                                      31

<PAGE>

                                EXHIBIT INDEX
                                          
<TABLE>
<CAPTION>

 EXHIBIT NO.           DESCRIPTION                                                    METHOD OF FILING
 -----------           -----------                                                    ----------------
 <C>                   <S>                                                            <C>
       3.2             Restated Certificate of Incorporation of the Company.(3)       Incorporated By 
                                                                                      Reference

       3.4             Restated Bylaws of the Company.(1)                             Incorporated By 
                                                                                      Reference

       4.1             Specimen Common Stock Certificate.(1)                          Incorporated By 
                                                                                      Reference

       4.6             Form of Common Stock Warrant to purchase shares of Common      Incorporated By 
                       Stock of the Company, issued in connection with the sale       Reference
                       of Convertible Promissory Notes.(1)
                       
       4.7             Warrant to purchase 17,144 shares of Series F-1                Incorporated By 
                       Convertible Preferred Stock of the Company issued to           Reference
                       Chiron Corporation, dated March 29, 1995.(1)
                       
       4.8             Warrant to purchase 42,856 shares of Series F-2                Incorporated By 
                       Convertible Preferred Stock of the Company issued to           Reference
                       Chiron Corporation, dated March 29, 1995.(1)
                       
       4.9             Warrant to purchase 60,000 shares of Series F-3                Incorporated By 
                       Convertible Preferred Stock of the Company issued to           Reference
                       Chiron Corporation, dated March 29, 1995.(1)
                       
       4.10            Warrant to purchase 80,000 shares of Series F-3                Incorporated By 
                       Convertible Preferred Stock of the Company issued to           Reference
                       Chiron Corporation, dated March 29, 1995.(1)
                       
       4.11            Warrant to purchase 18,250 shares of Common Stock of the       Incorporated By 
                       Company issued to IAI Investment Funds VI, Inc. (IAI           Reference
                       Emerging Growth Fund), dated January 30, 1996.(1)
                       
       4.12            Warrant to purchase 6,250 shares of Common Stock of the        Incorporated By 
                       Company issued to IAI Investment Funds IV, Inc. (IAI           Reference
                       Regional Fund), dated January 30, 1996.(1)
                       
       4.13            Warrant to purchase 25,000 shares of Common Stock of the       Incorporated By 
                       Company issued to John Pappajohn, dated February 2,            Reference
                       1996.(1)
                       
       4.14            Warrant to purchase 25,000 shares of Common Stock of the       Incorporated By 
                       Company issued to Edgewater Private Equity Fund, L.P.,         Reference
                       dated February 2, 1996.(1)
                       
       4.15            Warrant to purchase 10,000 shares of Common Stock of the       Incorporated By 
                       Company issued to Joseph Giamenco, dated February 2,           Reference
                       1996.(1)
                       
       4.16            Warrant to purchase 25,000 shares of Common Stock of the       Incorporated By 
                       Company issued to Gus A. Chafoulias, dated February 2,         Reference
                       1996.(1)
                       
       4.17            Warrant to purchase 25,000 shares of Common Stock of the       Incorporated By 
                       Company issued to JIBS Equities, dated February 2,             Reference
                       1996.(1)
                       
       4.18            Warrant to purchase 25,000 shares of Common Stock of the       Incorporated By 
                       Company issued to Land O'Lakes, Inc., dated February 2,        Reference
                       1996.(1)
</TABLE>

<PAGE>

<TABLE>
<CAPTION>

 EXHIBIT NO.           DESCRIPTION                                                    METHOD OF FILING
 -----------           -----------                                                    ----------------
 <C>                   <S>                                                            <C>
       4.19            6% Convertible Debenture Purchase Agreement dated              Incorporated By 
                       November 18, 1997 among the Company and the Purchasers         Reference
                       named therein.(8)
                       
       4.20            Registration Rights Agreement dated November 18, 1997          Incorporated By 
                       among the Company and the Holders named therein.(9)            Reference
                       
       4.21            6% Convertible Debenture due May 18, 1999 issued to CPR        Incorporated By 
                       (USA) Inc. dated November 18, 1997.(10)                        Reference
                       
       4.22            6% Convertible Debenture due May 18, 1999 issued to            Incorporated By 
                       Libertyview Plus Fund dated November 18, 1997.(11)             Reference
                       
       4.23            6% Convertible Debenture due May 18, 1999 issued to            Incorporated By 
                       Libertyview Fund, LLC dated November 18, 1997.(12)             Reference
                       
       4.24            Stock Purchase Warrant issued to CPR (USA) Inc. dated          Incorporated By 
                       November 18, 1997.(13)                                         Reference
                       
       4.25            Stock Purchase Warrant issued to Libertyview Plus Fund         Incorporated By 
                       dated November 18, 1997.(14)                                   Reference
                       
       4.26            Stock Purchase Warrant issued to Libertyview Fund, LLC         Incorporated By 
                       dated November 18, 1997.(15)                                   Reference
                       
       4.27            Warrant issued to CLARCO Holdings dated as of                  Incorporated By 
                       December 1,1997.(16)                                           Reference
                       
       4.28            Warrant issued to CLARCO Holdings dated as of                  Incorporated By 
                       December 1,1997.(17)                                           Reference
                       
       4.29            Warrant issued to CLARCO Holdings dated as of                  Incorporated By 
                       December 1,1997.(18)                                           Reference
                       
       4.30            Warrant issued to Henry J. Cardello dated as of April 13,      Incorporated By 
                       1998. (20)                                                     Reference
                       
       4.31            Warrant issued to Henry J. Cardello dated as of April 30,      Incorporated By 
                       1998. (20)                                                     Reference
                       
       4.32            Warrant issued to Henry J. Cardello dated as of June 19,       Incorporated By 
                       1998. (20)                                                     Reference
                       
       4.33            Warrant issued to William Young and Rebecca Young dated        Electronic  
                       as of August 12, 1998.                                         Transmission

       4.34            Warrant issued to Henry J. Cardello dated as of September      Electronic  
                       30, 1998.                                                      Transmission

       4.35            Warrant issued to American Home Products Corporation           Electronic  
                       dated as of October 15, 1998.                                  Transmission

      #10.1            License Agreement between the Company and Land O'Lakes         Incorporated By 
                       dated May 7, 1992.(1)                                          Reference

      #10.2            Royalty Agreement between the Company and Land O'Lakes         Incorporated By 
                       dated May 7, 1992.(1)                                          Reference
</TABLE>

<PAGE>

<TABLE>
<CAPTION>

 EXHIBIT NO.           DESCRIPTION                                                    METHOD OF FILING
 -----------           -----------                                                    ----------------
 <C>                   <S>                                                            <C>
      #10.3            Supply Agreement between the Company and Land O'Lakes          Incorporated By 
                       dated May 7, 1992.(1)                                          Reference
                       
       10.4            Master Services Agreement between the Company and Land         Incorporated By 
                       O'Lakes dated May 7, 1992.(1)                                  Reference
                       
      *10.5            GalaGen Inc. 1992 Stock Plan, as amended. (5)                  Incorporated By 
                                                                                      Reference

       10.7            Stock and Warrant Purchase Agreement between the Company       Incorporated By 
                       and Chiron Corporation dated March 20, 1995.(1)                Reference

      #10.8            License and Collaboration Agreement between the Company        Incorporated By 
                       and Chiron Corporation dated March 20, 1995.(1)                Reference

      *10.9            GalaGen Inc. Employee Stock Purchase Plan, as amended.(2)      Incorporated By 
                                                                                      Reference

      10.10            Credit Agreement between the Company and Norwest Bank          Incorporated By 
                       Minnesota, N.A., dated as of January 24, 1996.(1)              Reference

      10.11            Commitment Letter between the Company and Cargill Leasing      Incorporated By 
                       Corporation, dated June 5, 1996. (2)                           Reference
                                                                                      
      10.12            Master Equipment Lease between the Company and Cargill         Incorporated By 
                       Leasing Corporation, dated June 6, 1996. (2)                   Reference
                                                                                      
      10.13            Agreement for Progress Payments between the Company and        Incorporated By
                       Cargill Leasing Corporation, dated June 6, 1996. (2)           Reference
                                                                                      
      10.14            Agreement for Lease between the Company and Land O'Lakes,      Incorporated By
                       dated June 3, 1996. (2)                                        Reference
                                                                                      
      *10.15           Letter agreement with John G. Watson dated September 14,       Incorporated By
                       1996. (3)                                                      Reference
                                                                                      
      #10.16           Agreement with Colorado Animal Research Enterprises, Inc.      Incorporated By
                       dated November 1, 1996. (4)                                    Reference
                                                                                      
      *10.17           Letter agreement with Francois Lebel, M.D., dated              Incorporated By
                       December 27, 1996. (4)                                         Reference
                                                                                      
      *10.18           Consulting agreement with Stanley Falkow, Ph.D., dated         Incorporated By
                       January 15, 1997. (4)                                          Reference
                                                                                      
      *10.19           GalaGen Inc. Annual Short Term Incentive Cash                  Incorporated By
                       Compensation Plan. (4)                                         Reference
                                                                                      
      *10.20           GalaGen Inc. Annual Long Term Incentive Stock Option           Incorporated By
                       Compensation Plan. (4)                                         Reference
                                                                                      
      *10.21           GalaGen Inc. 1997 Incentive Plan. (6)                          Incorporated By
                                                                                      Reference
                                                                                      
      10.22            Master Loan and Security Agreement with TransAmerica           Incorporated By
                       Business Credit Corporation dated June 8, 1997. (7)            Reference
</TABLE>

<PAGE>

<TABLE>
<CAPTION>

 EXHIBIT NO.           DESCRIPTION                                                    METHOD OF FILING
 -----------           -----------                                                    ----------------
 <C>                   <S>                                                            <C>
      10.23            Amended and Restated License Agreement between the             Incorporated By
                       Company and Land O'Lakes dated March 11, 1998. (19)            Reference 
                       
     #10.24            License Agreement between the Company and Metagenics,          Incorporated By
                       Inc. dated April 7, 1998. (20)                                 Reference 
                       
      10.25            Marketing Agreement between the Company and Nutrition          Incorporated By
                       Medical, Inc., dated September 1, 1998. (21)                   Reference
                       
      10.26            Asset Purchase Agreement between the Company and               Incorporated By
                       Nutrition Medical, Inc., dated  September 1, 1998.(21)         Reference
                       
      *10.27           Letter agreement with John G. Watson dated September 16,       Incorporated By
                       1998.(21)                                                      Reference
                                                                                      
      10.28            Asset Purchase Agreement Amendment 1 between the Company       Incorporated By
                       and Nutrition Medical, Inc., dated  October 28, 1998.(22)      Reference
                       
      10.29            Asset Purchase Agreement Amendment 2 between the Company       Incorporated By
                       and Nutrition Medical, Inc., dated  December 23,               Reference
                       1998.(23)
                       
     ##10.30           Collaboration and License Agreement between the Company        Electronic  
                       and American Home Products Corporation acting through its      Transmission
                       Wyeth-Ayerst Laboratories Division, dated October 15,
                       1998
                       
     ##10.31           Manufacturing and Supply Agreement between the Company         Electronic  
                       and American Home Products Corporation acting through its      Transmission
                       Wyeth-Ayerst Laboratories Division dated October 15,
                       1998.
                       
     ##10.32           Product Development Collaboration, Manufacturing and           Electronic  
                       Supply, and Retail Marketing Agreement between the             Transmission
                       Company and General Nutrition Corporation, dated December      
                       22, 1998

       11.1            Statement re: computation of per share earnings (loss).        Electronic  
                                                                                      Transmission

       13.1            1998 Annual Report to Stockholders                             Electronic 
                                                                                      Transmission

       23.1            Consent of Ernst & Young LLP.                                  Electronic 
                                                                                      Transmission

       27.1            Financial Data Schedule for Year Ended December 31, 1998.      Electronic 
                                                                                      Transmission

       27.2            Restated Financial Data Schedule for Quarter ended March       Incorporated By
                       31, 1996. (19)                                                 Reference 
</TABLE>

     (1)  Incorporated herein by reference to the same numbered Exhibit to the
          Company's Registration Statement on Form S-1 (Registration No.
          333-1032).
     
     (2)  Incorporated herein by reference to the same numbered Exhibit to the
          Company's Quarterly Report on Form 10-Q for the quarterly period ended
          June 30, 1996 (File No. 0-27976).

<PAGE>

     (3)  Incorporated herein by reference to the same numbered Exhibit to the
          Company's Quarterly Report on Form 10-Q for the quarterly period ended
          September 30, 1996 (File No. 0-27976).
     
     (4)  Incorporated herein by reference to the same numbered Exhibit to the
          Company's Annual Report on Form 10-K for the period ended December 31,
          1996 (File No. 0-27976).

     (5)  Incorporated herein by reference to the same numbered Exhibit to the
          Company's Quarterly Report on Form 10-Q for the quarterly period ended
          March 31, 1997 (File No. 0-27976).
     
     (6)  Incorporated herein by reference to Appendix A to the Company's 1997
          Definitive Proxy Statement on Schedule 14A (File No. 0-27976).
     
     (7)  Incorporated herein by reference to the same numbered Exhibit to the
          Company's Quarterly Report on Form 10-Q for the quarterly period ended
          June 30, 1997 (File No. 0-27976).
     
     (8)  Incorporated herein by reference to Exhibit No. 4.4 to the Company's
          Registration Statement on Form S-3 (Registration No. 333-41151).
     
     (9)  Incorporated herein by reference to Exhibit No. 4.5 to the Company's
          Registration Statement on Form S-3 (Registration No. 333-41151).
     
     (10) Incorporated herein by reference to Exhibit No. 4.6 to the Company's
          Registration Statement on Form S-3 (Registration No. 333-41151).
     
     (11) Incorporated herein by reference to Exhibit No. 4.7 to the Company's
          Registration Statement on Form S-3 (Registration No. 333-41151).
     
     (12) Incorporated herein by reference to Exhibit No. 4.8 to the Company's
          Registration Statement on Form S-3 (Registration No. 333-41151).
     
     (13) Incorporated herein by reference to Exhibit No. 4.9 to the Company's
          Registration Statement on Form S-3 (Registration No. 333-41151).
     
     (14) Incorporated herein by reference to Exhibit No. 4.10 to the Company's
          Registration Statement on Form S-3(Registration No. 333-41151).
     
     (15) Incorporated herein by reference to Exhibit No. 4.11 to the Company's
          Registration Statement on Form S-3 (Registration No. 333-41151).
     
     (16) Incorporated herein by reference to Exhibit No. 4.12 to Amendment No.
          1 to the Company's Registration Statement on Form S-3 (Registration
          No. 333-41151).
     
     (17) Incorporated herein by reference to Exhibit No. 4.13 to Amendment No.
          1 to the Company's Registration Statement on Form S-3 (Registration
          No. 333-41151).
     
     (18) Incorporated herein by reference to Exhibit No. 4.14 to Amendment No.
          1 to the Company's Registration Statement on Form S-3 (Registration
          No. 333-41151).
          
     (19) Incorporated herein by reference to the same numbered Exhibit to the
          Company's Annual Report on Form 10-K for the period ended December 31,
          1997 (File No. 0-27976).    

     (20) Incorporated herein by reference to the same numbered Exhibit to the
          Company's Quarterly Report on Form 10-Q for the period ended June 30,
          1998 (File No. 0-27976).

     (21) Incorporated herein by reference to the same numbered Exhibit to the
          Company's Quarterly Report on Form 10-Q for the period ended September
          30, 1998 (File No. 0-27976).

<PAGE>

     (22) Incorporated herein by reference to Exhibit No. 2.2 to the Company's
          Report on Form 8-K, dated December 23, 1998 (File No. 0-27976).

     (23) Incorporated herein by reference to Exhibit No. 2.3 to the Company's
          Report on Form 8-K, dated December 23, 1998 (File No. 0-27976).

               
     *    Management contract or compensatory plan or arrangement required to be
          filed as an exhibit to this Form 10-K.  
     
     #    Contains portions for which confidential treatment has been granted to
          the Company.

     ##   Contains portions of which confidential treatment has been applied for
          by the Company.


<PAGE>

                                                                    EXHIBIT 4.33
                                      WARRANT

                   TO SUBSCRIBE FOR AND PURCHASE COMMON STOCK OF

                                    GALAGEN INC.


          THIS WARRANT CERTIFIES THAT, for value received, William Young and 
Rebecca Young (,herein called "Purchaser") or registered assigns is entitled 
to subscribe for and purchase from GalaGen Inc. (herein called the 
"Company"), a corporation organized and existing under the laws of the State 
of Delaware, at the price specified below (subject to adjustment as noted 
below) at any time from and after August 13, 1998 to and including August 13, 
2003, Fifty Thousand (50,000) fully paid and nonassessable shares of the 
Company's Common Stock, $.01 par value per share ("Common Stock") (subject to 
adjustment as noted below). This Warrant granted to the Purchaser is in lieu 
of any granted warrants to Investor Network Company or Young, Smith and 
Associates.

          The warrant purchase price shall be $3.125 per share (subject to 
adjustment as noted below).

          This Warrant is subject to the following provisions, terms and 
conditions:

          1.     The rights represented by this Warrant may be exercised by 
the holder hereof, in whole or in part, by written notice of exercise, in the 
form attached hereto, delivered to the Company ten days prior to the intended 
date of exercise and by the surrender of this Warrant (properly endorsed if 
required) at the principal office of the Company and upon payment to it by 
check of the purchase price in lawful money of the United States.  The 
Company agrees that the shares so purchased shall be and are deemed to be 
issued to the holder hereof as the record owner of such shares as of the 
close of business on the date on which this Warrant shall have been 
surrendered and payment made for such shares as aforesaid.  Subject to the 
provisions of the next succeeding paragraph, certificates for the shares of 
stock so purchased shall be delivered to the holder hereof within a 
reasonable time, not exceeding 10 days, after the rights represented by this 
Warrant shall have been so exercised, and, unless this Warrant has expired, a 
new Warrant representing the number of shares, if any, with respect to which 
this Warrant shall not then have been exercised shall also be delivered to 
the holder hereof within such time.

          2.     Notwithstanding the foregoing, however, the Company shall 
not be required to deliver any certificate for shares of stock upon exercise 
of this Warrant except in accordance with the provisions, and subject to the 
limitations, of paragraph 7 hereof and the restrictive legend under the 
heading "Restriction on Transfer" below.

          3.     The Company covenants and agrees that all shares which may 
be issued upon the exercise of the rights represented by this Warrant will, 
upon issuance, be duly authorized and issued, fully paid and nonassessable.  
The Company further covenants and 

<PAGE>

agrees that during the period within which the rights represented by this 
Warrant may be exercised, the Company will at all times have authorized, and 
reserved for the purpose of issue or transfer upon exercise of the 
subscription rights evidenced by this Warrant, a sufficient number of shares 
of its Common Stock to provide for the exercise of the rights represented by 
this Warrant.

          4.     The above provisions are, however, subject to the following:

          (a)    The warrant purchase price shall, from and after the date of 
issuance of this Warrant, be subject to adjustment from time to time as 
hereinafter provided.  Upon each adjustment of the warrant purchase price, 
the holder of this Warrant shall thereafter be entitled to purchase, at the 
warrant purchase price resulting from such adjustment, the number of shares 
obtained by multiplying the warrant purchase price in effect immediately 
prior to such adjustment by the number of shares purchasable pursuant hereto 
immediately prior to such adjustment and dividing the product thereof by the 
warrant purchase price resulting from such adjustment.

          (b)    In case the Company shall (i) declare a dividend upon the 
Common Stock payable in Common Stock (other than a dividend declared to 
effect a subdivision of the outstanding shares of Common Stock, as described 
in paragraph (c) below) or any obligations or any shares of stock of the 
Company which are convertible into or exchangeable for Common Stock (any of 
such obligations or shares of stock being hereinafter called "Convertible 
Securities"), or in any rights or options to purchase Common Stock or 
Convertible Securities, or (ii) declare any other dividend or make any other 
distribution upon the Common Stock payable otherwise than out of earnings or 
earned surplus, then thereafter the holder of this Warrant upon the exercise 
hereof will be entitled to receive the number of shares of Common Stock to 
which such holder shall be entitled upon such exercise, and, in addition and 
without further payment therefor, each dividend described in clause (i) above 
and each dividend or distribution described in clause (ii) above which such 
holder would have received by way of dividends or distributions if 
continuously since such holder became the record holder of this Warrant such 
holder (x) had been the record holder of the number of shares of Common Stock 
then received, and (y) had retained all dividends or distributions in stock 
or securities (including Common Stock or Convertible Securities, and any 
rights or options to purchase any Common Stock or Convertible Securities) 
payable in respect of such Common Stock or in respect of any stock or 
securities paid as dividends or distributions and originating directly or 
indirectly from such Common Stock.  For the purposes of the foregoing, a 
dividend or distribution other than in cash shall be considered payable out 
of earnings or earned surplus only to the extent that such earnings or earned 
surplus are charged an amount equal to the fair value of such dividend or 
distribution as determined by the Board of Directors of the Company.

          (c)    In case the Company shall at any time subdivide its 
outstanding shares of Common Stock into a greater number of shares, the 
warrant purchase price in effect immediately prior to such subdivision shall 
be proportionately reduced, and conversely, in case the outstanding shares of 
Common Stock of the Company shall be combined into a smaller 


                                      -2-

<PAGE>

number of shares, the warrant purchase price in effect immediately prior to 
such combination shall be proportionately increased.

          (d)    If any capital reorganization or reclassification of the 
capital stock of the Company, or consolidation or merger of the Company with 
another corporation, or sale of all or substantially all of its assets to 
another corporation (any such reorganization, reclassification, 
consolidation, merger or sale being hereinafter called an "Event") shall be 
effected in such a way that holders of Common Stock shall be entitled to 
receive stock, securities or assets with respect to or in exchange for Common 
Stock, then, unless lawful and adequate provision shall have been made 
whereby the holder hereof shall thereafter have the right to purchase and 
receive, upon the basis and upon the terms and conditions specified in this 
Warrant and in lieu of the shares of the Common Stock of the Company 
immediately theretofore purchasable and receivable upon the exercise of the 
rights represented hereby, such shares of stock, securities or assets as may 
be issued or payable with respect to or in exchange for a number of 
outstanding shares of Common Stock of the Company equal to the number of 
shares of such stock immediately theretofore purchasable and receivable upon 
the exercise of the rights represented hereby had the Event not taken place, 
the Board of Directors of the Company shall declare, at least twenty days 
prior to the actual effective date of the Event, and provide written notice 
to the holder hereof of the declaration, that this Warrant shall be canceled 
at the time of, or immediately prior to the occurrence of, the Event (unless 
it shall have been exercised prior to the occurrence of the Event) in 
exchange for payment to the holder hereof, within twenty days after the 
Event, of cash equal to the amount (if any), for each share of Common Stock 
issuable upon exercise of this Warrant, by which the Event Proceeds per share 
of Common Stock (as hereinafter defined) exceeds the purchase price per share 
of Common Stock under this Warrant.  In the event of a declaration pursuant 
to this paragraph (d), this Warrant, if not exercised prior to the Event, 
shall be canceled at the time of, or immediately prior to, the Event, as 
provided in the declaration, subject to the payment obligations of the 
Company provided in this paragraph (d).  For purposes of this paragraph (d), 
"Event Proceeds per share of Common Stock" shall mean the cash plus the fair 
market value, as determined in good faith by the Board of Directors of the 
Company, of the non-cash consideration to be received per share of Common 
Stock by the shareholders of the Company upon the occurrence of the Event. If 
provision shall be made, pursuant to this paragraph (d), for the right of the 
holder hereof to purchase and receive stock, securities or assets of any 
successor corporation (other than the Company) upon the occurrence of any 
Event, then such successor corporation shall assume, by written instrument 
executed and mailed to the registered holder hereof at the last address of 
such holder appearing on the books of the Company, the obligation to deliver 
to such holder such shares of stock, securities or assets as, in accordance 
with the foregoing provisions, such holder may be entitled to purchase.

          (e)    Upon any adjustment of the warrant purchase price, then and 
in each such case the Company shall give written notice thereof, by 
first-class mail, postage prepaid, addressed to the registered holder of this 
Warrant at the address of such holder as shown on the books of the Company, 
which notice shall state the warrant purchase price resulting from such 
adjustment and the increase or decrease, if any, in the number of shares 
purchasable at such 


                                      -3-

<PAGE>

price upon the exercise of this Warrant, setting forth in reasonable detail 
the method of calculation and the facts upon which such calculation is based.

          (f)    In case any time:

          (1)    the Company shall declare any cash dividend on Common
     Stock at a rate in excess of the rate of the last cash dividend
     theretofore paid;

          (2)    the Company shall pay any dividend payable in stock upon
     Common Stock or make any distribution (other than regular cash
     dividends) to the holders of Common Stock;

          (3)    the Company shall offer for subscription pro rata to the
     holders of Common Stock any additional shares of stock of any class or
     other rights;

          (4)    there shall be any capital reorganization, or
     reclassification of the capital stock of the Company, or consolidation
     or merger of the Company with, or sale of all or substantially all of
     its assets to, another corporation; or

          (5)    there shall be a voluntary or involuntary dissolution,
     liquidation or winding up of the Company;

then, in any one or more of said cases, the Company shall give written 
notice, by first-class mail, postage prepaid, addressed to the registered 
holder of this Warrant at the address of such holder as shown on the books of 
the Company, of the date on which (aa) the books of the Company shall close 
or a record shall be taken for such dividend, distribution or subscription 
rights, or (bb) such reorganization, reclassification, consolidation, merger, 
sale, dissolution, liquidation or winding up shall take place, as the case 
may be.  Such notice shall also specify the date as of which the holders of 
Common Stock of record shall participate in such dividend, distribution or 
subscription rights, or shall be entitled to exchange their Common Stock for 
securities or other property deliverable upon such reorganization, 
reclassification, consolidation, merger, sale, dissolution, liquidation or 
winding up, as the case may be.  Such written notice shall be given at least 
20 days prior to the action in question and not less than 20 days prior to 
the record date or the date on which the Company's transfer books are closed 
in respect thereto.

          (g)    If any event occurs as to which in the opinion of the Board 
of Directors of the Company the other provisions of this paragraph 4 are not 
strictly applicable or if strictly applicable would not fairly protect the 
purchase rights of the holder of this Warrant or of Common Stock in 
accordance with the essential intent and principles of such provisions, then 
the Board of Directors shall make an adjustment in the application of such 
provisions, in accordance with such essential intent and principles, so as to 
protect such purchase rights as aforesaid; provided, however, that the 
members of the Board of Directors of the Company shall not be liable to the 
holders hereof for any such determination made in good faith.


                                      -4-

<PAGE>

          (h)    No fractional shares of Common Stock shall be issued upon 
the exercise of this Warrant, but, instead of any fraction of a share which 
would otherwise be issuable, the Company shall pay a cash adjustment (which 
may be effected as a reduction of the amount to be paid by the holder hereof 
upon such exercise) in respect of such fraction in an amount equal to the 
same fraction of the market price per share of Common Stock as of the close 
of business on the date preceding the written notice of exercise required by 
paragraph 1 above. "Market price" for purposes of this paragraph 4(h) shall 
mean, if the Common Stock is traded on a securities exchange or on The Nasdaq 
National Market, the closing price of the Common Stock on such exchange or 
The Nasdaq National Market, or, if the Common Stock is otherwise traded in 
the over-the-counter market, the closing bid price, in each case averaged 
over a period of 20 consecutive business days prior to the date as of which 
"market price" is being determined.  If at any time the Common Stock is not 
traded on an exchange or The Nasdaq National Market, or otherwise traded in 
the over-the-counter market, the "market price" shall be deemed to be the 
higher of (i) the book value thereof as determined by any firm of independent 
public accountants of recognized standing selected by the Board of Directors 
of the Company as of the last day of any month ending within 60 days 
preceding the date as of which the determination is to be made, or (ii) the 
fair value thereof determined in good faith by the Board of Directors of the 
Company as of a date which is within l5 days of the date as of which the 
determination is to be made.

          5.     As used herein, the term "Common Stock" shall mean and 
include the Company's presently authorized Common Stock and shall also 
include any capital stock of any class of the Company hereafter authorized 
which shall not be limited to a fixed sum or percentage in respect of the 
rights of the holders thereof to participate in dividends or in the 
distribution of assets upon the voluntary or involuntary liquidation, 
dissolution or winding up of the Company; provided that the shares 
purchasable pursuant to this Warrant shall include shares designated as 
Common Stock of the Company on the date of original issue of this Warrant or, 
in the case of any reclassification of the outstanding shares thereof, the 
stock, securities or assets provided for in paragraph 4(d) above.

          6.     This Warrant shall not entitle the holder hereof to any 
voting rights or other rights as a stockholder of the Company.

          7.(a)  The holder of this Warrant acknowledges that neither this 
Warrant nor any of the shares of Common Stock issuable upon exercise hereof 
have been registered under the Securities Act of 1933, as amended (the 
"Act"), or any state securities laws and that this Warrant or such shares of 
Common Stock may only be transferred in accordance with this paragraph 7.  
The holder of this Warrant, by acceptance hereof, represents that it has 
acquired this Warrant for investment and not with a view to distribution of 
this Warrant or the shares of Common Stock issuable upon exercise hereof 
within the meaning of the Act and the rules and regulations thereunder.  

          (b)    The Purchaser realizes that the purchase of this Warrant is 
a speculative investment, and that the economic benefits which may be derived 
therefrom are uncertain.  In determining whether or not to purchase the 
Warrant, the Purchaser has relied solely upon the 


                                      -5-

<PAGE>

publicly-available materials filed by the Company with the Securities and 
Exchange Commission, copies of which have been reviewed by the Purchaser, and 
upon independent investigations made by the Purchaser and its representatives.

          (c)    The holder of this Warrant, by acceptance hereof, agrees to 
give written notice to the Company before exercising or transferring this 
Warrant, in whole or in part, or transferring any shares of Common Stock 
issuable or issued upon the exercise hereof, of such holder's intention to do 
so, describing briefly the manner of any proposed exercise or transfer.  Such 
holder shall also provide the Company with an opinion of counsel satisfactory 
to the Company to the effect that the proposed exercise or transfer of this 
Warrant or transfer of shares may be effected without registration or 
qualification under the Act and any applicable state securities laws of this 
Warrant and the shares of Common Stock issuable or issued upon the exercise 
hereof.  Upon receipt of such written notice and opinion by the Company, such 
holder shall be entitled to exercise this Warrant in accordance with its 
terms, or to transfer this Warrant, or to transfer shares of Common Stock 
issuable or issued upon the exercise of this Warrant, all in accordance with 
the terms of the notice delivered by such holder to the Company, provided 
that an appropriate legend respecting the aforesaid restrictions on transfer 
may be endorsed on this Warrant or the certificates for such shares.  In the 
event of a proposed transfer of this Warrant, prior to the transfer the 
proposed transferee shall execute and deliver to the Company a warrant 
transfer letter in the form attached hereto.  

          8.     Subject to the provisions of paragraph 7 hereof, this 
Warrant and all rights hereunder are transferable, in whole or in part, at 
the principal office of the Company by the holder hereof in person or by duly 
authorized attorney, upon surrender of this Warrant properly endorsed.  Each 
taker and holder of this Warrant, by taking or holding the same, consents and 
agrees that the bearer of this Warrant, when endorsed, may be treated by the 
Company and all other persons dealing with this Warrant as the absolute owner 
hereof for any purpose and as the person entitled to exercise the rights 
represented by this Warrant, or to the transfer hereof on the books of the 
Company, any notice to the contrary notwithstanding; but until such transfer 
on such books, the Company may treat the registered holder hereof as the 
owner for all purposes.

          9.   The Purchaser shall receive registration  rights as follows:

          (a)    If the Company at any time within five years from the date 
of this Warrant (but no more than two (2) years after the date of exercise of 
this Warrant), proposes to register under the Securities Act (except by a 
Form S-4 or Form S-8 Registration Statement or any successor forms thereto) 
any of its securities, it will give written notice to Purchaser hereof, and 
on the written request from such Purchaser given within Ten (10) days after 
receipt of any such notice (which request shall specify the interest in this 
Warrant or the Common Stock from the Warrant to be  intended to be sold or 
disposed of by such Purchaser (the "Warrant Shares") and describe the nature 
of any proposed sale or other disposition thereof), the Company will use its 
best efforts to cause all such Warrant Shares, the Purchaser of which shall 
have 


                                      -6-

<PAGE>

requested the registration or qualification thereof, to be included in such 
registration statement proposed to be filed by the Company; provided that:

          (i)    all Warrant Shares subject to this Warrant must be registered
     (no registration of a portion of the Warrant Shares is permitted),
     provided, however, if a greater number of Warrant Shares is offered for
     participation in the proposed offering than in the reasonable opinion of
     the managing underwriter of the proposed offering can be accommodated
     without adversely affecting the proposed offering, then the amount of
     Warrant Shares proposed to be offered by such Purchaser for registration,
     as well as the number of securities of any other selling shareholders
     participating in the registration, shall be proportionately reduced to a
     number deemed satisfactory by the managing underwriter

          (ii)   the Company may, at its sole discretion and without the
     consent of the Purchaser of the Warrant Shares, withdraw such registration
     statement and abandon the proposed offering in which any such holder had
     requested to participate;

          (iii)  if the offering to which the registration statement relates is
     to be distributed by or through an underwriter, the Purchaser of the
     Warrant Shares shall agree, as a condition to the inclusion of such
     Purchaser's securities in such registration, to sell securities held by
     such Purchaser through such underwriter on the same terms and conditions as
     the underwriter agrees to sell securities on behalf of the Company and not
     to sell, transfer, pledge, assign or otherwise dispose of the Warrant
     Shares of the Company not sold by such holder in such offering for such
     period (up to 180 days after the effective date of the registration
     statement) as may be required by the underwriter;

          (iv)   the Company shall not be obligated to include any Warrant
     Shares in any such registration if the Purchaser is able to sell all of the
     Warrant Shares in a single transaction pursuant to Rule 144 under the
     Securities Act (or any other similar rule or regulation) during the
     three-month period beginning on the date such notice is received by such
     holder, calculated as of the date of such receipt.

          (b)    Upon the exercise of registration rights pursuant to this 
Section 9, Purchaser agrees to supply the Company with such information as 
may be required by the Company to register or qualify the shares to be 
registered.

          (c)    With respect to each inclusion of securities in a 
registration statement pursuant to this Section 9, the Company shall bear the 
following fees, costs, and expenses: all registration, filing and NASD fees, 
printing expenses, fees and disbursements of counsel and accountants for the 
Company, fees and disbursements of counsel for the underwriter or 
underwriters of such securities (if the Company is required to bear such fees 
and disbursements), all internal expenses, and legal fees and disbursements 
and other expenses of complying with state securities laws of any 
jurisdictions in which the securities to be offered are to be registered or 
qualified.  Fees and disbursements of special counsel and accountants for 


                                      -7-

<PAGE>

the selling Purchaser, underwriting discounts and commissions, and transfer 
taxes for selling Purchaser and any other expenses relating to the sale of 
securities by the selling Purchaser not expressly included above shall be 
borne by the selling Purchaser.

          (d)    The Company hereby indemnifies the Purchaser of this Warrant 
and of any Warrant Shares within the meaning of Section 15 of the Securities 
Act, against all losses, claims, damages, and liabilities caused by (i) any 
untrue statement or alleged untrue statement of a material fact contained in 
any Registration Statement or Prospectus (and as amended or supplemented if 
the Company shall have furnished any amendments thereof or supplements 
thereto), any Preliminary Prospectus or any state securities law filings; 
(ii) any omission or alleged omission to state therein a material fact 
required to be stated therein or necessary to make the statements therein not 
misleading except insofar as such losses, claims, damages, or liabilities are 
caused by any untrue statement or omission contained in information furnished 
in writing to the Company by such Purchaser expressly for use therein; and 
each such Purchaser by its acceptance hereof severally agrees that it will 
indemnify and hold harmless the Company, each of its officers who signs such 
Registration Statement, each underwriter of the Common Stock so registered, 
and each person, if any, who controls the Company or such underwriter, within 
the meaning of Section 15 of the Securities Act, with respect to losses, 
claims, damages, or liabilities which are caused by any untrue statement or 
omission contained in information furnished in writing to the Company by such 
Purchaser expressly for use therein.

          10.    This Warrant is exchangeable, upon the surrender hereof by 
the holder hereof at the principal office of the Company, for new Warrants of 
like tenor representing in the aggregate the right to subscribe for and 
purchase the number of shares which may be subscribed for and purchased 
hereunder, each of such new Warrants to represent the right to subscribe for 
and purchase such number of shares as shall be designated by said holder 
hereof at the time of such surrender.

          11.    All questions concerning this Warrant will be governed and 
interpreted and enforced in accordance with the internal law of the State of 
Minnesota.


                                      -8-

<PAGE>

          IN WITNESS WHEREOF, the Company has caused this Warrant to be 
signed by its duly authorized officer and this Warrant to be dated as of 
March 9, 1999.

                                         GALAGEN INC.

                                         By
                                           -----------------------------------

                                         Its
                                            ----------------------------------
                                          

                            RESTRICTION ON TRANSFER

          The securities evidenced hereby may not be transferred without (i) 
the opinion of counsel satisfactory to the Company that such transfer may be 
lawfully made without registration under the Securities Act of 1933, as 
amended, and all applicable state securities laws or (ii) such registration.


                                      -9-

<PAGE>

                                     ASSIGNMENT

                        (To Be Signed Only Upon Assignment)


          FOR VALUE RECEIVED, the undersigned hereby sells, assigns and

transfers unto ___________________________________________________________ this

Warrant, and appoints ____________________________________________________ to

transfer this Warrant on the books of GalaGen Inc. with the full power of

substitution in the premises.


Dated:  
      -------------------------------------

In the presence of:  
                   -------------------------------------



                                             -----------------------------------
                                             (Signature must conform in all
                                             respects to the name of the holder
                                             as specified on the face of this
                                             Warrant without any alteration or
                                             change whatsoever, and the
                                             signature must be guaranteed in the
                                             usual manner)

<PAGE>

                       FORM OF WARRANT TRANSFER LETTER


To:  GalaGen Inc. 


Ladies and Gentlemen:

     The undersigned is a proposed transferee of the warrant (the "Warrant") 
to purchase ____________________ shares of Common Stock, par value $.01 
("Common Stock"), of GalaGen Inc., a Delaware corporation (the "Company"), 
currently registered in the name of ____________________.  In order to induce 
the Company to consent to the transfer of the Warrant, the undersigned hereby 
represents, warrants and agrees as follows:

     1.   The undersigned acknowledges that neither the Warrant nor any of 
the shares of Common Stock issuable upon exercise thereof have been 
registered under the Securities Act of 1933, as amended (the "Act"), or any 
state securities laws and that, accordingly, the Warrant and such shares of 
Common Stock may only be transferred in accordance with the terms of 
paragraph 7 of the Warrant.  

     2.   The undersigned is acquiring the Warrant for investment and not 
with a view to distribution of the Warrant or the shares of Common Stock 
issuable upon exercise thereof within the meaning of the Act and the rules 
and regulations thereunder.

     3.   The undersigned is an "accredited investor" as defined in Rule 
501(a) of Regulation D promulgated under the Act.  

                              Signature 

- ---------------------------------------

                              Address 
                                      ---------------------------------------

                              Date 
                                   ------------------------------------------


<PAGE>

                           FORM OF EXERCISE NOTICE
                                          
         To be Executed by the Holder of this Warrant if such Holder
                                          
            Desires to Exercise this Warrant in Whole or in Part:

To:  GalaGen Inc. (the "Company")

          The undersigned 
                          -------------------------------------------
                       Please insert Social Security or other
                          identifying number of Purchaser:

                    -------------------------------------------

hereby irrevocably elects to exercise the right of purchase represented by 
this Warrant for, and to purchase thereunder, ______________________ shares 
of the Common Stock provided for therein and tenders payment herewith to the 
order of the Company in the amount of $______________________, such payment 
being made as provided on the face of this Warrant.

     In order to induce the Company to consent to the exercise of this 
Warrant, the undersigned hereby represents, warrants and agrees as follows:

     1.   The undersigned acknowledges that neither this Warrant nor any of 
the shares of Common Stock issuable upon exercise hereof have been registered 
under the Securities Act of 1933, as amended (the "Act"), or any state 
securities laws and that, accordingly, this Warrant may be exercised and the 
shares of Common Stock issued pursuant to this exercise may only be 
transferred in accordance with the terms of paragraph 7 of this Warrant.  

     2.   The undersigned is acquiring the shares of Common Stock issued 
pursuant to this exercise for investment and not with a view to distribution 
of such shares within the meaning of the Act and the rules and regulations 
thereunder.

<PAGE>

          The undersigned requests that certificates for such shares of 
Common Stock be issued as follows:

Name:        
             ------------------------------------------------------------------

Address:     
             ------------------------------------------------------------------

Deliver to:  
             ------------------------------------------------------------------

Address:     
             ------------------------------------------------------------------

and, if such number of shares of Common Stock shall not be all the shares of 
Common Stock purchasable hereunder, that a new Warrant for the balance 
remaining of the shares of Common Stock purchasable under this Warrant be 
registered in the name of, and delivered to, the undersigned at the address 
stated below.

Address:     
             ------------------------------------------------------------------

                                                                                
                              Signature 
                                        ---------------------------------------
                                        (Signature must conform in all respects
                                        to the name of the holder as written
                                        specified on the face of this Warrant
                                        without any alteration or change
                                        whatsoever)

Dated:  
      ------------------------




<PAGE>

                                                                    EXHIBIT 4.34
                                      WARRANT

                   TO SUBSCRIBE FOR AND PURCHASE COMMON STOCK OF

                                    GALAGEN INC.


          THIS WARRANT CERTIFIES THAT, for value received, Henry J. Cardello 
(herein called "Purchaser") or registered assigns is entitled to subscribe 
for and purchase from GalaGen Inc. (herein called the "Company"), a 
corporation organized and existing under the laws of the State of Delaware, 
at the price specified below (subject to adjustment as noted below) at any 
time from and after September 30, 1998 to and including September 30, 2003, 
Twelve Thousand Five Hundred (12,500) fully paid and nonassessable shares of 
the Company's Common Stock, $.01 par value per share ("Common Stock") 
(subject to adjustment as noted below).

          The warrant purchase price shall be $1.813 per share (subject to 
adjustment as noted below).

          This Warrant is subject to the following provisions, terms and 
conditions:

          1.   The rights represented by this Warrant may be exercised by the 
holder hereof, in whole or in part, by written notice of exercise, in the 
form attached hereto, delivered to the Company ten days prior to the intended 
date of exercise and by the surrender of this Warrant (properly endorsed if 
required) at the principal office of the Company and upon payment to it by 
check of the purchase price in lawful money of the United States.  The 
Company agrees that the shares so purchased shall be and are deemed to be 
issued to the holder hereof as the record owner of such shares as of the 
close of business on the date on which this Warrant shall have been 
surrendered and payment made for such shares as aforesaid.  Subject to the 
provisions of the next succeeding paragraph, certificates for the shares of 
stock so purchased shall be delivered to the holder hereof within a 
reasonable time, not exceeding l0 days, after the rights represented by this 
Warrant shall have been so exercised, and, unless this Warrant has expired, a 
new Warrant representing the number of shares, if any, with respect to which 
this Warrant shall not then have been exercised shall also be delivered to 
the holder hereof within such time.

          2.   Notwithstanding the foregoing, however, the Company shall not 
be required to deliver any certificate for shares of stock upon exercise of 
this Warrant except in accordance with the provisions, and subject to the 
limitations, of paragraph 7 hereof and the restrictive legend under the 
heading "Restriction on Transfer" below.

          3.   The Company covenants and agrees that all shares which may be 
issued upon the exercise of the rights represented by this Warrant will, upon 
issuance, be duly authorized and issued, fully paid and nonassessable.  The 
Company further covenants and agrees that during the period within which the 
rights represented by this Warrant may be 

<PAGE>

exercised, the Company will at all times have authorized, and reserved for 
the purpose of issue or transfer upon exercise of the subscription rights 
evidenced by this Warrant, a sufficient number of shares of its Common Stock 
to provide for the exercise of the rights represented by this Warrant.

          4.   The above provisions are, however, subject to the following:

          (a)  The warrant purchase price shall, from and after the date of 
issuance of this Warrant, be subject to adjustment from time to time as 
hereinafter provided.  Upon each adjustment of the warrant purchase price, 
the holder of this Warrant shall thereafter be entitled to purchase, at the 
warrant purchase price resulting from such adjustment, the number of shares 
obtained by multiplying the warrant purchase price in effect immediately 
prior to such adjustment by the number of shares purchasable pursuant hereto 
immediately prior to such adjustment and dividing the product thereof by the 
warrant purchase price resulting from such adjustment.

          (b)  In case the Company shall (i) declare a dividend upon the 
Common Stock payable in Common Stock (other than a dividend declared to 
effect a subdivision of the outstanding shares of Common Stock, as described 
in paragraph (c) below) or any obligations or any shares of stock of the 
Company which are convertible into or exchangeable for Common Stock (any of 
such obligations or shares of stock being hereinafter called "Convertible 
Securities"), or in any rights or options to purchase Common Stock or 
Convertible Securities, or (ii) declare any other dividend or make any other 
distribution upon the Common Stock payable otherwise than out of earnings or 
earned surplus, then thereafter the holder of this Warrant upon the exercise 
hereof will be entitled to receive the number of shares of Common Stock to 
which such holder shall be entitled upon such exercise, and, in addition and 
without further payment therefor, each dividend described in clause (i) above 
and each dividend or distribution described in clause (ii) above which such 
holder would have received by way of dividends or distributions if 
continuously since such holder became the record holder of this Warrant such 
holder (x) had been the record holder of the number of shares of Common Stock 
then received, and (y) had retained all dividends or distributions in stock 
or securities (including Common Stock or Convertible Securities, and any 
rights or options to purchase any Common Stock or Convertible Securities) 
payable in respect of such Common Stock or in respect of any stock or 
securities paid as dividends or distributions and originating directly or 
indirectly from such Common Stock.  For the purposes of the foregoing, a 
dividend or distribution other than in cash shall be considered payable out 
of earnings or earned surplus only to the extent that such earnings or earned 
surplus are charged an amount equal to the fair value of such dividend or 
distribution as determined by the Board of Directors of the Company.

          (c)  In case the Company shall at any time subdivide its 
outstanding shares of Common Stock into a greater number of shares, the 
warrant purchase price in effect immediately prior to such subdivision shall 
be proportionately reduced, and conversely, in case the outstanding shares of 
Common Stock of the Company shall be combined into a 


                                      -2-

<PAGE>

smaller number of shares, the warrant purchase price in effect immediately 
prior to such combination shall be proportionately increased.

          (d)  If any capital reorganization or reclassification of the 
capital stock of the Company, or consolidation or merger of the Company with 
another corporation, or sale of all or substantially all of its assets to 
another corporation (any such reorganization, reclassification, 
consolidation, merger or sale being hereinafter called an "Event") shall be 
effected in such a way that holders of Common Stock shall be entitled to 
receive stock, securities or assets with respect to or in exchange for Common 
Stock, then, unless lawful and adequate provision shall have been made 
whereby the holder hereof shall thereafter have the right to purchase and 
receive, upon the basis and upon the terms and conditions specified in this 
Warrant and in lieu of the shares of the Common Stock of the Company 
immediately theretofore purchasable and receivable upon the exercise of the 
rights represented hereby, such shares of stock, securities or assets as may 
be issued or payable with respect to or in exchange for a number of 
outstanding shares of Common Stock of the Company equal to the number of 
shares of such stock immediately theretofore purchasable and receivable upon 
the exercise of the rights represented hereby had the Event not taken place, 
the Board of Directors of the Company shall declare, at least twenty days 
prior to the actual effective date of the Event, and provide written notice 
to the holder hereof of the declaration, that this Warrant shall be canceled 
at the time of, or immediately prior to the occurrence of, the Event (unless 
it shall have been exercised prior to the occurrence of the Event) in 
exchange for payment to the holder hereof, within twenty days after the 
Event, of cash equal to the amount (if any), for each share of Common Stock 
issuable upon exercise of this Warrant, by which the Event Proceeds per share 
of Common Stock (as hereinafter defined) exceeds the purchase price per share 
of Common Stock under this Warrant.  In the event of a declaration pursuant 
to this paragraph (d), this Warrant, if not exercised prior to the Event, 
shall be canceled at the time of, or immediately prior to, the Event, as 
provided in the declaration, subject to the payment obligations of the 
Company provided in this paragraph (d).  For purposes of this paragraph (d), 
"Event Proceeds per share of Common Stock" shall mean the cash plus the fair 
market value, as determined in good faith by the Board of Directors of the 
Company, of the non-cash consideration to be received per share of Common 
Stock by the shareholders of the Company upon the occurrence of the Event. If 
provision shall be made, pursuant to this paragraph (d), for the right of the 
holder hereof to purchase and receive stock, securities or assets of any 
successor corporation (other than the Company) upon the occurrence of any 
Event, then such successor corporation shall assume, by written instrument 
executed and mailed to the registered holder hereof at the last address of 
such holder appearing on the books of the Company, the obligation to deliver 
to such holder such shares of stock, securities or assets as, in accordance 
with the foregoing provisions, such holder may be entitled to purchase.

          (e)  Upon any adjustment of the warrant purchase price, then and in 
each such case the Company shall give written notice thereof, by first-class 
mail, postage prepaid, addressed to the registered holder of this Warrant at 
the address of such holder as shown on the books of the Company, which notice 
shall state the warrant purchase price resulting from 


                                      -3-

<PAGE>

such adjustment and the increase or decrease, if any, in the number of shares 
purchasable at such price upon the exercise of this Warrant, setting forth in 
reasonable detail the method of calculation and the facts upon which such 
calculation is based.

          (f)  In case any time:

          (1)  the Company shall declare any cash dividend on Common Stock
     at a rate in excess of the rate of the last cash dividend theretofore
     paid;

          (2)  the Company shall pay any dividend payable in stock upon
     Common Stock or make any distribution (other than regular cash
     dividends) to the holders of Common Stock;

          (3)  the Company shall offer for subscription pro rata to the
     holders of Common Stock any additional shares of stock of any class or
     other rights;

          (4)  there shall be any capital reorganization, or
     reclassification of the capital stock of the Company, or consolidation
     or merger of the Company with, or sale of all or substantially all of
     its assets to, another corporation; or

          (5)  there shall be a voluntary or involuntary dissolution,
     liquidation or winding up of the Company;

then, in any one or more of said cases, the Company shall give written 
notice, by first-class mail, postage prepaid, addressed to the registered 
holder of this Warrant at the address of such holder as shown on the books of 
the Company, of the date on which (aa) the books of the Company shall close 
or a record shall be taken for such dividend, distribution or subscription 
rights, or (bb) such reorganization, reclassification, consolidation, merger, 
sale, dissolution, liquidation or winding up shall take place, as the case 
may be.  Such notice shall also specify the date as of which the holders of 
Common Stock of record shall participate in such dividend, distribution or 
subscription rights, or shall be entitled to exchange their Common Stock for 
securities or other property deliverable upon such reorganization, 
reclassification, consolidation, merger, sale, dissolution, liquidation or 
winding up, as the case may be.  Such written notice shall be given at least 
20 days prior to the action in question and not less than 20 days prior to 
the record date or the date on which the Company's transfer books are closed 
in respect thereto.

          (g)  If any event occurs as to which in the opinion of the Board of 
Directors of the Company the other provisions of this paragraph 4 are not 
strictly applicable or if strictly applicable would not fairly protect the 
purchase rights of the holder of this Warrant or of Common Stock in 
accordance with the essential intent and principles of such provisions, then 
the Board of Directors shall make an adjustment in the application of such 
provisions, in accordance with such essential intent and principles, so as to 
protect such purchase rights as aforesaid; provided, however, that the 
members of the Board of Directors of the Company shall not be liable to the 
holders hereof for any such determination made in good faith.


                                      -4-

<PAGE>

          (h)  No fractional shares of Common Stock shall be issued upon the 
exercise of this Warrant, but, instead of any fraction of a share which would 
otherwise be issuable, the Company shall pay a cash adjustment (which may be 
effected as a reduction of the amount to be paid by the holder hereof upon 
such exercise) in respect of such fraction in an amount equal to the same 
fraction of the market price per share of Common Stock as of the close of 
business on the date preceding the written notice of exercise required by 
paragraph 1 above. "Market price" for purposes of this paragraph 4(h) shall 
mean, if the Common Stock is traded on a securities exchange or on The Nasdaq 
National Market, the closing price of the Common Stock on such exchange or 
The Nasdaq National Market, or, if the Common Stock is otherwise traded in 
the over-the-counter market, the closing bid price, in each case averaged 
over a period of 20 consecutive business days prior to the date as of which 
"market price" is being determined.  If at any time the Common Stock is not 
traded on an exchange or The Nasdaq National Market, or otherwise traded in 
the over-the-counter market, the "market price" shall be deemed to be the 
higher of (i) the book value thereof as determined by any firm of independent 
public accountants of recognized standing selected by the Board of Directors 
of the Company as of the last day of any month ending within 60 days 
preceding the date as of which the determination is to be made, or (ii) the 
fair value thereof determined in good faith by the Board of Directors of the 
Company as of a date which is within l5 days of the date as of which the 
determination is to be made.

          5.   As used herein, the term "Common Stock" shall mean and include 
the Company's presently authorized Common Stock and shall also include any 
capital stock of any class of the Company hereafter authorized which shall 
not be limited to a fixed sum or percentage in respect of the rights of the 
holders thereof to participate in dividends or in the distribution of assets 
upon the voluntary or involuntary liquidation, dissolution or winding up of 
the Company; provided that the shares purchasable pursuant to this Warrant 
shall include shares designated as Common Stock of the Company on the date of 
original issue of this Warrant or, in the case of any reclassification of the 
outstanding shares thereof, the stock, securities or assets provided for in 
paragraph 4(d) above.

          6.   This Warrant shall not entitle the holder hereof to any voting 
rights or other rights as a stockholder of the Company.

          7.(a)     The holder of this Warrant acknowledges that neither this 
Warrant nor any of the shares of Common Stock issuable upon exercise hereof 
have been registered under the Securities Act of 1933, as amended (the 
"Act"), or any state securities laws and that this Warrant or such shares of 
Common Stock may only be transferred in accordance with this paragraph 7.  
The holder of this Warrant, by acceptance hereof, represents that it has 
acquired this Warrant for investment and not with a view to distribution of 
this Warrant or the shares of Common Stock issuable upon exercise hereof 
within the meaning of the Act and the rules and regulations thereunder.  

          (b)  The Purchaser realizes that the purchase of this Warrant is a 
speculative investment, and that the economic benefits which may be derived 
therefrom are uncertain.  In determining whether or not to purchase the 
Warrant, the Purchaser has relied solely upon the 


                                      -5-

<PAGE>

publicly-available materials filed by the Company with the Securities and 
Exchange Commission, copies of which have been reviewed by the Purchaser, and 
upon independent investigations made by the Purchaser and its representatives.

          (c)  The Purchaser represents to the Company that he is an 
"accredited investor" as defined in Rule 501(a) of Regulation D promulgated 
under the Act, by virtue of being (i) a natural person whose individual net 
worth, or joint net worth with his spouse, at the time of the purchase 
exceeds $1,000,000 or (ii) a natural person who had an individual income in 
excess of $200,000 in each of the two most recent years or joint income with 
his spouse in excess of $300,000 in each of those years and has a reasonable 
expectation of reaching the same income level in the current year.

          (d)  The holder of this Warrant, by acceptance hereof, agrees to 
give written notice to the Company before exercising or transferring this 
Warrant, in whole or in part, or transferring any shares of Common Stock 
issuable or issued upon the exercise hereof, of such holder's intention to do 
so, describing briefly the manner of any proposed exercise or transfer.  Such 
holder shall also provide the Company with an opinion of counsel satisfactory 
to the Company to the effect that the proposed exercise or transfer of this 
Warrant or transfer of shares may be effected without registration or 
qualification under the Act and any applicable state securities laws of this 
Warrant and the shares of Common Stock issuable or issued upon the exercise 
hereof.  Upon receipt of such written notice and opinion by the Company, such 
holder shall be entitled to exercise this Warrant in accordance with its 
terms, or to transfer this Warrant, or to transfer shares of Common Stock 
issuable or issued upon the exercise of this Warrant, all in accordance with 
the terms of the notice delivered by such holder to the Company, provided 
that an appropriate legend respecting the aforesaid restrictions on transfer 
may be endorsed on this Warrant or the certificates for such shares.  In the 
event of a proposed transfer of this Warrant, prior to the transfer the 
proposed transferee shall execute and deliver to the Company a warrant 
transfer letter in the form attached hereto.  

          8.   Subject to the provisions of paragraph 7 hereof, this Warrant 
and all rights hereunder are transferable, in whole or in part, at the 
principal office of the Company by the holder hereof in person or by duly 
authorized attorney, upon surrender of this Warrant properly endorsed.  Each 
taker and holder of this Warrant, by taking or holding the same, consents and 
agrees that the bearer of this Warrant, when endorsed, may be treated by the 
Company and all other persons dealing with this Warrant as the absolute owner 
hereof for any purpose and as the person entitled to exercise the rights 
represented by this Warrant, or to the transfer hereof on the books of the 
Company, any notice to the contrary notwithstanding; but until such transfer 
on such books, the Company may treat the registered holder hereof as the 
owner for all purposes.

          9.   This Warrant is exchangeable, upon the surrender hereof by the 
holder hereof at the principal office of the Company, for new Warrants of 
like tenor representing in the aggregate the right to subscribe for and 
purchase the number of shares which may be subscribed for and purchased 
hereunder, each of such new Warrants to represent the right to 


                                      -6-

<PAGE>

subscribe for and purchase such number of shares as shall be designated by 
said holder hereof at the time of such surrender.

          10.  All questions concerning this Warrant will be governed and 
interpreted and enforced in accordance with the internal law of the State of 
Minnesota.

          IN WITNESS WHEREOF, the Company has caused this Warrant to be 
signed by its duly authorized officer and this Warrant to be dated as of 
March 9, 1999.

                                         GALAGEN INC.

                                         By
                                           -----------------------------------

                                         Its
                                            ----------------------------------


                           RESTRICTION ON TRANSFER

          The securities evidenced hereby may not be transferred without (i) 
the opinion of counsel satisfactory to the Company that such transfer may be 
lawfully made without registration under the Securities Act of 1933, as 
amended, and all applicable state securities laws or (ii) such registration.


                                      -7-

<PAGE>

                                  ASSIGNMENT
                                          
                     (To Be Signed Only Upon Assignment)


          FOR VALUE RECEIVED, the undersigned hereby sells, assigns and

transfers unto ___________________________________________________________ this

Warrant, and appoints ____________________________________________________ to

transfer this Warrant on the books of GalaGen Inc. with the full power of

substitution in the premises.


Dated:  
      -------------------------------------

In the presence of:  
                   -------------------------------------


                                             
                                             -----------------------------------
                                             (Signature must conform in all
                                             respects to the name of the holder
                                             as specified on the face of this
                                             Warrant without any alteration or
                                             change whatsoever, and the
                                             signature must be guaranteed in the
                                             usual manner)

<PAGE>

                       FORM OF WARRANT TRANSFER LETTER


To:  GalaGen Inc. 


Ladies and Gentlemen:

     The undersigned is a proposed transferee of the warrant (the "Warrant") 
to purchase ____________________ shares of Common Stock, par value $.01 
("Common Stock"), of GalaGen Inc., a Delaware corporation (the "Company"), 
currently registered in the name of ____________________.  In order to induce 
the Company to consent to the transfer of the Warrant, the undersigned hereby 
represents, warrants and agrees as follows:

     1.   The undersigned acknowledges that neither the Warrant nor any of 
the shares of Common Stock issuable upon exercise thereof have been 
registered under the Securities Act of 1933, as amended (the "Act"), or any 
state securities laws and that, accordingly, the Warrant and such shares of 
Common Stock may only be transferred in accordance with the terms of 
paragraph 7 of the Warrant.  

     2.   The undersigned is acquiring the Warrant for investment and not 
with a view to distribution of the Warrant or the shares of Common Stock 
issuable upon exercise thereof within the meaning of the Act and the rules 
and regulations thereunder.

     3.   The undersigned is an "accredited investor" as defined in Rule 
501(a) of Regulation D promulgated under the Act.  

                              Signature 

- ---------------------------------------

                              Address 
                                      ----------------------------------------

                              Date 
                                   -------------------------------------------

<PAGE>

                           FORM OF EXERCISE NOTICE
                                          
            To be Executed by the Holder of this Warrant if such Holder
                                          
               Desires to Exercise this Warrant in Whole or in Part:

To:  GalaGen Inc. (the "Company")

          The undersigned 
                         --------------------------------------------
                       Please insert Social Security or other
                          identifying number of Purchaser:
                    
                    -------------------------------------------

hereby irrevocably elects to exercise the right of purchase represented by 
this Warrant for, and to purchase thereunder, ______________________ shares 
of the Common Stock provided for therein and tenders payment herewith to the 
order of the Company in the amount of $______________________, such payment 
being made as provided on the face of this Warrant.

     In order to induce the Company to consent to the exercise of this 
Warrant, the undersigned hereby represents, warrants and agrees as follows:

     1.   The undersigned acknowledges that neither this Warrant nor any of 
the shares of Common Stock issuable upon exercise hereof have been registered 
under the Securities Act of 1933, as amended (the "Act"), or any state 
securities laws and that, accordingly, this Warrant may be exercised and the 
shares of Common Stock issued pursuant to this exercise may only be 
transferred in accordance with the terms of paragraph 7 of this Warrant.  

     2.   The undersigned is acquiring the shares of Common Stock issued 
pursuant to this exercise for investment and not with a view to distribution 
of such shares within the meaning of the Act and the rules and regulations 
thereunder.

     3.   The undersigned is an "accredited investor" as defined in Rule 
501(a) of Regulation D promulgated under the Act.   

<PAGE>

          The undersigned requests that certificates for such shares of 
Common Stock be issued as follows:

Name:        
             ------------------------------------------------------------------

Address:     
             ------------------------------------------------------------------

Deliver to:  
             ------------------------------------------------------------------

Address:     
             ------------------------------------------------------------------

and, if such number of shares of Common Stock shall not be all the shares of 
Common Stock purchasable hereunder, that a new Warrant for the balance 
remaining of the shares of Common Stock purchasable under this Warrant be 
registered in the name of, and delivered to, the undersigned at the address 
stated below.

Address:     
             ------------------------------------------------------------------


                              Signature 
                                        ---------------------------------------
                                        (Signature must conform in all respects
                                        to the name of the holder as written
                                        specified on the face of this Warrant
                                        without any alteration or change
                                        whatsoever)

Dated:  
      ------------------------




<PAGE>

                                                                 EXHIBIT 4.35

THIS WARRANT HAS NOT BEEN REGISTERED WITH THE UNITED STATES SECURITIES AND
EXCHANGE COMMISSION (THE "COMMISSION") OR THE SECURITIES COMMISSION OF ANY STATE
PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER REGULATION D PROMULGATED UNDER
THE SECURITIES ACT OF 1933, AS AMENDED (THE "1933 ACT").  THIS WARRANT SHALL NOT
CONSTITUTE AN OFFER TO SELL NOR A SOLICITATION OF AN OFFER TO BUY THE WARRANT IN
ANY JURISDICTION IN WHICH SUCH OFFER OR SOLICITATION WOULD BE UNLAWFUL.

THIS WARRANT MAY NOT BE SOLD, PLEDGED, TRANSFERRED OR ASSIGNED EXCEPT PURSUANT
TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE 1933 ACT AND UNDER APPLICABLE
STATE SECURITIES LAWS, OR IN A TRANSACTION WHICH IS EXEMPT FROM REGISTRATION
UNDER THE PROVISIONS OF THE 1933 ACT AND UNDER PROVISIONS OF APPLICABLE STATE
SECURITIES LAWS; AND IN THE CASE OF AN EXEMPTION, ONLY IF THE COMPANY HAS
RECEIVED AN OPINION OF COUNSEL THAT SUCH TRANSACTION DOES NOT REQUIRE
REGISTRATION OF THE WARRANT, WHICH OPINION AND WHICH COUNSEL SHALL BE
SATISFACTORY TO THE COMPANY IN ITS SOLE DISCRETION.


                               STOCK PURCHASE WARRANT
No. _____________

                   To Purchase 200,000 Shares of Common Stock of

                                    GALAGEN INC.

      THIS CERTIFIES that, for value received, American Home Products
Corporation, a Delaware corporation (the "Investor"), is entitled, upon the
terms and subject to the conditions hereinafter set forth, at any time on or
after October 15, 1998 and on or prior to October 15, 2005 (the "Termination
Date") but not thereafter, to subscribe for and purchase from GALAGEN INC., a
corporation incorporated in Delaware (the "Company"), TWO HUNDRED THOUSAND
(200,000) shares (the "Warrant Shares") of Common Stock, par value US$0.01 per
share of the Company (the "Common Stock").  The purchase price of one share of
Common Stock (the "Exercise Price") under this Warrant shall be equal to TWO
DOLLARS AND FORTY FIVE CENTS ($2.45).  The Exercise Price and the number of
shares for which the Warrant is exercisable (the "Conversion Shares") shall be
subject to adjustment as provided herein.  This Warrant is being issued in
connection with the Collaboration and License Agreement, by and between the
Company and Investor acting through its Wyeth-Ayerst Laboratories Division and
of even date herewith, the "License Agreement".

      A.  REPRESENTATIONS AND WARRANTIES OF THE COMPANY.  The Company hereby
represents and warrants to, and covenants with, the Investor that the following
are true and correct as of the date hereof.

      (1)  ORGANIZATION; QUALIFICATION.  The Company is a corporation duly
organized and validly existing under the laws of Delaware and is in good
standing under such laws.  The Company has all requisite corporate power and
authority to own, lease and operate its properties and assets, and to carry on
its business as presently conducted.  The Company is qualified to do business as
a foreign corporation in each jurisdiction in the United States in which the
ownership of its property or the nature of its business requires such
qualification, except where failure to so qualify would not have a material
adverse effect on the Company.

      (2)  AUTHORIZATION.  The Company has all requisite corporate right, power
and authority to execute and deliver this Agreement and to consummate the
transactions contemplated hereby.  All corporate action on the part of the
Company, its directors and shareholders necessary for the authorization,
execution, delivery and performance of this Agreement by the Company, the
authorization, sale, issuance and delivery of the Conversion Shares and the
performance of the Company's obligations hereunder has been taken.  This
Agreement has been duly executed and delivered by the Company and constitutes a
legal, valid and binding obligation of the Company enforceable in accordance
with its terms, subject to laws of general application relating to bankruptcy,
insolvency and the relief of debtors and rules of law governing specific
performance, injunctive relief or other equitable remedies, and to limitations
of public policy as they may apply to the indemnification provisions set forth
herein.  Upon their issuance and delivery pursuant to this Agreement, the
Conversion Shares will be validly issued, fully paid and nonassessable and will
be free of any liens or encumbrances except for those imposed by or on behalf of
the Investor, its creditors or agents.


                                       1

<PAGE>

      (3)  NO CONFLICT.  The execution and delivery of this Agreement do not,
and the consummation of the transactions contemplated hereby will not, conflict
with, or result in any violation of, or default (with or without notice or lapse
of time, or both), or give rise to a right of termination, cancellation or
acceleration of any obligation or to a loss of a material benefit, under, any
provision of the Certificate of Incorporation, and any amendments thereto,
Bylaws and any amendments thereto of the Company or any material mortgage,
indenture, lease or other agreement or instrument, permit, concession,
franchise, license, judgment, order, decree statute, law, ordinance, rule or
regulation applicable to the Company, its properties or assets.

      (4)  ACCURACY OF REPORTS AND INFORMATION.  The Company is in compliance,
to the extent applicable, with all reporting obligations under either Section
12(b), 12 (g) or 15(d) of the Securities Exchange Act of 1934, as amended (the
"1934 Act").  The Company has registered its Common Stock pursuant to Section 12
of the 1934 Act and the Common Stock is listed and trades on the NASDAQ National
Market.

      The Company has filed all material required to be filed pursuant to all
reporting obligations under either Section 13(a) or 15(d) of the 1934 Act for a
period of at least twelve (12) months immediately preceding the date hereof (or
for such shorter period that the Company has been required to file such
material).

      (5)  COMMISSION FILINGS/FULL DISCLOSURE.  For a period of at least twelve
(12) months immediately preceding the date hereof, or such shorter period that
the Company has been required to file Reports (as defined below), (i) none of
the Company's filings with the Commission contain any untrue statement of a
material fact or omits to state any material fact required to be stated therein
or necessary to make the statements therein in light of the circumstances under
which they were made, not misleading, and (ii) the Company has timely filed all
requisite forms, reports and exhibits thereto with the Commission.

      (6)  GOVERNMENTAL CONSENT, ETC.  No consent, approval or authorization of
or designation, declaration or filing with any governmental authority on the
part of the Company is required in connection with the valid execution and
delivery of this Agreement.

      B.  REPRESENTATIONS, WARRANTIES AND COVENANTS OF THE INVESTOR.  The
Investor represents and warrants to, and covenants with, the Company that the
following are true and correct as of the date hereof.

      (1)  AUTHORITY.  The Investor has all requisite right, power and
authority to execute and deliver this Agreement and to consummate the
transactions contemplated hereby.  All corporate action on the part of the
Investor, its directors, shareholders, members or partners necessary for the
authorization, execution, delivery and performance of this Agreement with regard
to the purchase of the Warrants as well as the conversion and exercise thereof,
and the performance of the Investor's obligations hereunder, has been taken.
The Investor's signatory has all right, power, authority and capacity to execute
and deliver this Agreement and to consummate the transactions contemplated
hereby. This Agreement has been duly executed and delivered by the Investor and
will constitute the legal, valid and binding obligation of the Investor,
enforceable in accordance with its terms, subject to laws of general application
relating to bankruptcy, insolvency and the relief of debtors and rules of law
governing specific performance, injunctive relief or other equitable remedies,
and to limitations of public policy as they may apply to the indemnification
provisions set forth in this Agreement.

      (2)  INVESTMENT EXPERIENCE.  Investor is an "accredited investor" as
defined in Rule 501(a) under the 1933 Act.  Investor is aware of the Company's
business affairs and financial condition and has had access to and has acquired
sufficient information about the Company, including but not limited to the
Reports.  Investor has such business and financial experience as is required to
give it the capacity to protect its own interests in connection with the
purchase of the Warrants and the Conversion Shares.

      (3)  INVESTMENT INTENT.  Without limiting its ability to resell the
underlying Common Stock pursuant to an effective registration statement,
Investor represents that it is purchasing the Warrants for its own account as
principal for investment purposes, and not with a view to a distribution.
Investor understands that its acquisition of the Warrants have not been
registered under the 1933 Act or registered or qualified under any state
securities law in reliance on specific exemptions therefrom, which exemptions
may


                                       2
<PAGE>

depend upon, among other things, the bona fide nature of Investor's investment
intent as expressed herein.  Investor will not, directly or indirectly, offer,
sell, pledge, transfer or otherwise dispose of (or solicit any offers to buy,
purchase or otherwise acquire or take a pledge of) of the Warrants, except in
compliance with the 1933 Act and any applicable state securities laws, and the
rules and regulations promulgated thereunder.

      (4)  REGISTRATION OR EXEMPTION REQUIREMENTS.  Investor further
acknowledges and understands that the Conversion Shares may not be resold or
otherwise transferred except in a transaction registered under the 1933 Act and
any applicable state securities laws or unless an exemption from such
registration is available.  Investor understands that the Warrants and, if
exercised, the Conversion Shares will be imprinted with a legend that prohibits
the transfer of such securities unless (i) it is registered or such registration
is not required pursuant to an exemption therefrom, and (ii) if the transfer is
pursuant to an exemption from registration other than Rule 144 under the 1933
Act and Investor provides an opinion of Investor's inside counsel to the
Company, which opinion and which counsel shall be reasonably satisfactory to the
Company to the effect that the transaction is so exempt.

      (5)  NO REGISTRATION, REVIEW OR APPROVAL.  The Investor acknowledges and
understand that the limited private offering and sale of the Warrants and the
Conversion Shares pursuant to this Agreement has not been reviewed or approved
by the Commission or by any state securities commission, authority or agency,
and is not registered under the 1933 Act or under the securities or "blue sky"
laws, rules or regulations of any state.  The Investor acknowledges, understands
and agrees that the Conversion Shares are being offered and sold hereunder
pursuant to (i) a private placement exemption to the registration provisions of
the 1933 Act pursuant to Section 3(b) or Section 4(2) of the 1933 Act and
Regulation D promulgated under the 1933 Act, and (ii) a similar exemption to the
registration provisions of applicable state securities laws.

      C.  GENERAL TERMS OF WARRANT.

      (1)  TITLE OF WARRANT.  Prior to the expiration hereof and subject to
compliance with applicable laws, this Warrant and all rights hereunder are
transferable, in whole or in part, at the office or agency of the Company by the
holder hereof in person or by duly authorized attorney, upon surrender of this
Warrant together with the Assignment Form annexed hereto properly endorsed.

      (2)  AUTHORIZATION OF SHARES.  The Company covenants that all shares of
Common Stock which may be issued upon the exercise of rights represented by this
Warrant will, upon exercise of the rights represented by this Warrant, be duly
authorized, validly issued, fully paid and nonassessable and free from all
taxes, liens and charges in respect of the issue thereof (other than taxes in
respect of any transfer occurring contemporaneously with such issue).

      (3)   EXERCISE OF WARRANT.  Except as provided in Section C(4) herein,
exercise of the purchase rights represented by this Warrant may be made at any
time or times, before the close of business on the Termination Date, or such
earlier date on which this Warrant may terminate as provided in this Warrant, by
the surrender of this Warrant and the Notice of Exercise Form annexed hereto
duly executed, at the office of the Company (or such other office or agency of
the Company as it may designate by notice in writing to the registered holder
hereof at the address of such holder appearing on the books of the Company) and
upon payment of the Exercise Price of the shares thereby; whereupon the holder
of this Warrant shall be entitled to receive a certificate for the number of
shares of Common Stock so purchased.  Certificates for shares purchased
hereunder shall be delivered to the holder hereof within ten (10) business days
after the date on which this Warrant shall have been exercised as aforesaid.
Payment of the Exercise Price of the shares may be by certified check or
cashier's check or by wire transfer to an account designated by the Company in
an amount equal to the Exercise Price multiplied by the number of Warrant
Shares.

      (4)  NO FRACTIONAL SHARES OR SCRIP.  No fractional shares of Common Stock
(or other securities deliverable hereunder) or scrip shall be issued to any
Holder in connection with the exercise of this Warrant. Instead of any
fractional share of Common Stock (or other securities deliverable hereunder)
that would otherwise be issuable to such Holder, the Company shall pay to such
Holder a cash adjustment in respect of such fractional interest in an amount
equal to such fractional interest multiplied by the


                                       3

<PAGE>

Exercise Price per share of Common Stock (or other securities deliverable
hereunder) on the date of such exercise.

      (5)  CHARGES, TAXES AND EXPENSES.  Issuance of certificates for shares of
Common Stock upon the exercise of this Warrant shall be made without charge to
the holder hereof for any issue or transfer tax or other incidental expense in
respect of the issuance of such certificate, all of which taxes and expenses
shall be paid by the Company, and such certificates shall be issued in the name
of the holder of this Warrant or in such name or names as may be directed by the
holder of this Warrant; PROVIDED, HOWEVER, that in the event certificates for
shares of Common Stock are to be issued in a name other than the name of the
holder of this Warrant, this Warrant when surrendered for exercise shall be
accompanied by the Assignment Form attached hereto duly executed by the holder
hereof; and PROVIDED FURTHER, that upon any transfer involved in the issuance or
delivery of any certificates for shares of Common Stock, the Company may
require, as a condition thereto, the payment of a sum sufficient to reimburse it
for any transfer tax incidental thereto.

      (6)  CLOSING OF BOOKS.  The Company will not close its shareholder books
or records in any manner which prevents the timely exercise of this Warrant for
a period of time in excess of five (5) trading days per year.

      (7)  NO RIGHTS AS SHAREHOLDER UNTIL EXERCISE.  This Warrant does not
entitle the holder hereof to any voting rights or other rights as a shareholder
of the Company prior to the exercise thereof.  Upon the surrender of this
Warrant and the payment of the aggregate Exercise Price, the Warrant Shares so
purchased shall be and be deemed to be issued to such holder as the record owner
of such shares as of the close of business on the later of the date of such
surrender or payment.

      (8)   ASSIGNMENT AND TRANSFER OF WARRANT.  This Warrant may be assigned
by the surrender of this Warrant and the Assignment Form annexed hereto duly
executed at the office of the Company (or such other office or agency of the
Company as it may designate by notice in writing to the registered holder hereof
at the address of such holder appearing on the books of the Company); provided,
however, that the Company may require, as a condition thereto, the payment of a
sum sufficient to reimburse it for any expenses of transfer incidental thereto
and that this Warrant may not be resold or otherwise transferred except (i) in a
transaction registered under the 1933 Act, or (ii) in a transaction pursuant to
an exemption, if available, from such registration and whereby, if requested by
the Company, an opinion of counsel reasonably satisfactory to the Company is
obtained by the holder of this Warrant to the effect that the transaction is so
exempt.

      (9)   LOSS, THEFT, DESTRUCTION OR MUTILATION OF WARRANT.  The Company
represents and warrants that upon receipt by the Company of evidence reasonably
satisfactory to it of the loss, theft, destruction or mutilation of this Warrant
certificate or any stock certificate relating to the Warrant Shares, and in case
of loss, theft or destruction, of indemnity or security reasonably satisfactory
to it, and upon reimbursement to the Company of all reasonable expenses
incidental thereto, and upon surrender and cancellation of such Warrant or stock
certificate, if mutilated, the Company will make and deliver a new Warrant or
stock certificate of like tenor and dated as of such cancellation, in lieu of
such Warrant or stock certificate.

      (10)  SATURDAYS, SUNDAYS, HOLIDAYS, ETC.  If the last or appointed day
for the taking of any action or the expiration of any right required or granted
herein shall be a Saturday, Sunday or a legal holiday, then such action may be
taken or such right may be exercised on the next succeeding day not a legal
holiday.

      (11)  EFFECT OF CERTAIN EVENTS.

      (a)  If at any time the Company proposes (i) to sell or otherwise
convey all or substantially all of its assets or (ii) to effect a transaction
(by merger or otherwise) in which more than 50% of the voting power of the
Company is disposed of (collectively, a "Sale or Merger Transaction"), in which
the consideration to be received by the Company or its shareholders consists
solely of cash, then the Warrant shall terminate if the Warrant has not been
exercised by the effective date of such transaction, the Company shall give the
holder of this Warrant thirty (30) days' notice of such termination and of the
proposed effective date of the transaction.

      (b)  In case the Company shall at any time effect a Sale or Merger
Transaction in which the consideration to be received by the Company or its
shareholders consists in part


                                       4
<PAGE>

of consideration other than cash, the holder of this Warrant shall have the
right thereafter to purchase, by exercise of this Warrant and payment of the
aggregate Exercise Price in effect immediately prior to such action, the kind
and amount of shares and other securities and property which it would have owned
or have been entitled to receive after the happening of such transaction had
this Warrant been exercised immediately prior thereto.

       (12)  REGISTRATION OF COMMON STOCK.

       12.1(a)  Demand Registration.  Upon the written request of the Investor,
which request will state the intended method of disposition by the Investor and
will request that the Company effect the registration under the 1933 Act of all
or part of the Conversion Shares, the Company will, within 10 days after receipt
of such request, give written notice of such requested registration to all
record holders of securities who have registration rights, and thereupon (except
as expressly provided herein) will use its reasonable best efforts to effect the
registration ("Demand Registration") under the 1933 Act of (x) the shares of
Conversion Shares included in the initial request for registration (for
disposition in accordance with the intended method of disposition stated in such
request) and (y) all other shares of securities, the record holders of which
have made written request to the Company for registration thereof within 30 days
after the receipt of such written notice from the Company, provided that:

             (a)  except as set forth below, the Company shall be required to
effect no more than three Demand Registrations hereunder and Investor shall be
required to register all Conversion Shares underlying this Warrant held at the
time of such demand which shall be no less than 50,000 shares of Common Stock at
a time; provided that the Company shall not be required to effect more than one
registration during any one-year period pursuant to this Section 12.1;

             (b)  if the Investor intends to sell its Conversion Shares by
means of an underwriting (whether on a "best efforts" or a "firm commitment"
basis), it shall so advise the Company as part of its request, and the Company
shall include such information in the notice to the other record holders of
securities who have registration rights.  In that event, such other record
holders shall have the right to include their shares of such registrable
securities in the underwriting.  The managing underwriter for such offering
shall be selected by the Investor, who shall be reasonably acceptable to the
Company;

             (c)  if a Demand Registration under this Section 12.1 is in
connection with an underwritten public offering, and if the managing
underwriters advise the Company in writing that in their reasonable opinion the
amount of Conversion Shares, and securities the holders of which have
registration rights requested to be included in such registration exceeds the
amount of such securities which can be successfully sold in such offering, the
Company will nevertheless include in such registration, prior to the inclusion
of any securities which are not Conversion Shares or share of Common Stock with
similar registration rights which are to be included in such registration, the
amount of Conversion Shares and other shares of Common Stock with similar
registration rights which in the opinion of such underwriters can be sold, pro
rata among the holders of Conversion Shares and other Common Stock requesting
inclusion with similar registration rights on the basis of the number of shares
of Conversion Shares and other Common Stock requested to be included in such
registration; provided, however, that if the Investor is unable to include in
such offering at least seventy-five percent (50%) of the Conversion Shares
sought to be registered in a Demand Registration under this Section 12.1, the
Investor will be entitled to an additional Demand Registration under this
Section;

             (d)  if the Company shall furnish to the Investor requesting a
registration pursuant to this Section 12.1 a certificate signed by the Chief
Executive Officer of the Company stating that, in the good faith judgment of the
Board of Directors of the Company, it would be materially detrimental to the
Company for a registration statement to be filed as requested, the Company shall
have the right to defer such filing for a period of not more than 120 days after
receipt of the initial request for registration under this Section 12.1;
provided, however, that the Company may not utilize this right more than once in
any one-year period; and

             (e)  registrations under this Section 12.1 will be on a form
reasonably acceptable to Investor (or it may withdraw its demand without losing
such demand right) permitted by the rules and regulations of the Commission
selected by the underwriters if the Demand Registration is in connection with an
underwritten public offering or otherwise


                                       5
<PAGE>

by the Company, provided, however, that within 15 days of notice from the
Company of the form selected, the Investor shall confirm in writing to the
Company that the form selected for registration is reasonably acceptable to the
Investor and the Investor shall thereafter be precluded from withdrawing its
demand for such registration on the basis of this Section 12.1(f).


       12.1(b)  Incidental Registrations.

             (a)  If the Company at any time proposes to register any of its
securities under the 1933 Act (other than pursuant to Section 12.1(a) hereof,
whether of its own accord or at the demand of any holder of securities pursuant
to an agreement with respect to the registration thereof (provided such
agreement does not prohibit third parties from including additional securities
in such registration), and if the form of registration statement proposed to be
used may be used for the registration of Conversion Shares (and provided such
registration statement in connection with a transaction contemplated by Rule
145(a) under the 1993 Act, or is not on a Form S-4 or S-8), the Company will
give notice to the Investor not less than 5 days nor more than 60 days prior to
the filing of such registration statement of its intention to proceed with the
proposed registration (the "Incidental Registration"), and, upon the written
request of the Investor made within 5 days after the receipt of any such notice
(which request will specify the Conversion Shares intended to be disposed of by
such holder and state the intended method of disposition thereof), the Company
will use its reasonable best efforts to cause all Conversion Shares as to which
registration has been requested to be registered under the 1933 Act, provided
that if such registration is in connection with an underwritten public offering,
the Company may require that the Conversion Shares to be included in such
registration be offered upon the same terms and conditions as apply to any other
securities included in such registration.  Notwithstanding the foregoing
provisions or any other obligation of the Company contained in this Section 12,
the Company may withdraw or delay any Registration Statement without incurring
any liability to the holder of Conversion Shares.  This provision shall expire
at such time as Investor may freely sell all Conversion Shares without
registration under the 1933 Act and Investor holds Warrants or Conversion Shares
which number less than 75,000 shares of Common Stock.

             (b)  If an Incidental Registration is a primary registration on
behalf of the Company and is in connection with an underwritten public offering,
and if the managing underwriters advise the Company in writing that in their
reasonable opinion the amount of securities requested to be included in such
registration (whether by the Company, the Investor or other holders of its
securities pursuant to any other rights granted by the Company to demand
inclusion of any such securities in such registration) exceeds the amount of
such securities which can be successfully sold in such offering, the Company
will include in such registration the amount of securities requested to be
included which in the opinion of such underwriters can be sold, in the following
order (i) first, all of the securities the Company proposes to sell, and (ii)
second, all of the Conversion Shares and other shares of Common Stock with
similar registration rights requested to be included in such registration, pro
rata among the holders thereof on the basis of the number of shares requested to
be included in such registration.

             (c)  If an Incidental Registration is a secondary registration on
behalf of holders of securities of the Company and is in connection with an
underwritten public offering, and if the managing underwriters advise the
Company in writing that in their reasonable opinion the amount of securities
requested to be included in such registration (whether by such holders, by the
Investor or by holders of its securities pursuant to any other rights granted by
the Company to demand inclusion of securities in such registration) exceeds the
amount of such securities which can be sold in such offering, the Company will
include in such registration the amount of securities requested to be included
which in the opinion of such underwriters can be sold, in the following order
(i) first, all of the securities requested to be included by holders initially
demanding or requesting such registration, (ii) second, all of the Conversion
Shares and other shares of Common Stock with similar registration rights
requested to be included in such registration, pro rata among the holders
thereof on the basis of the number of shares requested to be included in such
registration, and (iii) third, any other securities requested to be included in
such registration, pro rata among the holders thereof on the basis of the amount
of such securities then owned by such holders.

              (d)  Notwithstanding anything to contrary contained in this
Section 12, if securities are registered by the Company pursuant to Section 7.1
of that certain Stock and


                                       6
<PAGE>

Warrant Purchase Agreement dated March 20, 1995 between the Company and Chiron
Corporation, then Conversion Shares shall be included in such offering and
Registration Statement only to the extent that inclusion of the Conversion
shares will not reduce the amount of securities owned by Chiron Corporation to
be registered in such offering.

              (e)  Any Conversion Shares which are not included in an
underwritten offering pursuant to the foregoing provisions of this Section (and
all other Conversion Shares held by the Investor) shall be withheld from the
market (which shall not include any private sale transaction, provided the
purchaser in such private sale agrees in writing to be bound by the terms of
this subparagraph (e)) by the Investor for a period not to exceed 120 days, if
the underwriter deems such withholding from the market is reasonably necessary
and Investor shall agree to execute an agreement to this effect which is in
customary form; provided, however, that all Executive Officers (as defined under
the Securities Exchange Act of 1934, as amended) of the Company who are not
registering shares in such underwritten offering and other investors similarly
situated with the Investor with respect to registration rights each execute
similar agreements to refrain from selling shares held on the market for the
same time period.

       12.2  Registration Procedures.  If and whenever the Company is required
to use its reasonable best efforts to effect or cause the registration of any
Conversion Shares under the 1933 Act as provided in this Section (C)(12), the
Company will, as expeditiously as possible:

              (a)  prepare and file with the Commission a registration statement
with respect to such Conversion Shares and use its reasonable best efforts
(which shall not, in any case, require the Company to incur any unreasonable
expense) to cause such registration statement to become effective;

              (b)  prepare and file with the Commission such amendments and
supplements to such registration statement and the prospectus used in connection
therewith as may be necessary to keep such registration statement effective for
a period of not less than three months or such shorter period in which the
disposition of all securities in accordance with the intended methods of
disposition by the seller or sellers thereof set forth in such registration
statement shall be completed, and to comply with the provisions of the 1933 Act
(to the extent applicable to the Company) with respect to such dispositions;

              (c)  furnish to the Investor such number of copies of such
registration statement and of each such amendment and supplement thereto (in
each case including all exhibits), such number of copies of the prospectus
included in such registration statement (including each preliminary prospectus),
in conformity with the requirements of the 1933 Act, and such other documents,
as the Investor may reasonably request, in order to facilitate the disposition
of the Conversion Shares owned by the Investor;


              (d)  use its reasonable best efforts (which shall not, in any
case, require the Company to incur any unreasonable expense) to register or
qualify such Conversion Shares covered by such registration statement under such
other securities or blue sky laws of such jurisdictions as the Investor
reasonably requests, except that the Company will not for any such purpose be
required to qualify generally to do business as a foreign corporation in any
jurisdiction wherein it would not, but for the requirements of this Section
(C)(12.2)(d) be obligated to be qualified, to subject itself to taxation in any
such jurisdiction, or to consent to general service of process in any such
jurisdiction;

              (e)  provide a transfer agent and registrar for all such 
Conversion Shares covered by such registration statement not later than the 
effective date of such registration statement;

              (f)  notify the Investor at any time when a prospectus relating
thereto is required to be delivered under the 1933 Act, of the happening of any
event as a result of which the prospectus included in such registration
statement contains an untrue statement of a material fact or omits any fact
necessary to make the statements therein not misleading;

              (g)  use its reasonable best efforts to cause all such Conversion
Shares to be listed on each securities exchange on which similar securities
issued by the Company are then listed;


                                       7

<PAGE>

              (h)  use its reasonable best efforts to obtain a cold comfort
letter from the Company's independent public accountants in customary form and
covering such matters of the type customarily covered by cold comfort letters in
such transactions;

              (i)  enter into an underwriting agreement in customary form and if
requested by the managing underwriter in an underwritten public offering and if
deemed advisable by the Company, make the Company management reasonably
available to participate in "Roadshows" with respect to such offering (at the
expense of Investor and any other parties who are registering securities in such
underwritten offering in proportion to the dollar value of securities being sold
by the Investor and all persons who are selling registrable Common Stock which
shall only include out-of-pocket expenses and not salaries or professional
fees); and

              (j)  subject to Investor executing an appropriate Confidentiality
agreement, make available for inspection by the Investor, any underwriter
participating in any disposition pursuant to such registration statement, and
any attorney, accountant or other agent retained by the Investor and/or
representative of the Investor or underwriter, all reasonably requested
financial and other records, pertinent corporate documents and properties of the
Company, and cause the Company's officers, directors and employees to supply all
information reasonably requested by the Investor, underwriter, attorney,
accountant or agent in connection with such registration statement.

       12.3  Registration and Selling Expenses.

              (a)  All expenses incurred by the Company in connection with the
Company's performance of or compliance with this Section (C)(12), including,
without limitation (A) all registration and filing fees (including all expenses
incident to filing with the National Association of Securities Dealers, Inc.),
(B) blue sky fees and expenses, (C) all printing expenses and (D) all fees and
disbursements of counsel and accountants for the Company (including the expenses
of any audit of financial statements) retained by the Company (all such expenses
being herein called "Registration Expenses"), will be paid by the Company except
as otherwise expressly provided in this Section (C)(12.3).

              (b)  The Company will, in any event, in connection with any
registration statement, pay its internal expenses (including, without
limitation, all salaries and expenses of its officers and employees performing
legal, accounting or other duties in connection therewith and expenses of audits
of year-end financial statements), and the expenses and fees for listing the
securities to be registered on one or more securities exchanges on which similar
securities issued by the Company are then listed.

              (c)  The Company shall bear the Registration Expenses of each
Incidental Registration hereunder.

              (d)  Fees and disbursement of counsel and accountants of Investor,
underwriters discounts and commissions relating to the Conversion Shares
included in any offering by Investor shall be borne by Investor.  In conjunction
with any Demand Registration which is effected in the form of an underwritten
public offering, however, Investor agrees that it shall also pay in proportion
to the dollar value of securities being sold by the Investor and all persons who
are selling registrable Common Stock, all reasonable fees for counsel to the
underwriters effecting such underwritten public offering.

       12.4  Other Conditions Relating to Registrations.  Except as otherwise
provided in this Agreement, the Company shall not be required to furnish any
audited financial statements at the request of the Investor other than those
statements customarily prepared at the end of its fiscal year, unless the
Investor shall agree to reimburse the Company for the out-of-pocket costs
incurred by the Company in the preparation of such other audited financial
statements.

       12.5  Indemnification.

              (a)  The Company hereby agrees to indemnify, to the extent
permitted by law, the Investor, its officers, directors and employees, and each
person, if any, who controls such holder within the meaning of the 1933 Act,
against all losses, claims, damages, liabilities and expenses under the 1933
Act, applicable state securities laws, common law or otherwise (including, as
incurred, legal and other expenses reasonably


                                       8

<PAGE>

incurred in connection with investigating, preparing or defending any such
claim, except to the extent limited by Section (C)(12.5)(c) below) caused by any
untrue statement or alleged untrue statement of a material fact contained in any
registration statement or prospectus (and as amended or supplemented if the
Company has furnished any amendments or supplements thereto) which registration
statement or prospectus shall be prepared in connection with a Demand
Registration or an Incidental Registration, or caused by any omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein not misleading, except insofar as such
losses, claims, damages, liabilities or expenses are caused by any untrue
statement or alleged untrue statement contained in or by any omission or alleged
omission from information furnished in writing to the Company by such holder for
the particular purpose of use in connection with a Demand Registration or an
Incidental Registration, provided the Company will not be liable pursuant to
this Section (C)(12.5) if such losses, claims, damages, liabilities or expenses
have been caused by the Investor's failure to deliver a copy of the registration
statement or prospectus, or any amendments or supplements thereto, after the
Company has furnished the Investor with a sufficient number of copies of the
same.

              (b)  In connection with any registration statement in which the
Investor is participating, the Investor shall furnish to the Company in writing
such information as is reasonably requested by the Company for the particular
purpose of use in any such registration statement or prospectus and shall
indemnify, to the extent permitted by law, the Company, its directors, officers
and employees and each person, if any, who controls the Company within the
meaning of the 1933 Act, against any losses, claims, damages, liabilities and
expenses under the 1933 Act, applicable state securities laws, common law or
otherwise (including, as incurred, legal and other expenses reasonably incurred
in connection with investigating, preparing or defending any such claim, except
to the extent limited by Section (C)(12.5)(c) below) caused by any untrue
statement or alleged untrue statement of a material fact or any omission or
alleged omission of a material fact required to be stated in the registration
statement or prospectus or any amendment thereof or supplement thereto or
necessary to make the statements therein not misleading, but only to the extent
such losses, claims, damages, liabilities or expenses are caused by an untrue
statement or alleged untrue statement contained in or by an omission or alleged
omission from information so furnished in writing by the Investor for the
particular purpose of use in connection with the Demand Registration or
Incidental Registration.  If the offering pursuant to any such registration is
made through underwriters, the Investor agrees to enter into an underwriting
agreement in customary form with such underwriters.  Notwithstanding the
foregoing, the Investor shall not be liable under this Section (C)(12.5)(b) for
any amounts exceeding the product of (i) the offering price per share of
Conversion Shares pursuant to the registration statement in which the Investor
is participating (less any underwriting discounts or commissions which reduce
the amount the Investor receives), multiplied by (ii) the number of shares of
Conversion Shares being sold by the Investor pursuant to such registration
statement; it being understood that the Company shall not be in breach of this
Agreement in the event that it is unable to secure an underwriter which is
willing to agree the limitations set forth in this sentence.

              (c)  Promptly after receipt by an indemnified party under Section
(C)(12.5)(a) or Section (C)(12.5)(b) of notice of the commencement of any action
or proceeding, such indemnified party will, if a claim in respect thereof is or
is to be made against the indemnifying party under such Section, notify the
indemnifying party in writing of the commencement thereof; but the omission so
to notify the indemnifying party will not relieve it from any liability which it
may have to any indemnified party otherwise than under such Section.  In case
any such action or proceeding is brought against any indemnified party, and it
notifies the indemnifying party of the commencement thereof, the indemnifying
party will be entitled to participate therein, and, to the extent that it
wishes, jointly with any other indemnifying party similarly notified, to assume
the defense thereof, with counsel reasonably satisfactory to such indemnified
party, and after notice from the indemnifying party to such indemnified party of
its election so to assume the defense thereof, the indemnifying party will not
be liable to such indemnified party under such Section for any legal or any
other expenses subsequently incurred by such indemnified party in connection
with the defense thereof (other than reasonable costs of investigation) unless
incurred at the written request of the indemnifying party.  Notwithstanding the
above, the indemnified party will have the right to employ one counsel
(exclusive of local counsel) of its own choice in any such action or proceeding
if the indemnified party has reasonably concluded that there may be defenses
available to it which are different from or additional to those of the
indemnifying party, or counsel to the indemnified party is of the opinion that
it would not be desirable for


                                       9
<PAGE>

the same counsel to represent both the indemnifying party and the indemnified
party because such representation might result in a conflict of interest (in
either of which cases the indemnifying party will not have the right to assume
the defense of any such action or proceeding on behalf of the indemnified party
or parties and such legal and other expenses will be borne by the indemnifying
party).  An indemnifying party will not be liable to any indemnified party for
any settlement of any such action or proceeding effected without the consent of
such indemnifying party which consent shall not be unreasonably withheld.

              (d)  If the indemnification provided for in Section (C)(12.5)(a)
or Section (C)(12.5)(b) is unavailable under applicable law to an indemnified
party in respect of any losses, claims, damages or liabilities referred to
therein, then each applicable indemnifying party, in lieu of indemnifying such
indemnified party, shall contribute to the amount paid or payable by such
indemnified party as a result of such losses, claims, damages or liabilities in
such proportion as is appropriate to reflect the relative fault of the Company
on the one hand and of the Investor on the other in connection with the
statements or omissions which resulted in such losses, claims, damages, or
liabilities, as well as any other relevant equitable considerations.  The
relative fault of the Company on the one hand and of the Investor on the other
shall be determined by reference to, among other things, whether the untrue or
alleged untrue statement of a material fact or the omission to state a material
fact relates to information supplied by the Company or by the Investor and the
parties' relative intent, knowledge, access to information and opportunity to
correct or prevent such statement or omission.  The amount paid or payable by a
party as a result of the losses, claims, damages and liabilities referred to
above shall be deemed to include, subject to the limitations set forth in
Section (C)(12.5)(c), any legal or other fees or expenses reasonably incurred by
such party in connection with investigating or defending any action or claim.
No person guilty of fraudulent misrepresentation (within the meaning of Section
11(f) of the 1933 Act) will be entitled to contribution from any person who is
not guilty of such fraudulent misrepresentation.

              (e)  Promptly after receipt by the Company or the Investor of
notice of the commencement of any action or proceeding, such party will, if a
claim for contribution in respect thereof is to be made against another party
(the "contributing party"), notify the contributing party of the commencement
thereof; but the omission so to notify the contributing party will not relieve
it from any liability which it may have to any other party other than for
contribution hereunder.  In case any such action, suit, or proceeding is brought
against any party, and such party notifies a contributing party of the
commencement thereof, the contributing party will be entitled to participate
therein with the notifying party and any other contributing party similarly
notified.  No party shall be liable for contribution with regard to the
settlement of any action or proceeding effected without its consent.

       (13)  ADJUSTMENTS OF EXERCISE PRICE AND NUMBER OF WARRANT SHARES.  The
number and kind of securities purchasable upon the exercise of this Warrant and
the Exercise Price shall be subject to adjustment from time to time upon the
happening of any of the following.

In case the Company shall (i) declare or pay a dividend in shares of Common
Stock or make a distribution in shares of Common Stock to holders of its
outstanding Common Stock, (ii) subdivide its outstanding shares of Common Stock,
(iii) combine its outstanding shares of Common Stock into a smaller number of
shares of Common Stock or (iv) issue any shares of its capital stock in a
reclassification of the Common Stock, then the number of Warrant Shares
purchasable upon exercise of this Warrant immediately prior thereto shall be
adjusted so that the holder of this Warrant shall be entitled to receive the
kind and number of Warrant Shares or other securities of the Company which he
would have owned or have been entitled to receive had such Warrant been
exercised in advance thereof.  Upon each such adjustment of the kind and number
of Warrant Shares or other securities of the Company which are purchasable
hereunder, the holder of this Warrant shall thereafter be entitled to purchase
the number of Warrant Shares or other securities resulting from such adjustment
at an Exercise Price per such Warrant Share or other security obtained by
multiplying the Exercise Price in effect immediately prior to such adjustment by
the number of Warrant Shares purchasable pursuant hereto immediately prior to
such adjustment and dividing by the number of Warrant Shares or other securities
of the Company resulting from such adjustment.  An adjustment made pursuant to
this paragraph shall become effective immediately after the effective date of
such event retroactive to the record date, if any, for such event.


                                      10

<PAGE>

       (14)   ANTI-DILUTION

       14.1  Reorganization Event.  Except as set forth in Section (C)(11)(a),
in case of any reorganization event including any merger, sale of substantially
all of the assets of the Company, the Company shall, as a condition precedent to
the consummation of the transaction constituting, or announced as, such
Reorganization Event, cause effective provisions to be made so that the Holder
shall have the right immediately thereafter, by exercising this Warrant, to
receive the aggregate amount and kind of shares of stock and other securities
and property that were receivable upon such Reorganization Event by a holder of
the number of shares of Common Stock that would have been received immediately
prior to such Reorganization Event upon exercise of this Warrant.

       14.2  Carryover.  Notwithstanding any other provision of this Section
(C)(14.2), no adjustment shall be made to the number of shares of Common Stock
(or other securities deliverable hereunder) to be delivered to each Holder (or
to the Exercise Price) if such adjustment would represent less than one percent
of the number of shares to be so delivered, but any such adjustment shall be
carried forward and shall be made at the time and together with the next
subsequent adjustment which, together with any adjustments so carried forward,
shall amount to one percent or more of the number of shares to be so delivered.

       14.3  Notices of Certain Events.  If at any time after the date hereof
and before the expiration of the Exercise Period:

              (a)  the Company authorizes the issuance to all holders of its
Common Stock of (i) rights or warrants to subscribe for or purchase shares of
its Common Stock or (ii) any other subscription rights or warrants;

              (b)  the Company authorizes the distribution to all holders of its
Common Stock of evidences of its indebtedness or assets (other than cash
dividends);

              (c)  there shall be any capital reorganization of the Company or
reclassification of the Common Stock (other than a change in par value of the
Common Stock or an increase in the authorized capital stock of the Company not
involving the issuance of any shares thereof) or any consolidation or merger to
which the Company is a party (other than a consolidation or merger with a
subsidiary in which the Company is the continuing corporation and that does not
result in any reclassification or change in the Common Stock outstanding) or a
conveyance or transfer of all or substantially all of the properties and assets
of the Company;

              (d)  there shall be any voluntary or involuntary dissolution,
liquidation or winding-up of the Company; or

              (e)  there shall be any other event that would result in an
adjustment pursuant to this Section (C)(14.3) in the Exercise Price or the
number of Warrant Shares that may be purchased upon the exercise hereof;

       the Company will cause to be mailed to the Holder, at least fifteen days
(or ten days in any case specified in clauses (a) or (b) above) before the
applicable record or effective date hereinafter specified, a notice stating (i)
the date as of which the holders of Common Stock of record entitled to receive
any such rights, warrants or distributions is to be determined, or (ii) the date
on which any such reorganization, reclassification, consolidation, merger,
conveyance, transfer, dissolution, liquidation or winding-up is expected to
become effective, and the date as of which it is expected that holders of Common
Stock of record will be entitled to exchange their shares of Common Stock for
securities or other property, if any, deliverable upon such reorganization,
reclassification, consolidation, merger, conveyance, transfer, dissolution,
liquidation or winding-up.

       14.4  Failure to Give Notice.  The failure to give the notice required by
Subsection (C)(14.3) or any defect therein shall not affect the legality or
validity of any distribution right, warrant, consolidation, merger, conveyance,
transfer, dissolution, liquidation or winding-up or the vote upon any such
action.

       (15)  NOTICE OF ADJUSTMENT.  Whenever the number of Warrant Shares or
number or kind of securities or other property purchasable upon the exercise of
this Warrant or the Exercise Price is adjusted, as herein provided, the Company
shall promptly mail by


                                      11

<PAGE>

registered or certified mail, return receipt requested, to the holder of this
Warrant notice of such adjustment or adjustments setting forth the number of
Warrant Shares (and other securities or property) purchasable upon the exercise
of this Warrant and the Exercise Price of such Warrant Shares (and other
securities or property) after such adjustment, setting forth a brief statement
of the facts requiring such adjustment and setting forth the computation by
which such adjustment was made.  Such notice, in absence of manifest error,
shall be conclusive evidence of the correctness of such adjustment.

       (16)  AUTHORIZED SHARES.  The Company covenants that during the period
the Warrant is outstanding, it will reserve from its authorized and unissued
Common Stock a sufficient number of shares to provide for the issuance of the
Warrant Shares upon the exercise of any purchase rights under this Warrant.  The
Company further covenants that its issuance of this Warrant shall constitute
full authority to its officers who are charged with the duty of executing stock
certificates to execute and issue the necessary certificates for the Warrant
Shares upon the exercise of the purchase rights under this Warrant.  The Company
will take all such reasonable action as may be necessary to assure that such
Warrant Shares may be issued as provided herein without violation of any
applicable law or regulation, or of any requirements of the Nasdaq National
Market or any domestic securities exchange upon which the Common Stock may be
listed.

       (17)  MISCELLANEOUS.

       (a)  ISSUE DATE; JURISDICTION.  The provisions of this Warrant shall be
construed and shall be given effect in all respects as if it had been issued and
delivered by the Company on the date hereof.  This Warrant shall be binding upon
any successors or assigns of the Company.  This Warrant shall constitute a
contract under the laws of Delaware without regard to its conflict of law,
principles or rules.

       (b)  RESTRICTIONS.  The holder hereof acknowledges that the Warrant
Shares acquired upon the exercise of this Warrant, if not registered, will have
restrictions upon resale imposed by state and federal securities laws.

       (c)  MODIFICATION AND WAIVER.  This Warrant and any provisions hereof may
be changed, waived, discharged or terminated only by an instrument in writing
signed by the party against which enforcement of the same is sought.

       (d)  NOTICES.  Any notice, request or other document required or
permitted to be given or delivered to the holders hereof by the Company shall be
delivered or shall be sent by certified or registered mail, postage prepaid, to
each such holder at its address as shown on the books of the Company or to the
Company at the address set forth in the Agreement.

       (e) COMPETITION LAWS. At the time of exercise of this Warrant, it will be
necessary for the Company to undertake a review of such exercise to determine if
a filing with the U.S. Federal Trade Commission and the U.S. Department of
Justice under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as
amended, and the rules promulgated thereunder (16 C.F.R. Sections 801.1 ET SEQ.)
is required, and if such filing is required, the Company and Investor (or its
successor) shall promptly make any such required filings.

       IN WITNESS WHEREOF, the Company has caused this Warrant to be executed by
its officer thereunto duly authorized.

Dated: October 15, 1998

                               GALAGEN INC.


                       BY:     /s/ Gregg A. Waldon
                               -----------------------------------
                               Chief Financial Officer


                                      12

<PAGE>


                              FORM OF EXERCISE NOTICE

            To be Executed by the Holder of this Warrant if such Holder

               Desires to Exercise this Warrant in Whole or in Part:


To:    GalaGen Inc. (the "Company")

             The undersigned
                              ---------------------------

                       Please insert Social Security or other
                          identifying number of Purchaser

                              __________-______-_________

hereby irrevocably elects to exercise the right of purchase represented by this
Warrant for, and to purchase thereunder, _______________________shares of the
Common Stock provided for therein and tenders payment herewith to the order of
the Company in the amount of $_______________________, such payment being made
as provided on the face of the Warrant.

       In order to induce the Company to consent to the exercise of this
Warrant, the undersigned hereby represents, warrants and agrees as follows:

       1.    The undersigned acknowledges that neither this Warrant nor any of
the shares of Common Stock issuable upon exercise hereof have been registered
under the Securities Act of 1933, as amended (the "Act"), or any state
securities laws and that, accordingly, this Warrant may be exercised and the
share of Common Stock issued pursuant to this exercise may only be transferred
in accordance with the terms of this Warrant.

       2.    The undersigned is acquiring the shares of Common Stock issued
pursuant to this exercise for investment and not with a view to distribution of
such shares within the meaning of the Act and the rules and regulations
thereunder.

       3.    The undersigned is an "accredited investor" as defined in Rule
501(a) of Regulation D promulgated under the Act.


                                      13

<PAGE>


                          FORM OF WARRANT TRANSFER LETTER


To:    GalaGen Inc.


Ladies and Gentlemen:
        The undersigned is a proposed transferee of the warrant (the 
"Warrant") to purchase ____________________ shares of Common Stock, no par 
value ("Common Stock"), of GalaGen, Inc. a Delaware corporation (the 
"Company"), currently registered in the name of________________________.  In 
order to induce the Company to consent to the transfer of the Warrant, the 
undersigned hereby represents, warrants and agrees as follows;


       1.    The undersigned acknowledges that neither the Warrant nor any of
the shares of Common Stock issuable upon exercise thereof have been registered
under the Securities Act of 1933, as amended (the "Act"), or any state
securities laws and that, accordingly, the Warrant and such shares of Common
Stock may only be transferred in accordance with the terms of the Warrant.

       2.    The undersigned is acquiring the Warrant for investment and not
with a view to distribution of the Warrant or the shares of Common Stock
issuable upon exercise thereof within the meaning of the Act and the rules and
regulations thereunder.

       3.    The undersigned is an "accredited investor" as defined in Rule
501(a) of Regulation D promulgated under the Act.



                                   Signature:
                                             ------------------------------


                                   Address:
                                             ------------------------------


                                   Date:
                                             ------------------------------


                                      14

<PAGE>

      The undersigned requests that certificates for such shares of Common
Stock be issued as follows:



Name:
               ----------------------------------------------------------------


Address:
               ----------------------------------------------------------------


Deliver to:
               ----------------------------------------------------------------


Address:
               ----------------------------------------------------------------


and, if such number of shares of Common Stock shall not be all the shares of
Common Stock purchasable hereunder, that a new Warrant for the balance remaining
of the shares of Common Stock purchasable under this Warrant be registered in
the name of, and delivered to, the undersigned at the address stated below.


Address:
               ----------------------------------------------------------------


                         Signature:
                                        ---------------------------------------
                                        (Signature must conform in all respects
                                        to the name of the holder as written
                                        specified on the face of this Warrant
                                        without any alteration or change
                                        whatsoever)


Date:
       ----------------------------


                                      15


<PAGE>

                                          
                                          
                                          
                                          
                                          
                                          
                                          
                                          
                        COLLABORATION AND LICENSE AGREEMENT
                                          
                                   BY AND BETWEEN
                                          
                                    GALAGEN INC.
                                          
                                        AND
                                          
                         AMERICAN HOME PRODUCTS CORPORATION
                                ACTING THROUGH ITS 
                         WYETH-AYERST LABORATORIES DIVISION
                                          
                                          
                                  OCTOBER 15, 1998
                                          


<PAGE>

                         COLLABORATION AND LICENSE AGREEMENT

     THIS COLLABORATION AND LICENSE AGREEMENT (the "Agreement") is entered into
as of the 15th day of October, 1998 (the "Effective Date"), by and between
GALAGEN INC., a company incorporated under the laws of the State of Delaware,
with its principal place of business at 4001 Lexington Avenue North, Arden
Hills, Minnesota  55126 USA ("GalaGen"), AND AMERICAN HOME PRODUCTS CORPORATION,
acting through its WYETH-AYERST LABORATORIES DIVISION, a company incorporated
under the laws of the State of Delaware, with its principal place of business at
555 East Lancaster Avenue, St. Davids, Pennsylvania  19087, USA
("Wyeth-Ayerst").  Both GalaGen and Wyeth-Ayerst are referred to herein
individually as a "Party" and collectively as the "Parties".

     WHEREAS,  GalaGen has developed proprietary technology with respect to
[**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION***]; and

     WHEREAS, GalaGen and Wyeth-Ayerst desire to collaborate with each other to
utilize GalaGen's proprietary technology to obtain [***CONFIDENTIAL TREATMENT
REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION***] and to develop Pediatric Formula Products and/or Other Products
containing such [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]; and

     WHEREAS,  Wyeth-Ayerst desires to obtain the worldwide rights to
manufacture and sell such Pediatric Formula Products and/or Other Products.

     NOW THEREFORE, in consideration of the foregoing premises and the mutual
promises, covenants and conditions contained in this Agreement, the Parties
agree as follows:

1.   DEFINITIONS.

     For the purposes of this Agreement, the capitalized terms hereunder shall
     have the meanings defined below:

     1.1  "AFFILIATE(S)" shall mean, in the case of either Party, any
          corporation, joint venture, or other business entity which directly or
          indirectly controls, is controlled by, or is under common control with
          that Party.  "Control", as used in this Section 1.1, shall mean having
          the power to direct, or cause the direction of, the management and
          policies of an entity, whether through ownership of voting securities,
          by contract or otherwise. [**CONFIDENTIAL TREATMENT REQUESTED; PORTION


                                          1
<PAGE>

          OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***].

     1.2  "BUDGET" shall have the meaning set forth in Section 2.6.1 hereof.
     
     1.3  "CALENDAR QUARTER" shall mean the respective periods of three (3)
          consecutive calendar months ending on March 31, June 30, September 30
          or December 31, for so long as this Agreement is in effect.

     1.4  "COLLABORATION" shall mean the research and development program
          conducted jointly by the Parties hereunder for the purpose of
          optimizing the production of [***CONFIDENTIAL TREATMENT REQUESTED;
          PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***] and developing and obtaining Regulatory Approval for
          Pediatric Formula Products.

     1.5  "COMMERCIALLY REASONABLE EFFORTS" shall mean efforts and resources
          normally used by a Party for a compound or product owned by it or to
          which it has rights, which is of similar market potential at a similar
          stage in its product life, taking into account the competitiveness of
          the marketplace, the proprietary position of the compound or product,
          the regulatory structure involved, the profitability of the applicable
          products, and other relevant factors.

     1.6  "CONTROL" OR "CONTROLLED" shall mean licensed with the right to grant
          sublicenses without violating the terms of any Third Party agreement.

     1.7  "DEVELOPMENT PLAN" shall have the meaning set forth in Section 2.1.

     1.8  "FIRST COMMERCIAL SALE"  shall mean, on a Product by Product basis,
          the first sale of such Product in any country of the Territory after
          such Product has been granted Regulatory Approval by the competent
          authorities in such country.

     1.9  "GALAGEN GROSS INCOME"  shall mean all income, calculated in
          accordance with generally accepted accounting procedures, GalaGen or
          its Affiliates receives from Third Parties in connection with an Other
          Product to which GalaGen obtains rights pursuant to Section 3.3
          hereof, including, without limitation, 

          [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***]


                                          2
<PAGE>

     1.10 "GALAGEN KNOW-HOW" shall mean Know-How owned or Controlled by GalaGen
          or its Affiliates at any time during the term of this Agreement.

     1.11 "GALAGEN PATENT RIGHTS" shall mean all Patent Rights owned or
          Controlled by GalaGen.  A list of the GalaGen Patent Rights existing
          as of the Effective Date is set out in Exhibit A hereto.

     1.12 "GALAGEN TRADEMARK" shall mean the trademark(s) used by GalaGen in
          connection with the [**CONFIDENTIAL TREATMENT REQUESTED; PORTION
          OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***], including, without limitation, Proventra-TM-.

     1.13 "GOOD CLINICAL PRACTICE" OR "GCP" shall mean the then current
          standards for clinical trials for pharmaceuticals, as set forth in the
          United States Federal Food, Drug and Cosmetics Act and applicable
          regulations promulgated thereunder, as amended from time to time, and
          such standards of good clinical practice as are required by the
          European Union and other organizations and governmental agencies in
          countries in which the Products are intended to be sold, to the extent
          such standards are not inconsistent with United States GCP.

     1.14 "GOOD LABORATORY PRACTICE" OR "GLP" shall mean the then current
          standards for laboratory activities for pharmaceuticals, as set forth
          in the United States Federal Food, Drug and Cosmetics Act and
          applicable regulations promulgated thereunder, as amended from time to
          time, and such standards of good laboratory practice as are required
          by the European Union and other organizations and governmental
          agencies in countries in which the Products are intended to be sold,
          to the extent such standards are not inconsistent with United States
          GLP.

     1.15 "GOOD MANUFACTURING PRACTICE" OR "GMP" shall mean the current
          standards for the manufacture of pharmaceuticals, as set forth in the
          United States Federal Food, Drug and Cosmetics Act and applicable
          regulations promulgated thereunder, as amended from time to time, and
          such standards of good manufacturing practice as are required by the
          European Union and other organizations and governmental agencies in
          countries in which the Products are intended to be sold, to the extent
          such standards are not inconsistent with United States GMP.

     1.16 "INTELLECTUAL PROPERTY RIGHTS" shall mean all Patent Rights,
          trademarks, copyrights, Know-How and/or trade secrets which are owned
          or Controlled by one Party hereto (with the right to license) or
          jointly by the Parties, with regard to the development, manufacture,
          importing, use, marketing and/or sale of any Product.


                                          3
<PAGE>

     1.17 "INVENTION" shall mean an invention conceived in the course of the
          performance of and within the scope of this Agreement.

     1.18 "JOINT DEVELOPMENT COMMITTEE" OR "JDC" shall mean the committee
          appointed by the Parties as set forth in Section 2.2.

     1.19 "KNOW-HOW" shall mean all know-how, processes, information and data
          including any copyright relating thereto owned or Controlled by either
          Party (with the right to have or disclose) as of the Effective Date or
          acquired during the term of this Agreement relating to:
     
               (a)  [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***];

               (b)  [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***];

               (c)  any Product containing (a) or (b);

               (d)  methods of making any of (a), (b) or (c);

               (e)  any component of (a), (b) or (c);

               (f)  any method of using any of (a), (b), (c) or (e); and/or

               (g)  any use of (a), (b), (c) or (e).


          The term "Know-How", however, shall not include any know-how,
          processes, information and data which is, as of the Effective Date or
          later becomes, generally available to the public.

     1.20 [***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***]

     1.21 "MANUFACTURING AND SUPPLY AGREEMENT" shall have the meaning set forth
          in Section 4.1 hereof.

     1.22 "NET SALES" shall mean proceeds from sales of Pediatric Formula
          Products by Wyeth-Ayerst, its Affiliates or sublicensees, as
          appropriate, to Third Parties, less the sum of (a) and (b) where (a)
          is a provision, determined under generally accepted accounting
          principles in the United States, for


                                          4
<PAGE>

          [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***].

          Sales of Pediatric Formula Products by and between a Party and its
          Affiliates are not sales to Third Parties and shall be excluded from
          Net Sales calculations for all purposes.

     1.23 "OTHER PRODUCT(S)"  shall mean any product, other than Pediatric
          Formula Products, which contains [**CONFIDENTIAL TREATMENT REQUESTED;
          PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***].  For the sake of clarity, Other Products shall include
          [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***].

     1.24 "PATENT RIGHTS" shall mean all patents or patent applications,  and
          all divisional, continuations, continuations-in-part, reissues,
          extensions, supplementary protection certificates and foreign
          counterparts thereof, existing as of the Effective Date or filed or
          issuing during the term of this Agreement, at least one claim of which
          covers:

               (a)  [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***];

               (b)  [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***];

               (c)  any Product containing (a) or (b);

               (d)  methods of making any of (a), (b) or (c);

               (e)  any component of  (a), (b) or (c);

               (f)  any method of using any of (a), (b), (c) or (e); and/or

               (g)  any use of (a), (b), (c) or (e).

     1.25 "PEDIATRIC FORMULA PRODUCT(S)" shall mean any  beverage (whether
          supplied in liquid form or as a powder to be mixed with a liquid)
          containing [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
          SEPARATELY WITH THE SECURITIES


                                          5
<PAGE>


          AND EXCHANGE COMMISSION***] for oral consumption by infants and/or
          children.

     1.26 "PREFERENTIAL OTHER PRODUCT" shall have the meaning set forth in
          Section 3.3.1 hereof.

     1.27 "PRODUCT" shall mean any Pediatric Formula Product or any Other
          Product.

     1.28 "R&D EXPENSES" shall mean the sum of (i) the reasonable out-of-pocket
          costs incurred by GalaGen in performing its obligations under the
          Collaboration and [***CONFIDENTIAL TREATMENT REQUESTED; PORTION
          OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***] per man-hour expended by GalaGen's employees who are
          performing activities pursuant to the Development Plan.

     1.29 "REGULATORY APPROVAL" shall mean all authorizations by the competent
          authorities which are required for the regular marketing, promotion,
          pricing and sale of a Product in a given country or regulatory
          jurisdiction.

     1.30 "REGULATORY AUTHORITY" shall mean any national, supra-national (e.g.,
          the European Commission, the Council of the European Union, or the
          European Agency for the Evaluation of Medicinal Products), regional,
          state or local regulatory agency, department, bureau, commission,
          council or other governmental entity involved in the granting of
          Regulatory Approval for a Product.

     1.31 [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***]

     1.32 "TERRITORY" shall mean the world.

     1.33 "THIRD PARTY(IES)" shall mean any person(s) or entity(ies) other than
          GalaGen, Wyeth-Ayerst or their Affiliates.

     1.34 "TRANSACTION AGREEMENTS" shall mean this Agreement, the Manufacturing
          and Supply Agreement and the Warrant Purchase Agreement.

     1.35 "USA" shall mean the United States of America, its territories and
          possessions and the Commonwealth of Puerto Rico.


                                          6
<PAGE>

     1.36 "VALID CLAIM" shall mean an unexpired claim of an issued patent
          forming part of the GalaGen Patent Rights, which claim has not been
          declared invalid by a court or other tribunal of competent
          jurisdiction.

     1.37 "WARRANT" OR "WARRANT PURCHASE AGREEMENT" shall have the meaning set
          forth in Section 5.3 hereof.

     1.38 "WYETH-AYERST KNOW-HOW" shall mean Know-How owned or Controlled by
          Wyeth-Ayerst.

     1.39 "WYETH-AYERST PATENT RIGHTS" shall mean all Patent Rights owned or
          Controlled by Wyeth-Ayerst.  A list of the Wyeth-Ayerst Patent Rights
          existing as of the Effective Date is set out in Exhibit B hereto.

     1.40 "WYETH-AYERST TRADEMARK" shall mean the trademark(s) (other than the
          GalaGen Trademark)  used by Wyeth in connection with the marketing of
          any Product.


2.   COLLABORATION.

     2.1  GENERAL OBLIGATIONS.  The Parties have designed and agreed upon a
          joint development plan (the "Development Plan") pursuant to which they
          will conduct the Collaboration hereunder.  A copy of the Development
          Plan is attached hereto as Exhibit C.  The Development Plan may be
          updated or revised, in writing, from time to time by the JDC.  During
          the term of the Collaboration, each Party agrees to use its respective
          Commercially Reasonable Efforts to perform its obligations under the
          Development Plan and this Agreement in a timely manner.

     2.2  JOINT DEVELOPMENT COMMITTEE. The Parties agree that the Collaboration,
          including the development of the [**CONFIDENTIAL TREATMENT REQUESTED;
          PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***] and the Pediatric Formula Products, will be managed by
          a Joint Development Committee (the "JDC").

          2.2.1     COMPOSITION.  No later than thirty (30) days after the
                    Effective Date, each of the Parties will appoint two (2)
                    representatives to the JDC.  The chairperson of the JDC will
                    be one of the Wyeth-Ayerst representatives.  A Party may
                    change any of its representatives at any time by giving
                    written notice to the other Party.

          2.2.2     RESPONSIBILITIES.  The JDC will:


                                          7
<PAGE>

                    (a)  monitor the progress of and compliance with the
                         Development Plan and approve any change in the
                         Development Plan;

                    (b)  select [**CONFIDENTIAL TREATMENT REQUESTED; PORTION
                         OMITTED FILED SEPARATELY WITH THE SECURITIES AND
                         EXCHANGE COMMISSION***] studies and [**CONFIDENTIAL
                         TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
                         WITH THE SECURITIES AND EXCHANGE COMMISSION***] for
                         evaluation in animal models and/or human volunteers;

                    (c)  develop research protocols and define the primary
                         endpoint for the clinical trials; 

                    (d)  review and evaluate the results of studies performed in
                         connection with the Collaboration; and

                    (e)  determine the most appropriate regulatory pathway and
                         develop appropriate strategy to obtain Regulatory
                         Approval for the [**CONFIDENTIAL TREATMENT REQUESTED;
                         PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES
                         AND EXCHANGE COMMISSION***] and the Pediatric Formula
                         Product.

          2.2.3     MEETINGS OF THE JDC.  The chairperson of the JDC shall call
                    meetings when deemed appropriate, currently anticipated to
                    be no less frequently than once every three (3) months.  If
                    possible, the meetings shall be held in person, or where
                    appropriate, by video or telephone conference.  When held in
                    person, the location of such meetings shall alternate
                    between Wyeth-Ayerst's facilities and GalaGen's facilities. 
                    The chairperson shall determine the form of and agenda for
                    the meeting.  Additional participants may be invited by any
                    member to attend meetings where appropriate (e.g.,
                    representatives of regulatory affairs or outside
                    consultants).  Such additional participants shall have no
                    vote.  Minutes of each meeting of the JDC shall be exchanged
                    for review and comment by the members.  Thereafter, they
                    shall be signed by the chairperson and distributed to each
                    of the Parties.  Each Party shall be responsible for the
                    expenses incurred by its representatives in attending such
                    meetings.


                                          8
<PAGE>

          2.2.4     VOTING.  The JDC shall make decisions by majority vote, with
                    at least one consenting vote of each Party's JDC members. 
                    If the required majority decision cannot be found and all
                    the members of each Party take the same opposing positions
                    in a matter which either Party deems to be of major
                    importance, the matter shall be handled pursuant to Section
                    2.2.6.  Voting by proxy is permissible.  Urgent matters
                    (including regulatory and adverse event matters) may be
                    decided by unanimous vote of the chairperson and a
                    representative designated by GalaGen.

          2.2.5     ROLE OF CHAIRPERSON.  Except as explicitly set forth herein,
                    in no event shall the chairperson of the JDC have any
                    additional powers or responsibilities beyond those delegated
                    to such person by virtue of such person's membership on the
                    JDC.  Without limiting the foregoing, it is understood that,
                    except as a voting member of the JDC, the chairperson shall
                    not have the power to control or dictate decisions or to
                    veto any decisions reached by the committee under the
                    decision-making processes set forth in Section 2.2.4.

          2.2.6     DISPUTE RESOLUTION.  If the JDC is unable to resolve, after
                    thirty (30) days, a dispute regarding any issue presented to
                    it or arising in it, such dispute will be referred to
                    [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]. 
                    If such dispute is not resolved by the end of
                    [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]
                    period, the Parties shall be free to pursue any legal or
                    equitable remedy available to them.

     2.3  SUPPLY OF [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
          SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***].  GalaGen
          shall provide Wyeth-Ayerst with [**CONFIDENTIAL TREATMENT REQUESTED;
          PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***], from time to time and in amounts specified by
          Wyeth-Ayerst, for use by Wyeth-Ayerst, its Affiliates and sublicensees
          in the development of Products, including, without limitation, the
          manufacture of Products for use in conducting clinical trials to
          obtain Regulatory Approval for Products. [**CONFIDENTIAL TREATMENT
          REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
          EXCHANGE COMMISSION***]

     2.4  RECORDS, REPORTS, AND INFORMATION EXCHANGE.  


                                          9
<PAGE>

          2.4.1     TECHNOLOGY AND INFORMATION TRANSFER.  GalaGen will provide
                    to Wyeth-Ayerst all GalaGen Know-How as Wyeth-Ayerst deems
                    necessary to carry out its responsibilities in the
                    Collaboration and to manufacture and obtain Regulatory
                    Approval for Products.  Wyeth-Ayerst will provide to GalaGen
                    all Wyeth-Ayerst Know-How as Wyeth-Ayerst deems necessary
                    for GalaGen to carry out its responsibilities in the
                    Collaboration.  All information transferred, provided or
                    exchanged under this Section 2.4.1 will be subject to the
                    confidentiality requirements set forth in Article 12 hereof.

          2.4.2     RECORD KEEPING.  Each Party will maintain records in
                    sufficient detail and in good scientific manner appropriate
                    for Regulatory Approval and patent purposes.

          2.4.3     COMMUNICATION REGARDING THE DEVELOPMENT PROGRESS.  Within
                    [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***],
                    each Party shall provide the JDC with a written report
                    summarizing the status of the activities it conducted in
                    furtherance of the Collaboration during such [**CONFIDENTIAL
                    TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH
                    THE SECURITIES AND EXCHANGE COMMISSION***].

          2.4.4     R&D EXPENSES.  Within [**CONFIDENTIAL TREATMENT REQUESTED;
                    PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
                    EXCHANGE COMMISSION***], GalaGen shall submit to
                    Wyeth-Ayerst a written report setting forth a detailed
                    accounting of the R&D Expenses incurred by GalaGen during
                    such Calendar Quarter and indicating the R&D Expenses which
                    are to be reimbursed by Wyeth-Ayerst pursuant to Section 2.6
                    hereof. [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED
                    FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                    COMMISSION***]. 

          2.4.5     OTHER PRODUCTS.  Periodically throughout the term of this
                    Agreement, Wyeth-Ayerst shall provide the JDC with a list of
                    Other Products for which Wyeth-Ayerst has either initiated
                    development activities or plans to initiate development
                    activities.

     2.5  COMPLIANCE.  Each of the Parties shall comply with all applicable GLP,
          GCP and GMP in the conduct of the Collaboration.


                                          10
<PAGE>

     2.6  FUNDING OF THE COLLABORATION.  

          [***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***]

     2.7  [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***]

     2.8  REGULATORY APPROVALS.  Wyeth-Ayerst shall file all regulatory dossiers
          for the [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
          SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***] and the
          Product(s) under its or its Affiliates' names.  Wyeth-Ayerst shall own
          all Regulatory Approvals for the [**CONFIDENTIAL TREATMENT REQUESTED;
          PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***] and Product(s), except for those Products to which
          GalaGen obtains rights in accordance with Section 3.3 hereof. 
          Wyeth-Ayerst shall be responsible for all communications with
          regulatory agencies with respect to the Product(s)  (other than
          Products to which GalaGen obtains rights in accordance with Section
          3.3 hereof), subject to its obligation to keep the JDC informed.   In
          the event that GalaGen obtains rights to an Other Product in
          accordance with the provisions of Section 3.3 hereof, Wyeth-Ayerst
          shall permit GalaGen to have access to such applications for
          Regulatory Approval and related documents solely as such applications
          and documents relate to the use of [**CONFIDENTIAL TREATMENT
          REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
          EXCHANGE COMMISSION***], PROVIDED, HOWEVER, that GalaGen's use of such
          applications and documents shall be limited to obtaining and
          maintaining Regulatory Approval for such Other Product.

     2.9  EXCLUSIVITY. GalaGen covenants that, except as otherwise permitted in
          accordance with the provisions of Section 3.3 hereof,  during the term
          of this Agreement, it will not conduct any research and development
          activities, either independently or with Third Parties, with respect
          to Products and that it will not provide [**CONFIDENTIAL TREATMENT
          REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
          EXCHANGE COMMISSION***] to any Third Party for the purpose of
          conducting research and development activities or commercializing any
          Product.  Notwithstanding, the foregoing, GalaGen and Wyeth-Ayerst
          each recognize that, from time to time, it may be desirable or
          necessary to retain consultants to assist the Parties in the


                                          11
<PAGE>

          Collaboration.  In such event, the Parties together shall enter into a
          consulting agreement with each such consultant, which consulting
          agreement shall, in both form and substance, be reasonably acceptable
          to each of the Parties.

     2.10 TERM OF COLLABORATION.  The term of the Collaboration shall commence
          on the Effective Date and, unless terminated earlier, shall expire
          [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***] or such later date as
          may be agreed upon by majority vote of the JDC.  The Collaboration
          shall automatically terminate upon termination of this Agreement
          pursuant to either of Sections 9.2 or 9.3 hereof.

3.   GRANT OF RIGHTS.

     3.1  EXCLUSIVE LICENSE.  

          3.1.1     PEDIATRIC FORMULA PRODUCTS.  Subject to the other provisions
                    of this Agreement, GalaGen hereby grants to Wyeth-Ayerst an
                    exclusive license (exclusive even as to GalaGen) in the
                    Territory, under GalaGen's Intellectual Property Rights and
                    GalaGen's interest in any Intellectual Property Rights
                    jointly owned by the Parties, to develop, manufacture, have
                    manufactured, import, export, use, market, offer for sale
                    and sell Pediatric Formula Products and to use the GalaGen
                    Trademarks on the packaging of and in promotional materials
                    for Pediatric Formula Products, PROVIDED, HOWEVER, that,
                    except as provided in Article 4 of the Manufacturing and
                    Supply Agreement, nothing herein shall confer upon
                    Wyeth-Ayerst any rights to manufacture [**CONFIDENTIAL
                    TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH
                    THE SECURITIES AND EXCHANGE COMMISSION***] for use in
                    Pediatric Formula Products.

          3.1.2     OTHER PRODUCTS.  Subject to the other provisions of this
                    Agreement, GalaGen hereby grants to Wyeth-Ayerst an
                    exclusive license (exclusive even as to GalaGen except as
                    provided in Section 3.3 hereof) in the Territory, under
                    GalaGen's Intellectual Property Rights and GalaGen's
                    interest in any Intellectual Property Rights jointly owned
                    by the Parties, to develop, manufacture, have manufactured,
                    import, export, use, market, offer for sale and sell Other
                    Products and to use the GalaGen Trademarks on the packaging
                    of and in promotional materials for Other Products,


                                          12
<PAGE>

                    PROVIDED, HOWEVER, that, except as provided in Article 4 of
                    the Manufacturing and Supply Agreement, nothing herein shall
                    confer upon Wyeth-Ayerst any rights to manufacture
                    [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]
                    for use in Other Products.


     3.2  SUBLICENSING.  Wyeth-Ayerst shall have the right to  sublicense all or
          any part of the rights granted to it under Section 3.1 to its
          Affiliates or Third Parties.  Wyeth-Ayerst shall notify GalaGen of its
          intent to grant a sublicense to a Third Party prior to granting such
          sublicense under this Section 3.2, but Wyeth-Ayerst shall not be
          required to obtain GalaGen's consent to grant any such sublicense
          except in the case where Wyeth-Ayerst is sublicensing, to a Third
          Party, the right to develop and commercialize an Other Product
          included in the list of Preferential Other Products established by the
          JDC in accordance with Section 3.3.1 hereof, in which event,
          Wyeth-Ayerst may grant such sublicense to such Third Party only after
          obtaining GalaGen's prior written consent, which consent shall not be
          unreasonably withheld.  In the event that GalaGen's consent is
          required, in accordance with the preceding sentence, for Wyeth-Ayerst
          to grant a sublicense to a Third Party to develop and commercialize a
          Preferential Other Product and GalaGen elects to withhold such
          consent, GalaGen shall notify Wyeth-Ayerst, in writing and within
          [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***] after Wyeth-Ayerst's
          request for such consent, that GalaGen is withholding such consent,
          which notice shall state the reason(s) such consent is being withheld
          and provide documentary or other evidence GalaGen has in support of
          its position that such reason(s) reasonably warrant the withholding of
          such consent.  If Wyeth-Ayerst does not receive such written notice
          within such [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
          SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***] period,
          GalaGen shall be deemed to have provided its consent for Wyeth-Ayerst
          to grant such sublicense. 

     3.3  GALAGEN RIGHTS TO OTHER PRODUCTS.  

          3.3.1     IDENTIFICATION OF PREFERENTIAL OTHER PRODUCTS.  GalaGen,
                    [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***], 
                    shall notify the JDC and Wyeth-Ayerst, each in writing, of
                    those Other Products that GalaGen reasonably believes it
                    would both desire and have the ability to develop and
                    commercialize, either itself or in 


                                          13
<PAGE>

                    collaboration with a Third Party, PROVIDED, HOWEVER, that
                    such list of Other Products shall not include
                    [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]. 
                    Each such notice shall include a proposed development plan
                    for each Other Product included on such list.  Within
                    [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]
                    after receiving the first such list the JDC shall meet to
                    consider the list and proposed development plan(s) provided
                    by GalaGen and any concerns that Wyeth-Ayerst has with the
                    inclusion of any particular Other Product(s) on such list,
                    and based on such considerations, the JDC shall establish a
                    list of Other Products for which Wyeth-Ayerst must seek
                    GalaGen's consent, in accordance with Section 3.2 hereof,
                    prior to granting to one or more Third Parties a
                    sublicense(s) to develop and commercialize such Other
                    Products (the "Preferential Other Products").  Once each
                    year the JDC shall meet [**CONFIDENTIAL TREATMENT REQUESTED;
                    PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
                    EXCHANGE COMMISSION***] (i) to review the then current list
                    of Preferential Other Products and GalaGen's progress in
                    developing such Other Product in accordance with the
                    development plan accepted by the JDC for such Other Product,
                    and (ii) to consider the list of any Other Products provided
                    by GalaGen and any concerns that Wyeth-Ayerst has with the
                    inclusion of any particular Other Product(s) on the list of
                    Preferential Other Products.  Based on such review and
                    considerations, the JDC shall revise the then current list
                    of Preferential Other Products, PROVIDED, HOWEVER, that if
                    GalaGen has failed to use reasonable efforts to develop any
                    Other Product in accordance with the development plan
                    accepted by the JDC for such Other Product, such Other
                    Product shall be removed from the list of Preferential Other
                    Products unless the JDC agrees to accept from GalaGen a
                    revised development plan for such Other Product.

          3.3.2     ACQUISITION OF SUBLICENSE BY GALAGEN.  In the event GalaGen
                    desires to develop and commercialize an Other Product
                    (whether or not such Other Product is a Preferential Other
                    Product), either itself or in collaboration with a Third
                    Party, GalaGen may, by written notice to Wyeth-Ayerst,
                    request that Wyeth-Ayerst grant to GalaGen a sublicense of
                    the rights granted to Wyeth-Ayerst under Section 3.1.2
                    hereof solely for the development and commercialization of
                    such Other Product.  After the receipt of such 


                                          14
<PAGE>

                    notice, Wyeth-Ayerst may elect whether or not to grant such
                    sublicense and will not unreasonably refuse to grant such a
                    sublicense to GalaGen, PROVIDED, HOWEVER, that in no event
                    will Wyeth-Ayerst be required to grant a sublicense to
                    GalaGen for the development and/or commercialization of such
                    an Other Product if 

                         (i)  Wyeth-Ayerst has initiated the development and/or
                              commercialization of the same or a similar Other
                              Product; 

                        (ii)  Wyeth-Ayerst has advised the JDC pursuant to
                              Section 2.4.5 hereof, that it intends to initiate
                              the development of the same or a similar Other
                              Product;

                       (iii)  Wyeth-Ayerst has, in accordance with Section 3.2
                              hereof, granted to a Third Party the right to
                              develop and/or commercialize the same or a similar
                              Other Product; 

                        (iv)  Wyeth-Ayerst reasonably believes that the
                              development and/or commercialization of such an
                              Other Product would adversely affect the
                              commercial potential of any Pediatric Formula
                              Product that Wyeth-Ayerst has developed, is
                              developing, plans to develop, is commercializing
                              or plans to commercialize; 

                         (v)  Wyeth-Ayerst is able to reasonably demonstrate
                              that the development and/or commercialization of
                              such an Other Product would have a material
                              adverse effect on the commercial potential of any
                              Other Product that Wyeth-Ayerst has developed, is
                              developing or is commercializing; 

                        (vi)  Wyeth-Ayerst is able to reasonably demonstrate
                              that the development and/or commercialization of
                              such an Other Product would have a material
                              adverse effect on the commercial potential of any
                              Other Product which Wyeth-Ayerst has advised the
                              JDC, pursuant to Section 2.4.5 hereof, that it
                              intends to initiate the development of; 

                       (vii)  Wyeth-Ayerst is able to reasonably demonstrate
                              that the development and/or commercialization of
                              such an Other Product would have a material
                              adverse 


                                          15
<PAGE>

                              effect on the commercial potential of any product
                              that is being developed or commercialized by
                              Wyeth-Ayerst in one of Wyeth-Ayerst's core
                              business areas; or 

                      (viii)  [**CONFIDENTIAL TREATMENT REQUESTED; PORTION
                              OMITTED FILED SEPARATELY WITH THE SECURITIES AND
                              EXCHANGE COMMISSION***].  Wyeth-Ayerst will notify
                              GalaGen of such election within [**CONFIDENTIAL
                              TREATMENT REQUESTED; PORTION OMITTED FILED
                              SEPARATELY WITH THE SECURITIES AND EXCHANGE
                              COMMISSION***] of receiving such notice from
                              GalaGen.  In the event that Wyeth-Ayerst elects to
                              grant such a sublicense to GalaGen the Parties
                              shall use their respective Commercially Reasonable
                              Efforts to negotiate, in good faith, a definitive
                              sublicense agreement containing terms and
                              conditions (including, without limitation, whether
                              such sublicense will be exclusive even as to
                              Wyeth-Ayerst or exclusive except as to
                              Wyeth-Ayerst) mutually acceptable to the Parties,
                              PROVIDED, HOWEVER, that such sublicense, INTER
                              ALIA, shall provide that (i) GalaGen shall pay to
                              Wyeth-Ayerst [**CONFIDENTIAL TREATMENT REQUESTED;
                              PORTION OMITTED FILED SEPARATELY WITH THE
                              SECURITIES AND EXCHANGE COMMISSION***] and (ii)
                              Wyeth-Ayerst will be granted a right of first
                              refusal to obtain the right to commercialize such
                              Other Product(s) in the event GalaGen elects to
                              license or otherwise transfer such responsibility
                              to a Third Party, PROVIDED, HOWEVER, that
                              Wyeth-Ayerst shall be required to waive its right
                              to exercise such right of first refusal if (x)
                              GalaGen, in its written notice requesting such
                              sublicense, identifies a Third Party to whom
                              GalaGen intends to further sublicense the right to
                              commercialize such Other Product and (y) GalaGen,
                              in fact, grants such a further sublicense to such
                              Third Party within [**CONFIDENTIAL TREATMENT
                              REQUESTED; PORTION OMITTED FILED SEPARATELY WITH
                              THE SECURITIES AND EXCHANGE COMMISSION***] after
                              Wyeth-Ayerst grants to 


                                          16
<PAGE>

                              GalaGen a sublicense to develop and/or
                              commercialize such Other Product. The mechanism
                              and timing for exercising such right of first
                              refusal shall be mutually agreed upon by the
                              Parties and shall be set forth in the definitive
                              sublicense agreement, provided, however, that such
                              sublicense agreement shall provide that
                              Wyeth-Ayerst's acquisition of rights under such
                              right of first refusal shall be substantially
                              equivalent to the terms and conditions that
                              GalaGen had negotiated, in good faith, with a
                              Third Party.  For purposes of this Section 3.3, a
                              material adverse effect on a product shall
                              include, without limitation, a forecasted decline
                              of [**CONFIDENTIAL TREATMENT REQUESTED; PORTION
                              OMITTED FILED SEPARATELY WITH THE SECURITIES AND
                              EXCHANGE COMMISSION***] in unit sales or revenues
                              from the sale of such product.

          3.3.3     FAILURE TO CONCLUDE NEGOTIATION OF SUBLICENSE.   If
                    Wyeth-Ayerst has used its Commercially Reasonable Efforts to
                    negotiate a sublicense agreement with GalaGen pursuant to
                    Section 3.3.2 hereof and the Parties fail to sign such a
                    definitive sublicense agreement within [**CONFIDENTIAL
                    TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH
                    THE SECURITIES AND EXCHANGE COMMISSION***] after
                    Wyeth-Ayerst has notified GalaGen of its election to
                    negotiate such an agreement for the grant to GalaGen of a
                    sublicense to develop and/or commercialize such Other
                    Product (or such longer period of time as may be mutually
                    agreed upon by the Parties in writing), Wyeth-Ayerst may, by
                    written notice to GalaGen, revoke its election to negotiate
                    and/or grant such a sublicense to GalaGen.

          3.3.4     REFUSAL TO GRANT SUBLICENSE.  In the event that Wyeth-Ayerst
                    elects, for the reasons set forth in Section 3.3.2(ii)
                    and/or Section 3.3.2(vi) above, not to grant to GalaGen a
                    sublicense to develop and/or commercialize an Other Product
                    and within [**CONFIDENTIAL TREATMENT REQUESTED; PORTION
                    OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                    COMMISSION***] making such election Wyeth-Ayerst fails to
                    either initiate the development of such Other Product or
                    sublicense to a Third Party the right to develop and/or
                    commercialize such Other Product, GalaGen, within
                    [**CONFIDENTIAL TREATMENT REQUESTED; PORTION 


                                          17
<PAGE>

                    OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                    COMMISSION***] after the expiration of such [**CONFIDENTIAL
                    TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH
                    THE SECURITIES AND EXCHANGE COMMISSION***] period, may, by
                    written notice to Wyeth-Ayerst, request that such sublicense
                    be granted and, in such event, Wyeth-Ayerst shall thereafter
                    grant to GalaGen a sublicense to develop and commercialize
                    such Other Product subject to the negotiation of a
                    definitive sublicense agreement with GalaGen as provided in
                    Section 3.3.2 hereof.

     3.4  [***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***]

4.   MANUFACTURE, SUPPLY AND COMMERCIALIZATION OF PRODUCTS.

     4.1  MANUFACTURE AND SUPPLY OF [**CONFIDENTIAL TREATMENT REQUESTED; PORTION
          OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***].  GalaGen shall manufacture or have manufactured and
          supply to Wyeth-Ayerst and Wyeth-Ayerst shall purchase from GalaGen
          its requirements of the [**CONFIDENTIAL TREATMENT REQUESTED; PORTION
          OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***], for use in manufacturing Products to be sold to Third
          Parties, in accordance with the terms and provisions of the
          Manufacturing and Supply Agreement signed by the Parties on even date
          with the Effective Date, which agreement shall be substantially in the
          form which is attached hereto as Exhibit F.   

     4.2  MANUFACTURE OF PRODUCTS.  Wyeth-Ayerst, either directly or through a
          Third Party manufacturer of its choosing, shall be responsible for
          manufacturing its requirements of the Products using the
          [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***] supplied by GalaGen
          pursuant to Section 4.1 hereof.  

     4.3  REGISTRATION AND COMMERCIALIZATION OF PRODUCTS.  Wyeth-Ayerst shall
          use its Commercially Reasonable Efforts to obtain Regulatory Approval
          for, and to promote, market and sell a Pediatric Formula Product in
          those countries of the Territory where Wyeth-Ayerst, in its sole
          discretion, deems it commercially reasonable to do so.  If within


                                          18
<PAGE>

          [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***], an application for
          Regulatory Approval has not been filed seeking Regulatory Approval for
          the sale of a Pediatric Formula Product in the United States, the
          Parties, upon GalaGen's written request, shall meet to discuss
          Wyeth-Ayerst's plans for obtaining Regulatory Approval for and
          commercializing (either directly or through one or more Affiliates,
          sublicensees or distributors) Pediatric Formula Products in the United
          States, PROVIDED, HOWEVER, that if there has been a delay in either
          (a) the completion of the research and development activities to be
          performed under the Development Plan or (b) the supply by GalaGen to
          Wyeth-Ayerst of Wyeth-Ayerst's requirements of the [**CONFIDENTIAL
          TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
          SECURITIES AND EXCHANGE COMMISSION***] for use in the development of
          Pediatric Formula Products, such [**CONFIDENTIAL TREATMENT REQUESTED;
          PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***].  In addition, if, after having had the discussions
          described in the preceding sentence, Wyeth-Ayerst, [**CONFIDENTIAL
          TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
          SECURITIES AND EXCHANGE COMMISSION***], fails to either 

               (i)  file an application seeking Regulatory Approval for at least
                    one (1) Pediatric Formula Product in the United States, or 

              (ii)  grant a sublicense to one or more Third Parties to develop
                    and/or commercialize at least one (1) Pediatric Formula
                    Product in the United States, 

          Wyeth-Ayerst shall, upon GalaGen's written request, grant to GalaGen
          an exclusive (exclusive, except as to Wyeth-Ayerst) sublicense of the
          rights granted to Wyeth-Ayerst hereunder, to develop, make, have made,
          use, import, market, promote, offer for sale, and sell Pediatric
          Formula Products (and not any Other Products) in the United States,
          PROVIDED, HOWEVER, that if  there has been a delay [**CONFIDENTIAL
          TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
          SECURITIES AND EXCHANGE COMMISSION***] in either (x) the completion of
          the research and development activities to be performed under the
          Development Plan or (y) the supply by GalaGen to Wyeth-Ayerst of
          Wyeth-Ayerst's requirements of [**CONFIDENTIAL TREATMENT REQUESTED;
          PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***] for use in the development of Pediatric Formula
          Products such [**CONFIDENTIAL TREATMENT 


                                          19
<PAGE>

          REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
          EXCHANGE COMMISSION***].  Further, if Wyeth-Ayerst has not made its
          First Commercial Sale of a Pediatric Formula Product in the United
          States within [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED
          FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***] after
          obtaining Regulatory Approval for the first Pediatric Formula Product
          in the United States, Wyeth-Ayerst shall, upon GalaGen's written
          request, grant to GalaGen an exclusive (exclusive, even as to
          Wyeth-Ayerst) sublicense of the rights granted by GalaGen to
          Wyeth-Ayerst hereunder, to use GalaGen's Intellectual Property Rights
          and GalaGen's interest in any Intellectual Property Rights jointly
          owned by the Parties to develop, make, have made, use, import, market,
          promote, offer for sale, and sell Pediatric Formula Products (and not
          any Other Products) in the United States only.   In the event that
          Wyeth-Ayerst is required, in accordance with this Section 4.3, to
          grant a sublicense to GalaGen the Parties shall within the
          [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***] after GalaGen's
          written request, use their respective Commercially Reasonable Efforts
          to negotiate, in good faith, a definitive sublicense agreement
          containing terms and conditions mutually acceptable to the Parties,
          provided, however, that in no event will Wyeth-Ayerst be required to
          grant to GalaGen a license under any of Wyeth-Ayerst's Intellectual
          Property Rights..


5.   CONSIDERATION TO GALAGEN.

     5.1  LICENSE FEE.  [***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED
          FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]

     5.2  ADDITIONAL LICENSE FEES.  [***CONFIDENTIAL TREATMENT REQUESTED;
          PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***]

     5.3  PURCHASE OF WARRANTS.  Simultaneously with the execution of this
          Agreement, GalaGen will issue to Wyeth-Ayerst a stock purchase
          warrant(the "Warrant" or the "Warrant Purchase Agreement") permitting
          Wyeth-Ayerst to purchase up to two hundred thousand (200,000) shares
          of GalaGen's common stock at the price set forth therein.  The Warrant
          shall be in the form that is attached hereto as Exhibit G.


                                          20
<PAGE>

     5.4  METHOD OF PAYMENT. [**CONFIDENTIAL TREATMENT REQUESTED; PORTION
          OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***].


6.  ACCOUNTS AND RECORDS; WITHHOLDING TAX.

     6.1  RECORD KEEPING BY GALAGEN.  GalaGen shall keep accurate books and
          accounts of record in connection with the activities conducted by it
          as part of the Collaboration in sufficient detail to permit accurate
          determination of all figures necessary for verification of the R&D
          Expenses incurred by GalaGen in the Collaboration hereunder.  GalaGen
          shall maintain such records for a period of [**CONFIDENTIAL TREATMENT
          REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
          EXCHANGE COMMISSION***] after the end of the year in which they were
          generated.

     6.2  AUDIT BY WYETH-AYERST.  Wyeth-Ayerst, through an independent certified
          public accountant reasonably acceptable to GalaGen, shall have the
          right, at its own expense, to access the books and records of GalaGen
          for the sole purpose of verifying the statements furnished by GalaGen
          pursuant to Section 2.4.4.  Such access shall be conducted after
          reasonable prior written notice to GalaGen and during ordinary
          business hours and shall not be more frequent than once per calendar
          year.  Wyeth-Ayerst agrees to keep in strict confidence all
          information learned in the course of such audit, except when it is
          necessary to reveal such information in order to enforce its rights
          under this Agreement.  Wyeth-Ayerst's right to have such records
          examined shall survive termination or expiration of this Agreement. 
          In the event such audit reveals an overpayment GalaGen shall promptly
          refund to Wyeth-Ayerst the amount of such overpayment.  In the event
          such audit reveals an overpayment of [**CONFIDENTIAL TREATMENT
          REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
          EXCHANGE COMMISSION***] of the amount actually due, GalaGen shall also
          promptly reimburse Wyeth-Ayerst for the reasonable out-of-pocket
          expenses incurred by Wyeth-Ayerst in conducting such audit.

     6.3  RECORD KEEPING BY WYETH-AYERST.  Wyeth-Ayerst shall keep accurate
          books and accounts of record in connection with the sale by or for it
          of the Products in sufficient detail to permit accurate determination
          of all figures necessary for verification of payments required to be
          paid hereunder.  Wyeth-Ayerst shall maintain such records for a period
          of [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
          SEPARATELY WITH THE SECURITIES AND 


                                          21
<PAGE>

          EXCHANGE COMMISSION***] after the end of the year in which they were
          generated.

     6.4  AUDIT BY GALAGEN.  GalaGen, through an independent certified public
          accountant reasonably acceptable to Wyeth-Ayerst, shall have the
          right, at its own expense, to access the books and records of
          Wyeth-Ayerst for the sole purpose of determining whether a payment
          under either Section 5.1 or Section 5.2 has become due.  Such access
          shall be conducted after reasonable prior written notice to GalaGen
          and during ordinary business hours and shall not be more frequent than
          once per calendar year.  Wyeth-Ayerst may require such independent
          certified public accountant to sign a customary confidential
          disclosure agreement prior to permitting such independent certified
          public accountant to have access to its books, records or facilities. 
          The Parties agree that such independent certified public accountant
          shall disclose to GalaGen only whether the payments due under Section
          5.1 or Section 5.2 hereof were made on time in accordance with the
          provisions of Article 5 hereof and the specific details concerning any
          late payments.  GalaGen agrees to keep in strict confidence all
          information learned in the course of such audit, except when it is
          necessary to reveal such information in order to enforce its rights
          under this Agreement.  GalaGen's right to have such records examined
          shall survive termination or expiration of this Agreement.  In the
          event that such an audit reveals that a payment by Wyeth-Ayerst to
          GalaGen under Section 5.1 or Section 5.2 hereof was paid to GalaGen
          more than [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
          SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***] to GalaGen
          in accordance with Article 5 hereof, Wyeth-Ayerst shall reimburse
          GalaGen for the reasonable out-of-pocket expenses incurred by GalaGen
          in conducting such audit.

     6.5  WITHHOLDING.  All taxes, assessments and fees of any nature levied or
          incurred on account of any payments accruing under this Agreement, by
          national, state or local governments, will be assumed and paid by
          Wyeth-Ayerst, except taxes levied thereon as income to GalaGen and if
          such taxes are required to be withheld by Wyeth-Ayerst they will be
          deducted from payments due to GalaGen and will be timely paid by
          Wyeth-Ayerst to the proper taxing authority for the account of
          GalaGen.  A receipt or other proof of payment therefor shall be
          secured and sent to GalaGen as soon as practicable.

     6.6  FOREIGN EXCHANGE.  For the purpose of computing Net Sales for Products
          sold in a currency other than United States Dollars, such currency
          shall be converted into United States Dollars in accordance with
          Wyeth-Ayerst's customary and usual translation procedures,
          consistently applied.


                                          22
<PAGE>

7.   TRADEMARKS.

     7.1  TRADEMARKS FOR PRODUCTS.  Wyeth-Ayerst shall select and own the
          Wyeth-Ayerst Trademarks for marketing Products in the Territory.  All
          expenses for (i) registration of such Trademarks and (ii) bringing,
          maintaining and prosecuting any action to protect or defend such
          Trademarks shall be borne by Wyeth-Ayerst and Wyeth-Ayerst shall
          retain all recoveries therefrom.  At the termination of this
          Agreement, Wyeth-Ayerst shall continue to have unrestricted ownership
          of such Trademark(s) in the Territory.

     7.2  TRADEMARKS [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
          SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***].  Subject
          to the license granted to Wyeth-Ayerst under Section 3.1 hereof,
          GalaGen, in consultation with Wyeth-Ayerst, shall select and own the
          GalaGen Trademarks for marketing the [**CONFIDENTIAL TREATMENT
          REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
          EXCHANGE COMMISSION***] in the Territory.  All expenses for (i)
          registration of such Trademarks and (ii) bringing, maintaining and
          prosecuting any action to protect or defend such GalaGen Trademarks
          shall be borne by GalaGen and GalaGen shall retain all recoveries
          therefrom.  If permitted by applicable laws and regulations
          Wyeth-Ayerst shall signify that the Product includes a [**CONFIDENTIAL
          TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
          SECURITIES AND EXCHANGE COMMISSION***] by including the GalaGen
          Trademark, in a visible and readable form, on the label or package for
          the Product and GalaGen shall provide Wyeth-Ayerst with camera ready
          artwork of such GalaGen Trademark for such purpose.  The location and
          size of the GalaGen Trademark on such label or package shall be
          determined by Wyeth-Ayerst.  Wyeth-Ayerst shall not and shall not
          authorize any of its Affiliates or sublicensees to (i) use the GalaGen
          Trademarks on any product other than Products or (ii) use any
          trademark that is confusingly similar to the GalaGen Trademarks, in
          either case without the prior written consent of GalaGen.  Each Party
          agrees to notify the other Party, in writing, of any claim or action
          for infringement or unfair competition relating to the GalaGen
          Trademarks which are threatened or brought against such Party by a
          Third Party, and of any conflicting uses of, applications or
          registrations for, or acts of infringement or unfair competition
          involving the GalaGen Trademarks promptly after such Party learns of
          any such matter.  The Parties shall cooperate in the defense or
          prosecution of any 


                                          23
<PAGE>

          such claims, which cooperation shall include, without limitation,
          providing to the other Party all records, documents and specimens in
          its possession relating to such claim or action and causing its
          employees to give testimony relating to such claim or action, 


8.   PROSECUTION, MAINTENANCE AND INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS.

     8.1  PATENTABLE INVENTIONS.

          8.1.1     OWNERSHIP OF PATENTABLE INVENTIONS.  Wyeth-Ayerst shall own
                    all Inventions made solely by its employees and agents, and
                    all patent applications and patents claiming such
                    Inventions.  GalaGen shall own all Inventions made solely by
                    its employees and agents, and all patent applications and
                    patents claiming such Inventions.  All Inventions made
                    jointly by employees or agents of GalaGen and employees or
                    agents of Wyeth-Ayerst and all patent applications and
                    patents claiming such Inventions shall be owned jointly by
                    GalaGen and Wyeth-Ayerst.  All determinations of
                    inventorship under this Section 8.1.1 shall be in accordance
                    with United States law.

          8.1.2     PATENT PROCUREMENT.  Wyeth-Ayerst and GalaGen shall each
                    disclose to the other and discuss any Inventions and the
                    desirability of filing a United States patent application
                    covering the Invention, as well as any foreign counterpart
                    patent applications.  The Party owning the Invention shall
                    make the final decision with respect to any such filings and
                    shall have the right to select patent counsel and to take
                    such other actions as are reasonably appropriate to prepare,
                    file, prosecute and maintain patent protection with respect
                    to its Inventions arising under this Section 8.1.  With
                    respect to jointly owned Inventions, the Parties shall meet
                    to determine in what countries, if any, patent applications
                    claiming such joint Inventions should be filed.  In the
                    event that either Party does not wish to share in the
                    expenses of both filing and prosecuting patent applications
                    claiming such joint Inventions in any country of the
                    Territory, such Party shall promptly assign or cause to be
                    assigned to the other Party all of its right, title and
                    interest in and to such joint Invention and thereafter such
                    joint Invention shall be treated as an Invention solely
                    owned by such other Party for all purposes of this
                    Agreement.  In the event both Parties desire to share in the
                    expenses of applying for, obtaining and maintaining patents
                    claiming such a joint Invention in one or more countries of
                    the 


                                          24
<PAGE>


                    Territory Wyeth-Ayerst shall file and prosecute any patent
                    applications thereon in such countries and the out-of-pocket
                    expenses incurred by Wyeth-Ayerst in preparing, filing, and
                    prosecuting such joint patent applications and in
                    maintaining any patents issued therefrom shall be shared
                    equally by the Parties.  GalaGen shall reimburse
                    Wyeth-Ayerst for its share of such expenses pursuant to
                    invoices submitted to GalaGen by Wyeth-Ayerst and shall pay
                    to Wyeth-Ayerst the amount due for each such invoice within
                    [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]
                    of GalaGen's receipt of such invoice.

     8.2  PROSECUTION AND MAINTENANCE OF PATENT RIGHTS.   Each Party shall be
          responsible for prosecuting and maintaining its own Patent Rights
          throughout the Territory, subject to Section 8.1.2.  To facilitate
          such decision-making, each Party will appoint a "patent coordinator",
          who will have the authority to make such decision on behalf of such
          Party.  Except as otherwise provided in Section 8.1.2, all expenses
          for filing, prosecuting and maintaining a Party's Patent Rights shall
          be borne in full by such Party.

     8.3  PATENT EXTENSIONS.  The Party holding a Patent Right, if requested by
          and with the assistance of the other Party, shall apply in a timely
          manner for such patent term extensions or patent term restoration
          certificates for such Patent Right as are available under the Federal
          Drug Price Competition and Patent Term Restoration Act of 1984 (Pub.
          L. No. 98-417), and any amendments thereof or any successor acts
          thereto in the USA or similar legislation in other countries of the
          Territory.  All expenses incurred in connection with such patent term
          extensions or patent restoration certificates shall be borne in full
          by the Party holding such Patent Right.

     8.4  COOPERATION.  Each of the Parties shall execute or have executed by
          its appropriate employees, representatives, agents and contractors
          such documents as may be necessary to obtain, perfect or maintain any
          Patent Rights filed or to be filed pursuant to this Agreement, and to
          cooperate with the other Party so far as reasonably necessary with
          respect to furnishing all information and data in its possession
          reasonably necessary to obtain or maintain such Patent Rights.

     8.5  INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS.

          8.5.1     PROSECUTION OF INFRINGEMENT.

                    (a)  If either Party should become aware of any infringement
                         or


                                          25
<PAGE>

                         threatened infringement or misappropriation, as the
                         case may be, in any country of the Territory, of any
                         Intellectual Property Rights of the other Party, it
                         shall promptly notify such other Party in writing.  As
                         soon as practicable the Parties shall confer on the
                         particulars of such infringement or misappropriation
                         and the possible courses of action to be taken.  The
                         Party holding the affected Intellectual Property Rights
                         shall have the right, but not the obligation, to
                         institute, prosecute and control any legal proceedings
                         in its own name by its own counsel and at its own
                         expense, subject to Section 8.5.1(d), to prevent or
                         restrain such infringement, and the other Party shall
                         have the right, at its own expense, to be represented
                         in such action by its own counsel.  If one Party brings
                         any such action or proceeding, the other Party hereby
                         consents to being joined as a party plaintiff where
                         necessary and, in case of  joining, such other Party
                         agrees to give the first Party reasonable assistance
                         and authority to file and to prosecute such suit, at
                         the expense of the Party bringing such suit.

                    (b)  Notwithstanding the foregoing, the Parties shall
                         jointly determine which Party shall have the primary
                         right and responsibility (but not the obligation) to
                         institute, prosecute, and control any action or
                         proceeding with respect to infringement or
                         misappropriation of jointly owned Intellectual Property
                         Rights and the other Party shall have the right, at its
                         expense, to be represented by its counsel.  Each Party
                         hereby consents to the filing of any such action by the
                         other Party with respect to any jointly owned Patent
                         Rights in accordance with this Section 8.5.1(b).

                    (c)  If one Party alone prosecutes an infringement or
                         misappropriation of Intellectual Property Rights, after
                         payment of its legal costs and expenses, any damages
                         and costs recovered in any proceedings or by way of
                         settlement under Sections 8.5.1(a) and 8.5.1(b) above
                         or Section 8.5.2 shall belong to the Party bringing
                         such action, subject to payment therefrom to the other
                         Party of a reasonable sum to compensate the latter for
                         loss of profits, as applicable.
                    
                    (d)  If both Parties participate in prosecuting an
                         infringement or misappropriation of Intellectual
                         Property Rights, any damages and costs recovered in any
                         proceedings or by way 


                                          26
<PAGE>

                         of settlement under this Section 8.5.1 shall be shared
                         by the Parties as follows:

                    [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]

          8.5.2     OTHER PARTY'S RIGHT TO PROSECUTE INFRINGEMENT.  If the Party
                    having the primary right to institute, prosecute, and
                    control such infringement or misappropriation action under
                    Section 8.5.1 fails to do so within a period of
                    [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]
                    after receiving notice of the infringement, or if that
                    Party, after initiating an action, determines to discontinue
                    such action, the other Party shall have the right, but not
                    the obligation, to bring and control or take over any such
                    action by counsel of its own choice, and its own expense,
                    subject to Section 8.5.1(c) unless prevented from doing so
                    by the laws of the country where the infringement or
                    misappropriation occurred or is threatened.

          8.5.3     SETTLEMENTS.  In connection with any proposed settlement in
                    respect of any infringement or threatened infringement of
                    any Intellectual Property Rights, the Party intending to
                    settle shall notify and consult with the other Party as to
                    the terms of settlement, whose written consent shall be
                    required prior to any such settlement, such consent not to
                    be unreasonably withheld.

          8.5.4     COOPERATION.  In connection with any action taken by either
                    Party against a Third Party to protect or enforce any
                    Intellectual Property Rights, the other Party shall, if
                    requested, consult with the Party taking such action, and
                    make available as witnesses its employees or as evidence any
                    materials, and/or data as are reasonably necessary for the
                    furtherance of such action.  The expenses in connection with
                    the providing of witnesses and/or the making available of
                    any materials and/or data shall be borne by the Party
                    incurring them, and reimbursed pursuant to Section 8.5.1(d).

     8.6  INFRINGEMENT OF THIRD PARTY PATENT RIGHTS.

          8.6.1     INFRINGEMENT OF THIRD PARTY PATENTS.  If Wyeth-Ayerst should
                    be of the opinion that it cannot make, import, use, market
                    and/or sell a Product in any country of the Territory under
                    its own Intellectual Property Rights or those licensed to it
                    by GalaGen under this 


                                          27
<PAGE>

                    Agreement without infringing a Third Party's patent, it
                    shall notify GalaGen.  Both Parties then shall seek an
                    opinion of patent counsel acceptable to both Parties.  If
                    such patent counsel concurs with Wyeth-Ayerst's opinion,
                    they shall, at Wyeth-Ayerst's sole option, jointly or
                    independently endeavor to secure a license from the Third
                    Party on terms that are reasonably acceptable to both
                    Parties.

          8.6.2     OPINION OF COUNSEL.  If, in the opinion of patent counsel
                    selected under Section 8.6.1, the Third Party patent, if
                    litigated, would be found invalid or not infringed by the
                    manufacture, use or sale of Product or if the Parties
                    otherwise mutually agree to obtain a license to such Third
                    Party patent, the Parties shall proceed in accordance with
                    the terms of this Agreement, unless an action for
                    infringement is brought against one or both Parties.

          8.6.3     DEFENSE AGAINST CLAIM OF INFRINGEMENT.  If either Party is
                    sued for infringement of any Third Party patents arising out
                    of the manufacture, use, sale or importation of a Product in
                    any country of the Territory, the Parties shall promptly
                    meet to discuss the course of action to be taken to resolve
                    or defend any such infringement litigation.  Each Party
                    shall provide the other with such assistance as is
                    reasonably necessary and shall cooperate in the defense of
                    any such action.  If the allegation of infringement is due
                    to or based on the use of [**CONFIDENTIAL TREATMENT
                    REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
                    SECURITIES AND EXCHANGE COMMISSION***] in a Product then,
                    the cost/expense of defending such action incurred by
                    Wyeth-Ayerst and any damages and/or other compensation
                    imposed on Wyeth-Ayerst, by settlement or otherwise, in such
                    country shall be shared equally by the Parties.  GalaGen
                    shall pay its share of such amounts pursuant to invoices
                    submitted periodically by Wyeth-Ayerst which invoices shall
                    be due and payable within thirty (30) days of GalaGen's
                    receipt thereof.  In the event that Wyeth-Ayerst has not
                    made all payments due to GalaGen under this Agreement,
                    Wyeth-Ayerst may deduct amounts due to Wyeth-Ayerst from
                    GalaGen under this Section 8.6.3  from any amounts otherwise
                    due GalaGen under this Agreement.


9.   TERM AND TERMINATION.

     9.1  TERM. This Agreement shall be effective as of the Effective Date and
          unless terminated earlier by mutual written agreement of the Parties
          or pursuant to Sections 9.2 or 9.3 below, the Term of this Agreement
          shall 


                                          28
<PAGE>

          continue in effect until the later of (i) expiration of the last to
          expire GalaGen Patent Right incorporating a Valid Claim which, but for
          the license granted under Section 3.1.1 hereof, would be infringed by
          the manufacture, use or sale of a Product by Wyeth-Ayerst hereunder or
          (ii) ten (10) years after the First Commercial Sale of a Product. Upon
          the expiration of this Agreement pursuant to this Section 9.1,
          Wyeth-Ayerst's licenses pursuant to Section 3.1 shall become fully
          paid-up, perpetual, exclusive licenses subject only to any sublicenses
          granted by Wyeth-Ayerst that are in effect at such time, including,
          without limitation, any sublicenses granted to GalaGen under either
          Section 3.3 or 4.3 hereof, which sublicenses shall also survive the
          expiration of this Agreement in accordance with their respective
          terms.  The right of GalaGen to obtain additional sublicenses with
          respect to Other Products in accordance with Section 3.3 hereof shall
          also survive the expiration of this Agreement.

     9.2  TERMINATION FOR CAUSE. 

          9.2.1     TERMINATION FOR CAUSE.  This Agreement may be terminated by
                    written notice by either Party at any time during the Term
                    of this Agreement:

                    (a)  for material breach by the other Party, which breach
                         remains uncured for [**CONFIDENTIAL TREATMENT
                         REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
                         SECURITIES AND EXCHANGE COMMISSION***] in the case of
                         nonpayment of any amount due and [**CONFIDENTIAL
                         TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
                         WITH THE SECURITIES AND EXCHANGE COMMISSION***] for all
                         other breaches, each measured from the date written
                         notice of such breach is given to the breaching Party,
                         or, if such breach is not susceptible of cure within
                         such [**CONFIDENTIAL TREATMENT REQUESTED; PORTION
                         OMITTED FILED SEPARATELY WITH THE SECURITIES AND
                         EXCHANGE COMMISSION***] and the breaching Party uses
                         diligent good faith efforts to cure such breach, for
                         [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED
                         FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                         COMMISSION***] after written notice to the breaching
                         Party; or

                    (b)  upon the filing or institution of bankruptcy,
                         reorganization, liquidation or receivership
                         proceedings, or upon an assignment of a substantial
                         portion of the assets for the 


                                          29
<PAGE>

                         benefit of creditors by the other Party, or in the
                         event a receiver or custodian is appointed for such
                         Party's business, or if a substantial portion of such
                         Party's business is subject to attachment or similar
                         process; PROVIDED, HOWEVER, that in the case of any
                         involuntary bankruptcy proceeding such right to
                         terminate shall only become effective if the proceeding
                         is not dismissed within [**CONFIDENTIAL TREATMENT
                         REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
                         SECURITIES AND EXCHANGE COMMISSION***] after the filing
                         thereof.

          9.2.2     EFFECT OF TERMINATION FOR CAUSE ON LICENSE.

                    (a)  In the event Wyeth-Ayerst terminates this Agreement
                         under Section 9.2.1(a), Wyeth-Ayerst's licenses
                         pursuant to Section 3.1 shall become fully paid-up,
                         perpetual licenses.  

                    (b)  In the event that GalaGen terminates this Agreement
                         under Section 9.2.1(a), then the rights and licenses
                         granted to Wyeth-Ayerst under Section 3.1 of this
                         Agreement shall terminate and all rights to the GalaGen
                         Patent Rights and [**CONFIDENTIAL TREATMENT REQUESTED;
                         PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES
                         AND EXCHANGE COMMISSION***] shall revert to GalaGen. 
                         Additionally, the Parties will negotiate, in good
                         faith, the grant by Wyeth-Ayerst of a license to
                         GalaGen, on appropriate commercial terms, of any of
                         Wyeth-Ayerst's Patent Rights or Know-How solely as such
                         Patent Rights or Know-How relate to GalaGen's rights to
                         manufacture and sell the [**CONFIDENTIAL TREATMENT
                         REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
                         SECURITIES AND EXCHANGE COMMISSION***] for use in
                         Products.  

                    (c)  In the event Wyeth-Ayerst terminates this Agreement
                         under Section 9.2.1(b) or this Agreement is otherwise
                         terminated under Section 9.2.1(b), the Parties agree
                         that Wyeth-Ayerst, as a licensee of rights to
                         intellectual property under this Agreement, shall
                         retain and may fully exercise all of its rights and
                         elections under Title 11 (as such term is defined in
                         Section 9.6.1 hereof), including as set forth in
                         Section 9.6 hereof.

     9.3  UNILATERAL TERMINATION BY WYETH-AYERST. Wyeth-Ayerst shall have the
          right to unilaterally terminate this Agreement, on a country by
          country and 


                                          30
<PAGE>

          Product by Product basis, upon [**CONFIDENTIAL TREATMENT REQUESTED;
          PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***] written notice to GalaGen.  In the event of such
          termination by Wyeth-Ayerst, all Wyeth-Ayerst's rights to use the
          [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***] in such Products in
          such country shall revert to GalaGen.  If Wyeth-Ayerst terminates this
          Agreement with respect to Pediatric Formula Products, Wyeth-Ayerst
          shall not be obligated to make any other payments under Section 5.1 of
          this Agreement for events which occur after the effective date of such
          termination and, in such event payments made by Wyeth-Ayerst to
          GalaGen under Article 5 hereof prior to such date shall be
          non-refundable.



     9.4  GENERAL CONDITIONS OF EXPIRATION AND TERMINATION.

          9.4.1     EFFECT ON SUBLICENSEES.  Any permitted sublicenses granted
                    by Wyeth-Ayerst hereunder shall automatically terminate or
                    expire at the same time as this Agreement expires (insofar
                    as they have not already terminated), except where, and to
                    the extent, any license granted hereunder survives
                    expiration of this Agreement, as expressly provided in this
                    Agreement.  Upon early termination of this Agreement, for
                    any reason, with respect to a particular Product in a given
                    country or countries if any permitted sublicensee of such
                    Product in such country(ies) is not then in default under
                    its sublicense agreement with Wyeth-Ayerst, then such
                    sublicensee shall automatically have a license under this
                    Agreement as a direct licensee of GalaGen with respect to
                    such Product in such country(ies), on economic terms as are
                    set forth herein with respect to Wyeth-Ayerst and otherwise
                    with the same rights and obligations as Wyeth-Ayerst under
                    this Agreement.

          9.4.2     EFFECT ON RIGHTS TO OTHER PRODUCTS.  Except for a
                    termination of this Agreement by GalaGen pursuant to Section
                    9.2.1(a) hereof, the expiration or termination of this
                    Agreement shall not affect the rights of GalaGen or
                    Wyeth-Ayerst under Section 3.3 of this Agreement or under
                    any sublicense granted to GalaGen under Section 4.3 of this
                    Agreement.

          9.4.3     SURVIVAL.  The provisions of Articles 6, 10, 12 and Sections
                    2.6.3, 2.8, 3.3, 7.1, 8.1, 9.4, 13.6, 13.7, and 13.11 shall
                    survive termination or expiration of this Agreement.


                                          31
<PAGE>

          9.4.4     PRIOR OBLIGATIONS; REMEDIES.  Termination or expiration of
                    this Agreement shall not operate to deprive either Party of
                    any rights or remedies either at law or in equity or to
                    relieve either Party of any of its obligations incurred
                    prior to the effective date of such termination or
                    expiration.

     9.5  NO LIMIT ON REMEDIES.  Nothing herein shall exclude or limit any
          remedies or entitlements whatsoever which the law confers to either
          Party in the event of a breach of contractual obligations by the other
          Party.

     9.6  INSOLVENCY.  

          9.6.1     EFFECT ON LICENSES.  All rights and licenses granted under
                    or pursuant to this Agreement by GalaGen to Wyeth-Ayerst
                    are, for all purposes of Section 365(n) of Title 11 of the
                    United States Code ("Title 11"), licenses of rights to
                    "intellectual property" as defined in Title 11.  GalaGen
                    agrees that Wyeth-Ayerst, as licensee of such rights under
                    this Agreement shall retain and may fully exercise all of
                    its rights and elections under Title 11.  GalaGen agrees
                    during the Term of this Agreement to create and maintain
                    current copies or, if not amenable to copying, detailed
                    descriptions or other appropriate embodiments, to the extent
                    feasible, of all such intellectual property.  If a case is
                    commenced by or against GalaGen under Title 11, GalaGen (in
                    any capacity, including debtor-in-possession) and its
                    successors and assigns (including, without limitation, a
                    Title 11 Trustee) shall,

                         (i)  as Wyeth-Ayerst may elect in a written request,
                              immediately upon such request:

                                (A)     perform all of the obligations provided
                                        in this Agreement to be performed by
                                        GalaGen including, where applicable and
                                        without limitation, providing to
                                        Wyeth-Ayerst portions of such
                                        intellectual property (including
                                        embodiments thereof) held by GalaGen and
                                        such successors and assigns or otherwise
                                        available to them; or 

                                (B)     provide to Wyeth-Ayerst all such
                                        intellectual property (including all
                                        embodiments thereof) held by GalaGen and
                                        such successors and assigns or otherwise
                                        available to them; and


                                          32
<PAGE>

                         (ii) not interfere with the rights of Wyeth-Ayerst
                              under this Agreement, or any agreement
                              supplemental hereto, to such intellectual property
                              (including such embodiments), including any right
                              to obtain such intellectual property (or such
                              embodiments) from another entity.

          9.6.2     RIGHTS TO INTELLECTUAL PROPERTY.  If a Title 11 case is
                    commenced by or against GalaGen, and this Agreement is
                    rejected as provided in Title 11, and Wyeth-Ayerst elects to
                    retain its rights hereunder as provided in Title 11, then
                    GalaGen (in any capacity, including debtor-in-possession)
                    and its successors and assigns (including, without
                    limitation, a Title 11 Trustee) shall provide to
                    Wyeth-Ayerst all such intellectual property (including all
                    embodiments thereof) held by GalaGen and such successors and
                    assigns, or otherwise available to them, immediately upon
                    Wyeth-Ayerst's written request.  Whenever GalaGen or any of
                    its successors or assigns provides to Wyeth-Ayerst any of
                    the intellectual property licensed hereunder (or any
                    embodiment thereof) pursuant to this Section 9.6,
                    Wyeth-Ayerst shall have the right to perform the obligations
                    of GalaGen hereunder with respect to such intellectual
                    property, but neither such provision nor such performance by
                    Wyeth-Ayerst shall release GalaGen from any such obligation
                    or liability for failing to perform it.

          9.6.3     WYETH-AYERST'S RIGHTS.  All rights, powers and remedies of
                    Wyeth-Ayerst provided herein are in addition to and not in
                    substitution for any and all other rights, powers and
                    remedies now or hereafter existing at law or in equity
                    (including, without limitation, Title 11) in the event of
                    the commencement of a Title 11 case by or against GalaGen. 
                    Wyeth-Ayerst, in addition to the rights, power and remedies
                    expressly provided herein, shall be entitled to exercise all
                    other such rights and powers and resort to all other such
                    remedies as may now or hereafter exist at law or in equity
                    (including, without limitation, Title 11) in such event. 
                    The Parties agree that they intend the foregoing
                    Wyeth-Ayerst rights to extend to the maximum extent
                    permitted by law, including, without limitation, for
                    purposes of Title 11:

                         (i)  the right of access to any intellectual property
                              (including all embodiments thereof) of GalaGen, or
                              any Third Party with whom GalaGen contracts to
                              perform an obligation of GalaGen under this
                              Agreement, and, in the case of the Third Party,
                              which is necessary for the development,


                                          33
<PAGE>

                              registration, manufacture and marketing of
                              [**CONFIDENTIAL TREATMENT REQUESTED; PORTION
                              OMITTED FILED SEPARATELY WITH THE SECURITIES AND
                              EXCHANGE COMMISSION***] and/or Products; and 

                        (ii)  the right to contract directly with any Third
                              Party described in (i) to complete the contracted
                              work.

10.  INDEMNIFICATION AND INSURANCE.

     10.1 INDEMNIFICATION BY WYETH-AYERST.  Wyeth-Ayerst shall indemnify, defend
          and hold harmless GalaGen and its Affiliates, and each of its and
          their respective employees, officers, directors and agents (each, a
          "GalaGen Indemnified Party") from and against any and all liability,
          loss, damage, cost, and expense (including reasonable attorneys' fees)
          (collectively, a "Liability") which the GalaGen Indemnified Party may
          incur, suffer or be required to pay resulting from or arising in
          connection with (i) the breach by Wyeth-Ayerst of any representation
          or warranty contained in this Agreement; (ii) the manufacture,
          promotion, distribution, use, testing, marketing, sale or other
          disposition of Products by Wyeth-Ayerst, its Affiliates or
          sublicensees; or (iii) the successful enforcement by a GalaGen
          Indemnified Party of its rights under this Section 10.1. 
          Notwithstanding the foregoing, Wyeth-Ayerst shall have no obligation
          under this Agreement to indemnify, defend or hold harmless any GalaGen
          Indemnified Party with respect to claims, demands, costs or judgments
          which result from either (x) the failure of [**CONFIDENTIAL TREATMENT
          REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
          EXCHANGE COMMISSION***] supplied by GalaGen or its Affiliates or
          subcontractors to comply with the specifications as set forth in the
          Manufacturing and Supply Agreement or the applicable Regulatory
          Approvals or (y) the willful misconduct or negligent acts or omissions
          of GalaGen, its Affiliates, or any of their respective employees,
          officers, directors or agents.

     10.2 INDEMNIFICATION BY GALAGEN.  GalaGen shall indemnify, defend and hold
          harmless Wyeth-Ayerst and its Affiliates, and each of its and their
          respective employees, officers, directors and agents (each, a
          "Wyeth-Ayerst Indemnified Party") from and against any Liability which
          the Wyeth-Ayerst Indemnified Party may incur, suffer or be required to
          pay resulting from or arising in connection with (i) the breach by
          GalaGen of any representation or warranty contained in this Agreement;
          (ii) the 


                                          34
<PAGE>

          discovery, development, manufacture, promotion, sale or use of
          [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***] or Other Products by
          GalaGen, its Affiliates or their subcontractors or permitted
          sublicensees; or (iii) the successful enforcement by a Wyeth-Ayerst
          Indemnified Party of its rights under this Section 10.2. 
          Notwithstanding the foregoing, GalaGen shall have no obligation under
          this Agreement to indemnify, defend, or hold harmless any Wyeth-Ayerst
          Indemnified Party with respect to claims, demands, costs or judgments
          which result from willful misconduct or negligent acts or omissions of
          Wyeth-Ayerst, its Affiliates, or any of their respective employees,
          officers, directors or agents.

     10.3 CONDITIONS TO INDEMNIFICATION.  The obligations of the indemnifying
          Party under Sections 10.1 and 10.2 are conditioned upon the delivery
          of written notice to the indemnifying Party of any potential Liability
          promptly after the indemnified Party becomes aware of such potential
          Liability, PROVIDED, HOWEVER, that the failure to give such notice
          promptly shall not impair a Party's rights to indemnification under
          this Article 10 unless the delay in providing such notice has a
          material adverse effect on the ability of the indemnifying Party to
          defend against such Liability.  The indemnifying Party shall have the
          right to assume the defense of any suit or claim related to the
          Liability if it has assumed responsibility for the suit or claim in
          writing; however, if in the reasonable judgment of the indemnified
          Party, such suit or claim involves an issue or matter which could have
          a materially adverse effect on the business operations or assets of
          the indemnified Party, the indemnified Party may waive its rights to
          indemnity under this Agreement and control the defense or settlement
          thereof, but in no event shall any such waiver be construed as a
          waiver of any indemnification rights such Party may have at law or in
          equity.  If the indemnifying Party defends the suit or claim, the
          indemnified Party may participate in (but not control) the defense
          thereof at its sole cost and expense.

     10.4 SETTLEMENTS.  Neither Party may settle a claim or action related to a
          Liability without the consent of the other Party, if such settlement
          would impose any monetary obligation on the other Party or require the
          other Party to submit to an injunction or otherwise limit the other
          Party's rights under this Agreement.  Any payment made by a Party to
          settle any such claim or action shall be at its own cost and expense
          except in the event that such payment was made with the prior written
          consent of the indemnifying Party, in which case such payment will be
          subject to the indemnification obligations of the Parties as set forth
          in this Article 10.


                                          35
<PAGE>

     10.5 INSURANCE.  Each Party further agrees to use reasonable commercial
          efforts to obtain and maintain, during the term of this Agreement,
          Comprehensive General Liability Insurance, including Products
          Liability Insurance, with reputable and financially secure insurance
          carriers to cover its indemnification obligations under Sections 10.1
          or 10.2, as applicable, or, in the case of Wyeth-Ayerst,
          self-insurance, in each case with limits of not less than
          [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***].

11.  REPRESENTATIONS AND WARRANTIES.

     11.1 REPRESENTATIONS AND WARRANTIES OF EACH PARTY.  Each of GalaGen and
          Wyeth-Ayerst hereby represents, warrants and covenants to the other
          Party hereto as follows:

          (a)  it is a corporation or entity duly organized and validly existing
               under the laws of the state or other jurisdiction of
               incorporation or formation;

          (b)  the execution, delivery and performance of this Agreement by such
               Party has been duly authorized by all requisite corporate action
               and does not require any shareholder action or approval;

          (c)  it has the power and authority to execute and deliver this
               Agreement and to perform its obligations hereunder;

          (d)  the execution, delivery and performance by such Party of this
               Agreement and its compliance with the terms and provisions hereof
               does not and will not conflict with or result in a breach of any
               of the terms and provisions of or constitute a default under (i)
               a loan agreement, guaranty, financing agreement, agreement
               affecting a product or other agreement or instrument binding or
               affecting it or its property; (ii) the provisions of its charter
               or operative documents or bylaws; or (iii) any order, writ,
               injunction or decree of any court or governmental authority
               entered against it or by which any of its property is bound; and

          (e)  it shall comply with all applicable material laws and regulations
               relating to its activities under this Agreement.

     11.2 REPRESENTATIONS AND WARRANTIES OF GALAGEN.  In addition to the
          representations and warranties made by GalaGen under Section 11.1


          above, GalaGen hereby further represents and warrants to Wyeth-Ayerst
          that:


                                          36
<PAGE>

          (a)  As of the Effective Date, the GalaGen Patent Rights and Know-How
               are existing and, to the best of its knowledge, are not invalid
               or unenforceable, in whole or in part;

          (b)  it has the full right, power and authority to grant all of the
               right, title and interest in the licenses granted under Article 3
               hereof;

          (c)  it has not, prior to the Effective Date, previously assigned,
               transferred, conveyed or otherwise encumbered its right, title
               and interest in any of the [**CONFIDENTIAL TREATMENT REQUESTED;
               PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
               COMMISSION***], Products, the GalaGen Patent Rights or Know-How
               or the GalaGen Trademarks, with respect to which Wyeth-Ayerst has
               been granted a license or other rights hereunder;

          (d)  it is the sole and exclusive owner of the GalaGen Patent Rights
               and  Know-How and GalaGen Trademarks existing as of the Effective
               Date, all of which are free and clear of any liens, charges and
               encumbrances, and no other person, corporate or other private
               entity, or governmental entity or subdivision thereof, has or
               shall have any claim of ownership with respect to the GalaGen
               Patent Rights or Know-How or the GalaGen Trademarks existing as
               of the Effective Date, whatsoever;

          (e)  to the best of its knowledge the GalaGen Patent Rights and
               Know-How, and the development, manufacture, use, distribution,
               marketing, promotion and sale of [**CONFIDENTIAL TREATMENT
               REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES
               AND EXCHANGE COMMISSION***] or Products do not, as of the
               Effective Date, interfere or infringe on any intellectual
               property rights owned or possessed by any Third Party;

          (f)  as of the Effective Date, there are no claims, judgments or
               settlements against or owed by GalaGen or, to the best of its
               knowledge, pending or threatened claims or litigation relating to
               [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
               SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***], the
               GalaGen Patent Rights or Know-How and the GalaGen Trademarks;




                                          37
<PAGE>

          (g)  during the Term of this Agreement it will use diligent efforts
               not to diminish the rights under the GalaGen Patent Rights and
               Know-How and the GalaGen Trademarks licensed to Wyeth-Ayerst
               hereunder, including without limitation, by not committing or
               permitting any actions or omissions which would cause the breach
               of any agreements between itself and Third Parties which provide
               for Intellectual Property Rights applicable to the development,
               manufacture, use or sale of [**CONFIDENTIAL TREATMENT REQUESTED;
               PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
               COMMISSION***] and/or Products, that it will provide Wyeth-Ayerst
               promptly with notice of any such alleged breach, and that as of
               the Effective Date, it is in compliance in all material respects
               with any agreements with Third Parties relating to the GalaGen
               Patent Rights and Know How,  the GalaGen Trademarks, the
               [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
               SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***] and/or
               the Products.

     11.3 REPRESENTATIONS AND WARRANTIES OF WYETH-AYERST.  In addition to the
          representations and warranties made by Wyeth-Ayerst under Section 11.1
          above, Wyeth-Ayerst hereby further represents and warrants to GalaGen
          that the Products manufactured and sold by Wyeth-Ayerst hereunder,
          which Products contain [**CONFIDENTIAL TREATMENT REQUESTED; PORTION
          OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***], manufactured by GalaGen in accordance with the
          Specifications (as such term is defined in the Manufacturing and
          Supply Agreement) and supplied to Wyeth-Ayerst by GalaGen under the
          Manufacturing and Supply Agreement, shall:

          (a)  be manufactured, stored and shipped in accordance with GMPs, as
               applicable and all other applicable material laws, rules,
               regulations or requirements in effect at the time of the
               manufacture of such Product; and

          (b)  not be adulterated or misbranded as provided for under any
               applicable law, order or regulation then in effect in the country
               in which such Product is being sold as of the time that
               Wyeth-Ayerst sells such Product to a Third Party.

     11.4 [***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***]


                                          38
<PAGE>

     11.5 NO INCONSISTENT AGREEMENTS.  Except as otherwise provided in Section
          11.4 above, neither Party has in effect and after the Effective Date
          neither Party shall enter into any oral or written agreement or
          arrangement that would be inconsistent with its obligations under this
          Agreement.

     11.6 REPRESENTATION BY LEGAL COUNSEL.  Each Party hereto represents that it
          has been represented by legal counsel in connection with this
          Agreement and acknowledges that it has participated in the drafting
          hereof.  In interpreting and applying the terms and provisions of this
          Agreement, the Parties agree that no presumption shall exist or be
          implied against the Party which drafted such terms and provisions.

12.  CONFIDENTIAL INFORMATION; PUBLICATIONS; PUBLICITY

     12.1 NONDISCLOSURE OBLIGATION.  Each of GalaGen and Wyeth-Ayerst shall use
          only in accordance with this Agreement and shall not disclose to any
          Third Party any information received by it from the other Party (the
          "Information"), without the prior written consent of the other Party. 
          The foregoing obligations shall survive [**CONFIDENTIAL TREATMENT
          REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
          EXCHANGE COMMISSION***].  These obligations shall not apply to
          Information that: 

               (i)  is known by the receiving Party at the time of its receipt,
                    and not through a prior disclosure by the disclosing Party,
                    as documented by business records;

              (ii)  is at the time of disclosure or thereafter becomes published
                    or otherwise part of the public domain without breach of
                    this Agreement by the receiving Party;

             (iii)  is subsequently disclosed to the receiving Party by a Third
                    Party who has the right to make such disclosure;

              (iv)  is developed by the receiving Party independently of  the
                    Information received from the disclosing Party and such
                    independent development can be documented by the receiving
                    Party;

               (v)  is disclosed to any institutional review board of any entity
                    conducting clinical trials or any governmental or other
                    regulatory agencies in order to obtain patents or to gain
                    approval to conduct clinical trials or to market
                    [**CONFIDENTIAL TREATMENT REQUESTED; 


                                          39
<PAGE>

                    PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
                    EXCHANGE COMMISSION***] and/or Products, but such disclosure
                    may be made only to the extent reasonably necessary to
                    obtain such patents or authorizations; and, in which case
                    reasonable effort shall be taken to maintain the
                    confidentiality of such Information, or

            (vi)    is required by law, regulation, rule, act or order of any
                    governmental authority or agency to be disclosed by a Party,
                    PROVIDED that notice is promptly delivered to the other
                    Party in order to provide an opportunity to seek a
                    protective order or other similar order with respect to such
                    Information and thereafter the disclosing Party discloses to
                    the requesting entity only the minimum Information required
                    to be disclosed in order to comply with the request, whether
                    or not a protective order or other similar order is obtained
                    by the other Party.

     12.2 PERMITTED DISCLOSURES.  Information may be disclosed to employees,
          agents, consultants, sublicensees or suppliers of the recipient Party
          or its Affiliates, but only to the extent required to accomplish the
          purposes of this Agreement and only if the recipient Party obtains
          prior agreement from its employees, agents, consultants, sublicensees
          or suppliers to whom disclosure is to be made to hold in confidence
          and not make use of such Information for any purpose other than those
          permitted by this Agreement.  Each Party will use at least the same
          standard of care as it uses to protect proprietary or confidential
          information of its own to ensure that such employees, agents,
          consultants, sublicensees or suppliers do not disclose or make any
          unauthorized use of the Information.

     12.3 DISCLOSURE OF AGREEMENT.  Neither GalaGen nor Wyeth-Ayerst shall
          release to any Third Party or publish in any way any non-public
          information with respect to the terms of this Agreement or concerning
          their cooperation without the prior written consent of the other,
          which consent will not be unreasonably withheld or delayed, PROVIDED,
          HOWEVER, that either Party may disclose the terms of this Agreement to
          the extent required to comply with applicable laws, including without
          limitation the rules and regulations promulgated by the United States
          Securities and Exchange Commission and the Party intending to disclose
          the terms of this Agreement shall provide the nondisclosing Party an
          opportunity to review and comment on the intended disclosure which is
          reasonable under the circumstances.  Notwithstanding any other
          provision of this Agreement, each Party may disclose the terms of this
          Agreement to lenders, investment bankers and other financial
          institutions of its choice solely for purposes of financing the
          business operations of such Party 


                                          40
<PAGE>

          either (i) upon the written consent of the other Party or (ii) if the
          disclosing Party uses reasonable efforts to obtain a signed
          confidentiality agreement with such financial institution with respect
          to such information on terms substantially similar to those contained
          in this Article 12.

     12.4 PUBLICITY.  Subject to Section 12.3, all publicity, press releases and
          other announcements relating to this Agreement or the transactions
          contemplated hereby shall be reviewed in advance by, and shall be
          subject to the approval of, both Parties.

     12.5 PUBLICATION.  The Parties shall cooperate in appropriate publication
          of the results of research and development work performed pursuant to
          this Agreement, but subject to their predominating interest in
          obtaining patent protection for any patentable subject matter.  The
          determination of authorship for any paper shall be in accordance with
          accepted scientific practice.  Notwithstanding anything in this
          Section 12.5 to the contrary, all publication and presentations of the
          results of research and development work performed pursuant to this
          Agreement  must be approved in advance by both Parties.

13.  MISCELLANEOUS.

     13.1 FORCE MAJEURE.  Neither Party shall be liable to the other for delay
          or failure in the performance of the obligations on its part contained
          in this Agreement if and to the extent that such failure or delay is
          due to circumstances beyond its control which it could not have
          avoided by the exercise of reasonable diligence.  It shall notify the
          other Party promptly should such circumstances arise, giving an
          indication of the likely extent and duration thereof, and shall use
          all Commercially Reasonable Efforts to resume performance of its
          obligations as soon as practicable.

     13.2 ASSIGNMENT.  

          13.2.1    ASSIGNMENT BY GALAGEN.  GalaGen may assign any of its rights
                    or obligations under this Agreement in any country to any of
                    its Affiliates, for so long as they remain Affiliates. 
                    GalaGen may also assign its rights and obligations under
                    this Agreement in connection with a merger or similar
                    reorganization or the sale of all or substantially all of
                    its assets.  GalaGen shall not otherwise assign any of its
                    rights or obligations under this Agreement without the prior
                    written consent of Wyeth-Ayerst, which consent may be
                    provided or withheld in Wyeth-Ayerst's sole discretion.  Any
                    assignment under this Section 13.2.1 by GalaGen of its
                    rights and/or obligations under this Agreement shall not
                    relieve GalaGen 


                                          41
<PAGE>

                    of its responsibilities for the performance of its
                    obligations under this Agreement.

          13.2.2    ASSIGNMENT BY WYETH-AYERST.  Wyeth-Ayerst may assign any of
                    its rights or obligations under this Agreement in any
                    country to any of its Affiliates or to one or more Third
                    Parties.  Wyeth-Ayerst shall notify GalaGen, in writing,
                    upon making any such assignment.  In the event Wyeth-Ayerst
                    assigns any of its rights or obligations under this
                    Agreement in connection with a merger or similar
                    reorganization or the sale of all or substantially all of
                    its assets or a sale of that part of its business relating
                    to the subject matter of this Agreement, no intellectual
                    property rights of the acquiring corporation shall be
                    included in the technology licensed hereunder.  Any
                    assignment under this Section 13.2.2 by Wyeth-Ayerst shall
                    not relieve Wyeth-Ayerst of its responsibilities for the
                    performance of its obligations under this Agreement.

          13.2.3    BINDING NATURE OF ASSIGNMENT.  This Agreement shall be
                    binding upon and inure to the benefit of the successors and
                    permitted assigns of the Parties.  Any assignment not in
                    accordance with this Section 13.2 shall be void.

          13.3 NO WAIVER.  The failure of either Party to require performance by
               the other Party of any of that other Party's obligations
               hereunder shall in no manner affect the right of such Party to
               enforce the same at a later time.  No waiver by any Party hereto
               of any condition, or of the breach of any provision, term,
               representation or warranty contained in this Agreement, whether
               by conduct or otherwise, in any one or more instances, shall be
               deemed to be or construed as a further or continuing waiver of
               any such condition or breach, or of any other condition or of the
               breach of any other provision, term, representation or warranty
               hereof.

          13.4 SEVERABILITY.  If a court or other tribunal of competent
               jurisdiction should hold any term or provision of this Agreement
               to be excessive, or invalid, void or unenforceable, the offending
               term or provision shall be deleted, and, if possible, replaced by
               a term or provision which, so far as practicable achieves the
               legitimate aims of the Parties.

          13.5 RELATIONSHIP BETWEEN THE PARTIES.   Both Parties are independent
               contractors under this Agreement.  Nothing herein contained shall
               be deemed to create an employment, agency, joint venture or
               partnership relationship between the Parties hereto or any of
               their agents or employees, or any other legal arrangement that
               would impose liability upon one Party for the act or failure to
               act of the other Party.  Neither Party shall have any express or
               implied power to enter into any contracts 



                                          42
<PAGE>

               or commitments or to incur any liabilities in the name of, or on
               behalf of, the other Party, or to bind the other Party in any
               respect whatsoever.

          13.6 CORRESPONDENCE AND NOTICES.

               13.6.1    ORDINARY NOTICES.  Correspondence, reports,
                         documentation, and any other communication in writing
                         between the Parties in the course of ordinary
                         implementation of this Agreement shall be delivered by
                         hand, sent by facsimile, or by airmail to any one
                         member of the JDC appointed by the Party which is to
                         receive such written communication, or any other way as
                         the JDC deems appropriate.

               13.6.2    EXTRAORDINARY NOTICES.  Extraordinary notices and
                         communications (including, without limitation, notices
                         of termination, force majeure, material breach, change
                         of address) shall be in writing and sent by prepaid
                         registered or certified air mail, or by facsimile
                         confirmed by prepaid registered or certified air mail
                         letter, and shall be deemed to have been properly
                         served to the addressee upon receipt of such written
                         communication.

               13.6.3    ADDRESSES FOR NOTICES.  In the case of GalaGen, the
                         proper address for communications and for all payments
                         shall be:

                              GalaGen Inc.
                              4001 Lexington Avenue North
                              Arden Hills, Minnesota  55126  USA
                              Attn:  Chief Executive Officer
                              Fax:  (612) 481-2380

                         and in the case of Wyeth-Ayerst, the proper address for
                         communications and for all payments shall be:
               
                              Wyeth-Ayerst Laboratories
                              555 East Lancaster Avenue
                              St. Davids, Pennsylvania  19087
                              Attn:  Senior Vice President, Global Business
                              Development
                              Fax:  (610) 688-9498
               
                              With a copy to: 
     
                                   American Home Products Corporation
                                   5 Giralda Farms
                                   Madison, New Jersey  07940


                                          43
<PAGE>

                                   Attn:  Senior Vice President and General
                                   Counsel
                                   Fax: (973) 660-7156
          
     13.7 CHOICE OF LAW.  This Agreement is subject to and governed by the laws
          of the State of Delaware, excluding its conflict of laws provisions.
          
     13.8 ENTIRE AGREEMENT; AMENDMENT. This Agreement, together with the other
          Transaction Agreements, including the Exhibits and Schedules hereto
          and thereto and all the covenants, promises, agreements, warranties,
          representations, conditions and understandings contained herein and
          therein sets forth the complete, final and exclusive agreement between
          the Parties and supersedes and terminates all prior and
          contemporaneous agreements and understandings between the Parties,
          whether oral or in writing.  There are no covenants, promises,
          agreements, warranties, representations, conditions or understandings,
          either oral or written, between the Parties other than as are set
          forth in the Transaction Agreements.  No subsequent alteration,
          amendment, change, waiver or addition to this Agreement shall be
          binding upon the Parties unless reduced to writing and signed by an
          authorized officer of each Party.  No understanding, agreement,
          representation or promise, not explicitly set forth herein, has been
          relied on by either Party in deciding to execute this Agreement. 
          
     13.9 HEADINGS. The headings and captions used in this Agreement are solely
          for the convenience of reference and shall not affect its
          interpretation.

   13.10  COUNTERPARTS.  This Agreement may be executed in one or more
          counterparts each of which shall be an original and all of which shall
          constitute together the same document.
          
   13.11  FURTHER ACTIONS.  Each Party agrees to execute, acknowledge and
          deliver such further instruments, and to do all other acts, as may be
          necessary or appropriate in order to carry out the purposes and intent
          of this Agreement including, without limitation, any filings with any
          antitrust agency which may be required.

     IN WITNESS WHEREOF, this Agreement has been executed by the duly authorized
representatives of the Parties as of the date first set forth above.


AMERICAN HOME PRODUCTS CORPORATION      GALAGEN INC.



/s/ Tuan Ha-Ngoc                        /s/ Robert A. Hoerr              
- -----------------------------------     ----------------------------------
Name:  Tuan Ha-Ngoc                     Name:  Robert A. Hoerr
Title: Vice President - Strategic       Title: President & CEO     
       Development



                                          44


<PAGE>
                                          
                         MANUFACTURING AND SUPPLY AGREEMENT


     THIS MANUFACTURING AND SUPPLY AGREEMENT (the "Agreement") is entered into
as of the 15th day of October, 1998 (the "Effective Date"), by and between
GALAGEN INC., a company incorporated under the laws of the State of Delaware,
with its principal place of business at 4001 Lexington Avenue North, Arden
Hills, Minnesota 55126 USA ("GalaGen"), AND AMERICAN HOME PRODUCTS CORPORATION,
acting through its WYETH-AYERST LABORATORIES DIVISION, a company incorporated
under the laws of the State of Delaware, with its principal place of business at
555 East Lancaster Avenue, St. Davids, Pennsylvania  19087, USA
("Wyeth-Ayerst").  Both GalaGen and Wyeth-Ayerst are referred to herein
individually as a "Party" and collectively as the "Parties".

     WHEREAS,  GalaGen has developed proprietary technology with respect to
[**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION***]; and

     WHEREAS, GalaGen and Wyeth-Ayerst, pursuant to that certain Collaboration
and License Agreement entered into by the Parties on even date herewith, are
collaborating with each other to utilize GalaGen's proprietary technology to
[***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION***] and to develop Pediatric Formula Products
and/or Other Products containing [**CONFIDENTIAL TREATMENT REQUESTED; PORTION
OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]; and

     WHEREAS,  Wyeth-Ayerst desires for GalaGen to manufacture and supply it
with such [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
WITH THE SECURITIES AND EXCHANGE COMMISSION***] for use by Wyeth-Ayerst in the
Manufacture of Pediatric Formula Products and Other Products.

     NOW THEREFORE, in consideration of the foregoing premises and the mutual
promises, covenants and conditions contained in this Agreement, the Parties
agree as follows:

1.   DEFINITIONS.

     For the purposes of this Agreement, the capitalized terms hereunder shall
     have the meanings defined below:
     
     1.1  "AFFILIATE(s) shall mean, in the case of either Party, any
          corporation, joint venture, or other business entity which directly or
          indirectly controls, is controlled by, or is under common control with
          that Party.  "Control", as used in this Section 1.1, shall mean having
          the power to direct, or cause the direction of, the management and
          policies of an entity, whether through ownership of voting securities,
          by contract or otherwise. [**CONFIDENTIAL TREATMENT REQUESTED; 


                                          1
<PAGE>

          PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***].

     1.2  "APPROVED FACILITY" shall mean each such Manufacturing facility
          referenced in the Regulatory Approvals as an approved site for the
          Manufacture of the Ingredient and such term includes all GalaGen's
          equipment, machinery and facilities used in the manufacturing, testing
          and storage of the Ingredient.     

     1.3  "BATCH" shall mean a Manufacturing run of Ingredient in an amount to
          be agreed upon in writing by the Parties during the course of the
          Collaboration.

     1.4  "CALENDAR QUARTER" shall mean the respective periods of three (3)
          consecutive calendar months ending on March 31, June 30, September 30
          or December 31, for so long as this Agreement is in effect.

     1.5  "CERTIFICATE OF ANALYSIS" shall mean a document identifying the tests
          required for Ingredient release, results of  those tests for a
          specific lot, and the release specifications, in a form agreed to by
          the Parties in writing.

     1.6  "COLLABORATION" shall mean the research and development program
          conducted jointly by the Parties under the License Agreement for the
          purpose of optimizing the production of [***CONFIDENTIAL TREATMENT
          REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
          EXCHANGE COMMISSION***] and developing and obtaining Regulatory
          Approval for Pediatric Formula Products.

     1.7  "CURRENT GOOD MANUFACTURING PRACTICE" OR "CGMP" shall mean (i) the
          current standards for the manufacture of pharmaceuticals, as set forth
          in the United States Federal Food, Drug and Cosmetics Act and
          applicable regulations promulgated thereunder, as amended from time to
          time, and such standards of good manufacturing practice as are
          required by the European Union and other organizations and
          governmental agencies in countries in which the Products are intended
          to be sold, to the extent such standards are not inconsistent with
          United States cGMP.

     1.8  "FDA" shall mean the United States Food and Drug Administration.

     1.9  "FIRST COMMERCIAL SALE" shall mean, on a Product by Product basis, the
          first sale of such Product in any country of the Territory after such
          Product has been granted Regulatory Approval by the competent
          authorities in such country.

    1.10  "INGREDIENT" shall mean [***CONFIDENTIAL TREATMENT REQUESTED; PORTION
          OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***] and are in a form(s) to be specified by Wyeth-


                                          2
<PAGE>

          Ayerst, which form(s) are reasonably necessary to meet Wyeth-Ayerst's
          or its Affiliates' or sublicensees' needs for the production of
          Products.

    1.11  "KNOW-HOW" shall have the meaning assigned to such term in the License
          Agreement.

    1.12  "LICENSE AGREEMENT" shall mean the Collaboration and License Agreement
          which has been entered into by the Parties on even date herewith.

    1.13  "MANUFACTURE", "MANUFACTURED" OR "MANUFACTURING" shall mean all
          activities involved in the production of Ingredient to be supplied to
          Wyeth-Ayerst, its Affiliates or sublicensees under this Agreement,
          including, without limitation, the [**CONFIDENTIAL TREATMENT
          REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
          EXCHANGE COMMISSION***].

    1.14  "MANUFACTURING COST" shall mean the costs for those items specified in
          Exhibit A which have been incurred by GalaGen in Manufacturing the
          Ingredient for Wyeth-Ayerst hereunder, which costs are calculated in
          accordance with generally accepted accounting principles.

    1.15  "NET SALES" shall mean proceeds from sales of Pediatric Formula
          Products by Wyeth-Ayerst, its Affiliates or sublicensees, as
          appropriate, to Third Parties, less the sum of (a) and (b) where (a)
          is a provision, determined under generally accepted accounting
          principles in the United States, for [**CONFIDENTIAL TREATMENT
          REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
          EXCHANGE COMMISSION***].

          Sales of Pediatric Formula Products by and between a Party and its
          Affiliates are not sales to Third Parties and shall be excluded form
          Net Sales calculations for all purposes.
          
    1.16  "NET SELLING PRICE" shall mean, with respect to a particular Pediatric
          Formula Product, the total Net Sales of such Pediatric Formula
          Product, made during a Calendar Quarter divided by the number of units
          of such Pediatric Formula Product sold during such Calendar Quarter.
          
    1.17  "OTHER PRODUCT(S)" shall mean any product, other than Pediatric
          Formula Products, which contains Ingredient. [**CONFIDENTIAL TREATMENT
          REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
          EXCHANGE COMMISSION***].
          
    1.18  "PEDIATRIC FORMULA PRODUCT(S)" shall mean any  beverage (whether
          supplied in liquid form or as a powder to be mixed with water)
          containing Ingredient for oral consumption by infants and/or children.


                                          3
<PAGE>

     1.19 "PRODUCT(S)" shall mean any Pediatric Formula Product or any Other
          Product.

     1.20 "REGULATORY APPROVAL" shall mean all authorizations by the competent
          authorities which are required for the regular marketing, promotion,
          pricing and sale of a Product in a given country or regulatory
          jurisdiction.

     1.21 "REGULATORY AUTHORITY" shall mean any national, supra-national (e.g.,
          the European Commission, the Council of the European Union, or the
          European Agency for the Evaluation of Medicinal Products), regional,
          state or local regulatory agency, department, bureau, commission,
          council or other governmental entity involved in the granting of
          Regulatory Approval for the Product(s) and/or Ingredient.

     1.22 "SPECIFICATIONS" shall mean specifications for or concerning the
          Manufacturing, testing, quality assurance and packaging of the
          Ingredient as may be agreed upon by the Parties in writing from time
          to time, PROVIDED, HOWEVER, that such Specifications shall comply with
          all applicable Regulatory Approvals for the manufacture and sale of
          Ingredients or Products.

     1.23 "THIRD PARTY(IES)" shall mean any person(s) or entity(ies) other than
          GalaGen, Wyeth-Ayerst or their Affiliates.

     1.24 "TRANSACTION AGREEMENTS" shall mean this Agreement, the License
          Agreement and the Warrant Purchase Agreement entered into by the
          Parties on even date herewith.


2.   MANUFACTURE AND SUPPLY OF INGREDIENT.

     2.1  MANUFACTURE OF INGREDIENT.  During the term and in accordance with the
          provisions of this Agreement, GalaGen shall either manufacture the
          Ingredient at GalaGen's own premises, or, upon Wyeth-Ayerst's prior
          written consent, sub-contract the Manufacture of the Ingredient to a
          Third Party sub-contractor which is acceptable to Wyeth-Ayerst and
          which shall have sufficient knowledge and expertise to carry out the
          Manufacture of the Ingredient and meet Wyeth-Ayerst's requirements for
          the Ingredient.

     2.2  SUPPLY OF WYETH-AYERST'S REQUIREMENTS.  During the term and in
          accordance with the provisions of this Agreement, GalaGen shall
          Manufacture and supply to Wyeth-Ayerst and Wyeth-Ayerst shall purchase
          from GalaGen its entire requirements of the Ingredient for use in its
          manufacture of Products.

     2.3  FORECASTS AND ORDERS.  


                                          4
<PAGE>

          2.3.1     Not less than twelve (12) months prior to its first purchase
                    of Ingredient for use in the manufacture of Products to be
                    sold to Third Parties, Wyeth-Ayerst shall provide GalaGen
                    with a written forecast (by Calendar Quarter) of the
                    quantity of Ingredient that Wyeth-Ayerst desires to have
                    delivered to it during the first twelve (12) month period of
                    Product sales.  Within  six (6) months prior to its first
                    purchase of Ingredient, Wyeth-Ayerst shall provide GalaGen
                    with an updated forecast for the first twelve (12) month
                    period (by Calendar Quarter), and by the beginning of such
                    twelve (12) month period shall provide GalaGen with an
                    updated forecast for the last three (3) Calendar Quarters of
                    such twelve (12) month period and for the Calendar Quarter
                    following immediately thereafter.  Thereafter, at least
                    ninety (90) days before the end of each subsequent Calendar
                    Quarter, Wyeth-Ayerst shall provide a written updated
                    forecast (by Calendar Quarter) in accordance with the
                    provisions of Section 2.3.2 hereof.

          2.3.2     Each successive forecast shall update the forecast
                    previously given for the last three (3) Calendar Quarters
                    covered and add a forecast for the Calendar Quarter
                    following immediately thereafter, to enable GalaGen to have
                    sufficient information to schedule its or its
                    sub-contractors' manufacturing operations to meet
                    Wyeth-Ayerst's forecasted requirements of the Ingredient. 
                    GalaGen acknowledges that such forecasts are only estimates
                    of Wyeth-Ayerst's purchase requirements of the Ingredient
                    and that Wyeth-Ayerst shall not be bound by any such
                    estimate, except that after Regulatory Approval the first
                    Calendar Quarter of each successive forecast so provided
                    shall represent a binding commitment of Wyeth-Ayerst to
                    purchase and of GalaGen to supply such forecasted quantity
                    of Ingredient in a timely manner, subject to adjustment
                    within the limits set forth in Section 2.3.4 hereof.

          2.3.3     Wyeth-Ayerst shall order and maintain reasonable inventories
                    of the Ingredient, having due regard to its current and
                    forecasted sales volumes for the Products.  Wyeth-Ayerst
                    shall issue to GalaGen firm purchase orders for each
                    delivery not later than two (2) months prior to the
                    requested delivery date.  Such purchase orders shall specify
                    the quantity of Ingredient desired, and the place(s) to
                    which and the manner and dates by which delivery is to be
                    made.  To the extent the terms of any purchase order or
                    acknowledgment thereof are inconsistent with the terms of
                    this Agreement, the terms of this Agreement shall control.

          2.3.4     The quantity of Ingredient ordered by Wyeth-Ayerst in any
                    Calendar Quarter shall not be less than seventy-five percent
                    (75%) of the quantity specified in the last binding forecast
                    provided by Wyeth-Ayerst for such Calendar Quarter. 
                    Additionally, GalaGen shall not be obligated to supply that
                    quantity of Ingredient in any Calendar Quarter that is more
                    than one hundred and twenty-five percent (125%) of the last
                    binding forecast provided by Wyeth-Ayerst for the Calendar
                    Quarter in question; PROVIDED, 


                                          5
<PAGE>

                    HOWEVER, that GalaGen shall endeavor to take all reasonable
                    steps to fill purchase orders for the Ingredient in excess
                    of such amount.

          2.3.5     All estimates shall be prepared in good faith in order to
                    facilitate GalaGen's efficient manufacture and shipment of
                    the Ingredient in compliance with this Agreement, and except
                    as set forth in Section 2.3.2 will not be binding upon
                    Wyeth-Ayerst or GalaGen in any way and Wyeth-Ayerst shall
                    not be responsible for any loss or expense of GalaGen's
                    arising from the forecast.

          2.3.6     Notwithstanding any other provision of this Agreement,
                    GalaGen in no event shall be obligated to supply
                    Wyeth-Ayerst with an amount of Ingredient that exceeds
                    seventy percent (70%) of GalaGen's total capacity for the
                    manufacture of Ingredient and all other products.  In the
                    event Wyeth-Ayerst provides GalaGen with good faith
                    forecasts that exceed such capacity, GalaGen agrees that it
                    will use its Commercially Reasonable Efforts to seek and
                    employ subcontractors, as permitted under Section 2.1
                    hereof, to manufacture such excess amounts of Ingredient on
                    commercially reasonable terms. 

     2.4  ALTERNATIVE SUPPLY.  At any time, but no later than a reasonable time
          (which shall not exceed six (6) months plus any delay associated with
          approval of the site of manufacture by a Regulatory Authority) after
          Wyeth-Ayerst's annual purchases of the Ingredient attain a level of
          fifty percent (50%) of GalaGen's total capacity for the manufacture of
          Ingredient and all other products, or if a restriction is imposed upon
          (a) Manufacturing that would prevent GalaGen from meeting its supply
          obligation hereunder or (b) exporting the Ingredient out of the
          country where it is Manufactured, then GalaGen shall use its
          Commercially Reasonable Efforts to establish a second source for
          supply of the Ingredient which second source of supply must be
          reasonably acceptable to Wyeth-Ayerst.

     2.5  STORAGE.  GalaGen shall cause, at its own expense, the maintenance of
          adequate storage accommodations, in accordance with cGMP, for the
          quantities of Ingredient being held by or on behalf of GalaGen pending
          delivery to a carrier in accordance with Article 4 of this Agreement. 

     2.6  MANUFACTURING DATE.  GalaGen shall conduct appropriate studies in
          order to maximize the shelf life of the Ingredient.  GalaGen agrees
          not to supply Ingredient which was manufactured more than three (3)
          months prior to delivery to Wyeth-Ayerst, unless otherwise approved,
          in writing, by Wyeth-Ayerst, such approval not to be unreasonably
          withheld.

     2.7  PERMITTED SUBCONTRACTORS.  GalaGen shall ensure that the permitted
          subcontractors for the Manufacture of the Ingredient have sufficient
          knowledge and expertise to carry out the Manufacture of the Ingredient
          and other subcontracted responsibilities.  In addition GalaGen shall
          ensure that (i) each such subcontractor shall be in




                                          6
<PAGE>

          compliance with cGMPs and shall be under the inspection of all
          relevant Regulatory Authorities and audited to be in compliance
          therewith, and (ii) Wyeth-Ayerst will have the right to inspect and
          audit each such subcontractor's facilities and records as provided in
          Section 3.8 hereof.


3.   TESTING AND QUALITY CONTROL.
     
     3.1  FACILITY COMPLIANCE AND RELATED MATTERS.

          3.1.1     GalaGen covenants that the Approved Facility shall be
                    in compliance with all applicable laws, rules and
                    regulations, including cGMP, at all times during the term of
                    this Agreement. GalaGen shall be responsible for all costs
                    and expenses related to the compliance of the Approved
                    Facility with such laws, rules and regulations related to
                    the Manufacture of the Ingredient in accordance with the
                    Specifications.  The Ingredient shall be Manufactured at the
                    Approved Facility and the location thereof shall not be
                    changed without Wyeth-Ayerst's written consent, which
                    consent shall not be unreasonably withheld.

          3.1.2     For so long as the Approved Facility shall be Manufacturing
                    the Ingredient, GalaGen shall perform routine audits of the
                    Approved Facility cleaning, validation and environmental
                    monitoring programs.  GalaGen shall notify Wyeth-Ayerst in
                    the event of any adverse finding during such audit, or any
                    cross contamination issue related to the Ingredient.

     3.2  SPECIFICATIONS AMENDMENTS.  The Specifications shall be amended or
          supplemented to comply with cGMPs and to comply with any applicable
          Regulatory Authority directive and may also be amended or supplemented
          (including, without limitation, for the purpose of incorporating
          improvements) from time to time.  In the event GalaGen intends to
          amend the Specifications, Wyeth-Ayerst shall receive prompt advance
          notice of any such amendments. No such amendment shall be filed with
          any applicable Regulatory Authority or otherwise become effective
          without the prior written mutual approval of Wyeth-Ayerst and GalaGen.
          In the event that, after the Parties have initially agreed upon the
          Specifications, Wyeth-Ayerst requests that the Specifications be
          amended, GalaGen shall receive prompt advance notice of any such
          amendment for the purpose of determining what, if any, impact the
          proposed amendment would have on the Manufacture of Ingredient for
          Wyeth-Ayerst hereunder and Wyeth-Ayerst shall reimburse GalaGen for
          the actual costs incurred by GalaGen (provided that such costs are
          approved in writing by Wyeth-Ayerst prior to being incurred by
          GalaGen) because such amendment requires changes to be made in the
          processes, equipment, testing procedures, or components used to
          Manufacture the Ingredient for Wyeth-Ayerst hereunder.  Such costs may
          include, without limitation, validation of new processes, equipment
          and facilities, development of testing methods and start-up 


                                          7
<PAGE>

          costs.  Any costs incurred by GalaGen in implementing an amendment of
          the Specifications under this Section 3.2 shall not be included in
          GalaGen's Manufacturing Cost.

     3.3  QUALITY CONTROL SYSTEM.  GalaGen shall maintain and shall use its
          Commercially Reasonable Efforts to cause any permitted subcontractor
          manufacturing the Ingredient or any component thereof [**CONFIDENTIAL
          TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
          SECURITIES AND EXCHANGE COMMISSION***] to maintain a quality control
          system consistent with cGMP, as required by the Regulatory Authorities
          and applicable laws and regulations, and documentation of such quality
          control system, as amended or supplemented, shall be made available to
          Wyeth-Ayerst during inspections or audits. 

     3.4  APPROVAL FOR MANUFACTURING CHANGES; THIRD PARTY MANUFACTURING. 
          GalaGen agrees that no changes will be made to any materials,
          equipment or methods of production or testing which are specified in
          the Specifications or any Regulatory Approval by any Regulatory
          Authority for the Ingredient without Wyeth-Ayerst's prior written
          approval, which approval shall not be unreasonably withheld.  Under no
          circumstances will GalaGen contract out all or any part of the
          manufacturing of the Ingredient to a Third Party without prior written
          approval from Wyeth-Ayerst, which approval shall not be unreasonably
          withheld.

     3.5  PRODUCTION SAMPLES, BATCH RECORDS AND CERTIFICATE OF ANALYSIS. 

          3.5.1     Each Batch of the Ingredient delivered to Wyeth-Ayerst
                    hereunder will conform to the Specifications.  GalaGen shall
                    perform release testing in a manner consistent with testing
                    methods agreed upon by the Parties.  GalaGen shall provide
                    to Wyeth-Ayerst a Certificate of Analysis with each shipment
                    of the Ingredient to Wyeth-Ayerst or its designated
                    recipient stating that the Ingredient so shipped conforms to
                    the Specifications.  The Certificate of Analysis shall be in
                    a format agreed upon by the Parties.

          3.5.2     GalaGen shall retain production samples and Batch records
                    from each Batch of Ingredient for the longer of (i) five (5)
                    years after the manufacture of each such Batch of Ingredient
                    or (ii) the time period required under cGMP.  Upon request,
                    GalaGen shall provide Wyeth-Ayerst's Quality Control
                    Department with production samples of the Ingredient and/or
                    copies of completed Batch records.

          3.5.3     Master Batch process documentation will be prepared and
                    approved by GalaGen as per its normal procedures.  The
                    Parties agree that deviations from master Batch process
                    documentation may be necessary from time to time.  Such
                    deviations shall be discussed with Wyeth-Ayerst before any


                                          8
<PAGE>

                    proposed shipment of the Ingredient.  Individual Batch
                    process documentation shall be photocopied from the approval
                    master and issued for each Batch as per GalaGen's or its
                    sub-contractor's routine system.  Original Batch records
                    will be filed securely by GalaGen or its sub-contractor.  
                    GalaGen or GalaGen's sub-contractor will perform all
                    in-process control tests demanded by the approved Batch
                    process.

     3.6  BATCH FAILURE.  GalaGen agrees to notify Wyeth-Ayerst within one (1)
          working days of discovery of any Batch failure which could result in
          GalaGen's inability to meet Wyeth-Ayerst's requested delivery dates.

     3.7  NOTIFICATION OF INSPECTIONS.  Each Party agrees to notify the other
          within [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
          SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***] days of its
          receipt of notification of any inquiries, notifications, or inspection
          activity by any Regulatory Authority, governmental agency or authority
          in regard to or affecting the Ingredient.  The recipient Party shall
          provide a reasonable description to the other Party of any such
          governmental inquiries, notifications or inspections promptly (but in
          no event later than [**CONFIDENTIAL TREATMENT REQUESTED; PORTION
          OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***] days) after notification of completion of such visit or
          inquiry.  The recipient Party shall furnish to the other Party, (i)
          within [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
          SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***] days after
          receipt, any report or correspondence issued by the Regulatory
          Authority or governmental authority in connection with such visit or
          inquiry, including but not limited to, any FDA Form 483, Establishment
          Inspection Reports or warning letters and (ii) at the same time it
          provides to any Regulatory Authority or governmental authority, copies
          of any and all documents, responses or explanations relating to items
          set forth above, in each case purged only of trade secrets of the
          recipient that are unrelated to the obligations under this Agreement
          or the License Agreement or are unrelated to the Ingredient.  In the
          event such governmental agency or authority requests or requires any
          action to be taken to address any citations, the recipient agrees,
          after consultation with the other Party, to take such action as
          necessary to address such citations, and agrees to cooperate with the
          other Party with respect to any such citation and/or action taken with
          respect thereto.

     3.8  INSPECTION BY WYETH-AYERST.  GalaGen shall permit or obtain the right
          for Wyeth-Ayerst (at its own expense) to visit, during normal business
          hours and with reasonable advance notice [**CONFIDENTIAL TREATMENT
          REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
          EXCHANGE COMMISSION***] GalaGen's, or its sub-contractors'
          manufacturing facility(ies) and warehouse, and the Approved Facility,
          subject to the confidentiality provisions of this Agreement, for the
          purposes of (a) observing the 


                                          9
<PAGE>

          Manufacturing, packaging, testing and warehousing of the Ingredient
          and to inspect for compliance with cGMPs, applicable regulatory
          requirements, the requirements of any applicable Regulatory Approvals,
          and environmental monitoring, (b) solving technical or quality
          problems, (c) examining the premises, equipment, procedures and
          personnel used when producing, testing or controlling the Ingredient
          and (d) all books and records relating to (a), (b) or (c).  GalaGen
          representatives shall be entitled to accompany Wyeth-Ayerst
          representatives on any such inspection.

     3.9  ENVIRONMENTAL AND OTHER LAWS AND REGULATIONS.

          3.9.1     In carrying out its obligations under this Agreement,
                    GalaGen and/or its sub-contractor shall comply with all
                    applicable environmental, health and safety laws (current or
                    as amended or added, collectively "Laws"), and shall be
                    solely responsible for determining how to comply with same. 
                    GalaGen represents and warrants that it and/or its
                    sub-contractor(s) have the appropriate skills, personnel,
                    equipment, permits or approvals necessary to perform its
                    services under this Agreement in compliance with all
                    applicable Laws.

          3.9.2     GalaGen shall notify Wyeth-Ayerst, in writing, no later than
                    one (1) business day after the event, of any circumstances,
                    including the receipt of any notice, warning, citation,
                    finding, report or service of process, relating to
                    compliance with the Laws, or the occurrence of any release,
                    spill, upset or discharge of "Hazardous Substances" as
                    defined by the Comprehensive Environmental Response,
                    Compensation and Liability Act of 1980, as amended, which
                    relates to GalaGen's or sub-contractor's ability to
                    Manufacture or supply the Ingredient.  Wyeth-Ayerst reserves
                    the right to conduct an environmental inspection of
                    GalaGen's or its sub-contractors' facility, during normal
                    business hours and with reasonable advance notice, for the
                    purpose of determining compliance with this Section 3.9, no
                    more frequently than once per year during the term hereof
                    and under conditions of confidentiality as provided under
                    Article 10.  Upon GalaGen's request Wyeth-Ayerst shall share
                    the results of any environmental inspection with GalaGen. 
                    Such inspection, if it occurs, does not relieve GalaGen of
                    its sole obligation to comply with the Laws and does not
                    constitute a waiver of any right otherwise available to
                    Wyeth-Ayerst.

4.   DELIVERY

     4.1  DELIVERY SITES AND RISK OF LOSS.  Delivery of each order of Ingredient
          shall be D.D.P. (Incoterms, 1990) to those sites  specified by
          Wyeth-Ayerst from time to time via a carrier that is mutually
          agreeable to the Parties.  GalaGen shall pay for freight and shipping
          charges, per D.D.P., to all designated sites.  Title to and risk of
          loss of the Ingredient shall pass to Wyeth-Ayerst at the time of
          delivery by GalaGen 


                                          10
<PAGE>

          to Wyeth-Ayerst.  Wyeth-Ayerst agrees to reimburse GalaGen for
          [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***] of the delivery costs
          incurred by GalaGen in accordance with this Section 4.1.  GalaGen
          shall promptly invoice Wyeth-Ayerst for all Ingredient tendered, which
          invoice shall set forth the purchase price payable by Wyeth-Ayerst
          pursuant to Section 6.1 hereof and Wyeth-Ayerst's share of the
          delivery costs pursuant to this Section 4.1.  Delivery costs incurred
          by GalaGen under this Section 4.1 shall not be included as part of
          GalaGen's Manufacturing Cost.

     4.2  SCHEDULING OF DELIVERY.  Subject to the provisions of Section 2.3
          hereof, GalaGen shall schedule the timely Manufacture and shipment of
          the Ingredient pursuant to Wyeth-Ayerst's firm purchase orders.

     4.3  DELAY AND FAILURE TO SUPPLY.  Should GalaGen, at any time during the
          course of this Agreement, have reason to believe that it will be
          unable to meet Wyeth-Ayerst's requested delivery dates, GalaGen will
          promptly notify Wyeth-Ayerst in writing setting forth the reasons for
          the delay.  Such notification will not be deemed a waiver of GalaGen's
          obligation set forth in Section 4.3(b).  In connection therewith: 

          (a)  If at any time GalaGen experiences a shortage of Ingredient
               supply and the available supplies of Ingredient are not
               sufficient to satisfy all of Wyeth-Ayerst's requirements for the
               Ingredient, GalaGen shall allocate its available worldwide
               supplies (including inventory in excess of customary supplies)
               first to Wyeth-Ayerst based on Wyeth-Ayerst's binding forecasts
               and any excess supplies of Ingredient may thereafter be allocated
               among its own requirements and those of its licensees and
               distributors.


          (b)  If at any time GalaGen is of the opinion that it may not be able
               to meet future binding orders from Wyeth-Ayerst for Ingredient
               (including, but not limited to a situation where as a result of
               any intellectual property litigation GalaGen chooses not to
               supply Ingredient) it shall notify Wyeth-Ayerst in writing, and
               the Parties shall in good faith cooperate and endeavor to make
               appropriate arrangements for a continuous and adequate supply of
               Ingredient from GalaGen to Wyeth-Ayerst.

     4.4  APPOINTMENT OF WYETH-AYERST AS MANUFACTURER. 

          4.4.1     Subject to terms and provisions of this Agreement,
                    including, without limitation, GalaGen's right to
                    manufacture the Ingredient for supply to Wyeth-Ayerst,
                    GalaGen hereby grants to Wyeth-Ayerst a non-exclusive,
                    perpetual, world-wide, royalty-free license to manufacture
                    the Ingredient for use by Wyeth-Ayerst in accordance with
                    the provisions of the License Agreement.  Consistent with
                    GalaGen's obligations under Section 2.3.4 if GalaGen is
                    unable to supply at least [**CONFIDENTIAL TREATMENT


                                          11
<PAGE>

                    REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
                    SECURITIES AND EXCHANGE COMMISSION***] of the quantities of
                    Ingredient ordered by Wyeth-Ayerst in any two (2)
                    consecutive Calendar Quarters, based on Wyeth-Ayerst's good
                    faith estimates of its future requirements, Wyeth-Ayerst
                    shall be relieved of its obligation to purchase that portion
                    of its requirements of Ingredient from GalaGen that GalaGen
                    is unable to supply, until such inability to supply has
                    ceased and GalaGen may resume the manufacture of
                    Wyeth-Ayerst's requirements of the Ingredient pursuant to
                    Section 4.5 hereof, and Wyeth-Ayerst shall have the right,
                    under the license granted in this Section 4.4.1, to
                    manufacture, or have manufactured, such portion of the
                    Ingredient that GalaGen is unable to supply.  GalaGen has
                    the right to approve, in advance, any Third Party
                    manufacturer utilized by Wyeth-Ayerst pursuant to this
                    Section 4.4.1, PROVIDED, HOWEVER, that  GalaGen's approval
                    shall not be unreasonably withheld and shall be communicated
                    to Wyeth-Ayerst within ten (10) days of notice from
                    Wyeth-Ayerst to GalaGen.  If the quantity of Ingredient that
                    GalaGen is unable to supply is so limited that it would be
                    an excessive financial burden on Wyeth-Ayerst to
                    manufacture, or have manufactured, such limited quantity,
                    the Parties shall meet, after GalaGen is notified by
                    Wyeth-Ayerst of such circumstance, and in good faith seek to
                    reasonably resolve the matter.  For purposes of this Section
                    4.4.1, the provision of such Ingredient to Wyeth-Ayerst by
                    [***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]
                    or any permitted subcontractor of GalaGen or
                    [***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]
                    shall be deemed for purposes of determining whether
                    Wyeth-Ayerst may exercise its right to manufacture
                    Ingredient hereunder to be the provision of such Ingredient
                    by GalaGen.  Notwithstanding any other provision hereof, if
                    GalaGen's failure to supply Ingredient is attributable
                    solely to its inability to [**CONFIDENTIAL TREATMENT
                    REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
                    SECURITIES AND EXCHANGE COMMISSION***] otherwise complete
                    the manufacture of Ingredient and its not attributable, in
                    whole or in part, to its inability to [**CONFIDENTIAL
                    TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH
                    THE SECURITIES AND EXCHANGE COMMISSION***], Wyeth-Ayerst
                    shall not [**CONFIDENTIAL TREATMENT REQUESTED; PORTION
                    OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                    COMMISSION***] and GalaGen shall continue to have the right
                    to be Wyeth-Ayerst's supplier of [**CONFIDENTIAL TREATMENT
                    REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
                    SECURITIES AND EXCHANGE COMMISSION***] pursuant to the terms
                    and conditions of this 


                                          12
<PAGE>

                    Agreement, including, without limitation, the purchase price
                    provisions of Section 6.1 (PROVIDED, HOWEVER, that in such
                    event the calculation of GalaGen's Manufacturing Cost shall
                    be based only on [**CONFIDENTIAL TREATMENT REQUESTED;
                    PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
                    EXCHANGE COMMISSION***]).  Notwithstanding the foregoing, in
                    the event GalaGen is continuing to supply Ingredient to
                    Wyeth-Ayerst as provided herein, Wyeth-Ayerst shall have the
                    right to [**CONFIDENTIAL TREATMENT REQUESTED; PORTION
                    OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                    COMMISSION***] if, for two successive calendar quarters,
                    GalaGen's inventories of [**CONFIDENTIAL TREATMENT
                    REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
                    SECURITIES AND EXCHANGE COMMISSION***] fall below the amount
                    of [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED
                    FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
                    COMMISSION***] needed to manufacture Wyeth-Ayerst's
                    forecasted needs (as provided in its most recent binding
                    forecasts pursuant to Section 2.3) of Ingredient.

          4.4.2     In the event that GalaGen is unable to supply Ingredient as
                    provided above, GalaGen shall be responsible for all costs
                    to qualify Wyeth-Ayerst, or its designated manufacturer, as
                    a manufacturer of the Ingredient.  Such costs include, but
                    are not limited to, [**CONFIDENTIAL TREATMENT REQUESTED;
                    PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
                    EXCHANGE COMMISSION***]. 

     4.5  RESUMPTION OF MANUFACTURING BY GALAGEN.  At such time as GalaGen
          reasonably demonstrates to Wyeth-Ayerst that it is able to again
          supply all of Wyeth-Ayerst's requirements on an ongoing basis,
          Wyeth-Ayerst shall be permitted to continue to manufacture, or have
          manufactured that amount of Ingredient it had been manufacturing
          pursuant to Section 4.4 hereof, for such period of time thereafter as
          is reasonably necessary for Wyeth-Ayerst and/or any of its Affiliates
          and/or any Third Party manufacturer to fully amortize all expenses
          that may have been reasonably incurred under such manufacturing
          program, using generally accepted accounting principles normally used
          by Wyeth-Ayerst in keeping its own books and records.  Thereafter,
          Wyeth-Ayerst shall purchase its requirements of Ingredient from
          GalaGen in accordance with the terms of this Agreement, PROVIDED,
          HOWEVER, that Wyeth-Ayerst shall be permitted to continue
          manufacturing or purchasing from such Third Party(ies) Ingredient in
          amounts equal to the greater of (i) the amount of Wyeth's requirements
          of Ingredient that GalaGen is currently unable to supply or (ii)
          [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***] of Wyeth's
          requirements of Ingredient that Wyeth-Ayerst has manufactured or has
          purchased from Third Parties [**CONFIDENTIAL 




                                          13
<PAGE>

          TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
          SECURITIES AND EXCHANGE COMMISSION***].

     4.6  DISCLOSURE OF GALAGEN KNOW-HOW; TECHNICAL ASSISTANCE.  If, pursuant to
          Sections 4.4 or 4.5 hereof, Wyeth-Ayerst elects to commence
          manufacturing the Ingredient, either itself or through a Third Party,
          GalaGen shall promptly disclose to Wyeth-Ayerst all of its Know-How
          that is necessary to enable Wyeth-Ayerst to so manufacture the
          Ingredient to the extent permitted hereunder.  Additionally, GalaGen
          shall, at no cost to Wyeth-Ayerst, provide Wyeth-Ayerst with
          reasonable technical assistance that may be necessary or useful for
          Wyeth-Ayerst to utilize such Know-How and to commence the manufacture
          of the Ingredient to the extent permitted hereunder.  If GalaGen
          discloses Know-How to Wyeth-Ayerst for the purpose of enabling
          Wyeth-Ayerst or its designee to manufacture Ingredient, Wyeth-Ayerst
          agrees to use such Know-How only for such purpose and such Know-How
          shall be treated as Confidential Information in accordance with
          Article 10 hereof.

     4.7  QUALITY ASSURANCE.

          4.7.1     Prior to the shipment of Ingredient to Wyeth-Ayerst, GalaGen
                    shall test representative samples of each of the lot(s) to
                    be shipped in accordance with the methods of analysis
                    defined in the Specifications.  GalaGen shall provide
                    Wyeth-Ayerst with a certificate of analysis for each lot of
                    Ingredient shipped to Wyeth-Ayerst.

          4.7.2     Wyeth-Ayerst shall have the right to test Ingredient to
                    verify compliance with Specifications and applicable
                    Regulatory Approvals and GalaGen shall supply Wyeth-Ayerst
                    with its testing procedures.  Wyeth-Ayerst may, by written
                    notice provided to GalaGen within [**CONFIDENTIAL TREATMENT
                    REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
                    SECURITIES AND EXCHANGE COMMISSION***] of Wyeth-Ayerst's
                    receipt of a shipment of Ingredient, reject all or part of
                    such shipment of Ingredient if, based upon the testing of
                    such Ingredient conducted under this Section 4.7, such
                    Ingredient does not comply with the Specifications.  If
                    Wyeth-Ayerst fails to notify GalaGen, within such
                    [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]
                    period, that it is rejecting such Ingredient, Wyeth-Ayerst
                    shall be deemed to have accepted such Ingredient.

          4.7.3     If GalaGen, after good faith consultation with Wyeth-Ayerst,
                    disputes any finding by Wyeth-Ayerst that the Ingredient
                    does not comply with the Specifications, samples of such
                    Ingredient shall be forwarded to a Third Party jointly
                    selected by Wyeth-Ayerst and GalaGen for analysis, which
                    analysis shall be performed in compliance with applicable
                    regulatory 


                                          14
<PAGE>

                    requirements.  The findings of such Third Party regarding
                    whether the Ingredient complies with the Specifications and
                    the applicable Regulatory Approvals shall be binding upon
                    the Parties for purposes of this Section 4.7.  The cost of
                    such analysis by such Third Party shall be borne by the
                    Party whose findings differed from those generated by such
                    Third Party.

          4.7.4     If, as determined in accordance with this Section 4.7, a
                    shipment of Ingredient does not conform to the
                    Specifications, GalaGen shall replace such shipment free of
                    charge with a substitute shipment which meets such
                    Specifications according to the following time frame:  If
                    the Ingredient is in inventory then conforming Ingredient
                    will be shipped so as to arrive as soon as practicable.  If
                    the Ingredient is not in inventory, GalaGen will take all
                    reasonable steps to ensure expeditious Manufacture of
                    conforming Ingredient which will be shipped on the next
                    shipping day after completion of Manufacture so as to arrive
                    as soon as possible thereafter.  In the event that testing
                    at Wyeth-Ayerst indicates that Ingredient does not conform
                    with Specifications: (i) Wyeth-Ayerst shall immediately
                    notify GalaGen; (ii) Wyeth-Ayerst and GalaGen shall mutually
                    agree on an investigation program to determine the cause of
                    the discrepancy and the outcome of this investigation shall
                    be used to determine disposition of the Batch; (iii) where
                    appropriate, given the timetable for the agreed
                    investigation program, GalaGen shall take all reasonable
                    steps to ensure expeditious Manufacture and shipment of
                    conforming Ingredient; and (iv) shipment of such replacement
                    Ingredient shall take place the next shipping day following
                    completion of analytical work to demonstrate conformance
                    with Specifications. Shipment shall be by the quickest
                    agreed route.  At GalaGen's expense and at Wyeth-Ayerst's
                    sole option: (i) the non-conforming shipment shall be
                    returned to GalaGen; or (ii) disposed of by Wyeth-Ayerst,
                    upon final determination in accordance with this Section 4.7
                    that it does not meet the Specifications.


5.   RECALLS

     5.1  NOTIFICATION AND RECALL.

          5.1.1     In the event that any governmental agency or authority
                    requests a recall or takes similar action in connection with
                    the Ingredient or with the Product because of or in
                    connection with the presence of the Ingredient therein, or
                    in the event either Party determines an event, incident or
                    circumstance has occurred which may result in the need for a
                    recall or market withdrawal, the Party notified of or
                    calling such recall or similar action shall, within
                    [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND 


                                          15
<PAGE>

                    EXCHANGE COMMISSION***], advise the other Party by telephone
                    or facsimile.

          5.1.2     Following notification of a recall, within [**CONFIDENTIAL
                    TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH
                    THE SECURITIES AND EXCHANGE COMMISSION***], the Parties'
                    representatives from business, medical, regulatory, quality
                    assurance and legal functions (and any others deemed
                    necessary by a Party) (the "Recall Team") shall discuss
                    whether or not to conduct a recall, and, if so, the timing
                    of the recall, the breadth, extent and level of customer to
                    which the recall shall reach, what strategies and
                    notifications should be used, the responsibility for the
                    recall expenses, etc.  In the event the Recall Team cannot
                    agree on such decisions, the issues shall be resolved by
                    [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
                    SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]. 
                    In the event such [**CONFIDENTIAL TREATMENT REQUESTED;
                    PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
                    EXCHANGE COMMISSION***] cannot agree, Wyeth-Ayerst shall
                    have the final authority to decide whether a recall of the
                    Product shall be made.  

          5.2  RECALL EXPENSES.  Wyeth-Ayerst shall bear the expenses of any
               recall resulting from breach of its obligations hereunder or
               under the License Agreement, from negligent manufacturing,
               packaging, storage, shipment, marketing, distribution or sale of
               the Product by Wyeth-Ayerst or from any manufacturing defect in a
               Product manufactured or sold by Wyeth-Ayerst which manufacturing
               defect is not a defect in the Ingredient Manufactured or supplied
               by or on behalf of GalaGen or its permitted subcontractors
               hereunder.  GalaGen shall bear the expenses of any recall
               resulting from a breach of its obligations hereunder or under the
               License Agreement, from negligent Manufacturing, packaging,
               storage, shipment, marketing, distribution or sale of the
               Ingredient by GalaGen or from any Manufacturing defect in the
               Ingredient.  The Parties shall equally divide the costs of any
               recall resulting from a latent defect (for example, side effects
               of the Ingredient not known by the Parties as of the Effective
               Date).  For the purposes of this Agreement, expenses of recall
               include, without limitation, the expenses incurred by the
               affected Party for the investigation, notification, regulatory
               reporting and/or destruction or return of the recalled Ingredient
               or Product, the sum paid by Wyeth-Ayerst to GalaGen for the
               Ingredients recalled, Wyeth-Ayerst's costs relating to the
               manufacturing, testing, packaging, shipping and supplying the
               Products recalled.


                                          16
<PAGE>

6.   CONSIDERATION

     6.1  PRICE. [***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
          SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]

     6.2  METHOD OF PAYMENT.  GalaGen will invoice Wyeth-Ayerst in United States
          Dollars for each and every shipment of Ingredient accepted by
          Wyeth-Ayerst.  Each such invoice shall be accompanied by a statement
          specifying the amount of Ingredient delivered to Wyeth-Ayerst, the
          total  Manufacturing Cost incurred in manufacturing such Ingredient,
          and an itemization by category of the cost for each element included
          within the  Manufacturing Cost.  Payment for all such quantities so
          shipped shall be made in United States dollars by check or bank
          transfer within [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED
          FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***] of
          the date the invoice is received by Wyeth-Ayerst.

     6.3  TAXES.  GalaGen and Wyeth-Ayerst agree to cooperate reasonably with
          each other in connection with the tax (including value-added tax) or
          duty-free importation and/or exportation of the Ingredient, whenever
          such tax or duty-free treatment is appropriate under the applicable
          tax and customs laws and regulations.

     6.4  RECORD KEEPING.  GalaGen shall keep accurate books and accounts of
          record in connection with its Manufacture of the Ingredient in
          sufficient detail to permit accurate determination of all figures
          necessary for verification of Manufacturing Cost incurred by GalaGen
          in the Manufacture of the Ingredient hereunder.  GalaGen shall
          maintain such records for a period of [**CONFIDENTIAL TREATMENT
          REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
          EXCHANGE COMMISSION***] after the end of the year in which they were
          generated.

     6.5  AUDIT BY WYETH-AYERST.  Wyeth-Ayerst, through an independent certified
          public accountant reasonably acceptable to GalaGen, shall have the
          right, at its own expense, to access the books and records of GalaGen
          for the sole purpose of verifying the statements furnished by GalaGen
          pursuant to Section 6.2.  Such access shall be conducted after
          reasonable prior written notice to GalaGen and during ordinary
          business hours and shall not be more frequent than twice per calendar
          year.  Wyeth-Ayerst agrees to keep in strict confidence all
          information learned in the course of such audit, except when it is
          necessary to reveal such information in order to enforce its rights
          under this Agreement.  Wyeth-Ayerst's right to have such records
          examined shall survive termination or expiration of this Agreement. 
          In the event such audit reveals an overpayment GalaGen shall promptly
          refund to Wyeth-Ayerst the amount of such overpayment.  In the event
          such audit reveals an overpayment of [**CONFIDENTIAL TREATMENT
          REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE 


                                          17
<PAGE>

          SECURITIES AND EXCHANGE COMMISSION***] or more of the amount actually
          due, GalaGen shall also promptly reimburse Wyeth-Ayerst for the costs
          of such audit.

     6.6  [***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***]
          

7.   REPRESENTATIONS AND WARRANTIES.

     7.1  REPRESENTATIONS AND WARRANTIES OF EACH PARTY.  Each of GalaGen and
          Wyeth-Ayerst hereby represents, warrants and covenants to the other
          Party hereto as follows:

          (a)  it is a corporation or entity duly organized and validly existing
               under the laws of the state or other jurisdiction of
               incorporation or formation;

          (b)  the execution, delivery and performance of this Agreement by such
               Party has been duly authorized by all requisite corporate action
               and do not require any shareholder action or approval;
 
          (c)  it has the power and authority to execute and deliver this
               Agreement and to perform its obligations hereunder;

          (d)  the execution, delivery and performance by such Party of this
               Agreement and its compliance with the terms and provisions hereof
               does not and will not conflict with or result in a breach of any
               of the terms and provisions of or constitute a default under (i)
               a loan agreement, guaranty, financing agreement, agreement
               affecting a product or other agreement or instrument binding or
               affecting it or its property; (ii) the provisions of its charter
               or operative documents or bylaws; or (iii) any order, writ,
               injunction or decree of any court or governmental authority
               entered against it or by which any of its property is bound; and

          (e)  it shall comply with all applicable material laws and regulations
               relating to its activities under this Agreement.


     7.2  REPRESENTATIONS AND WARRANTIES OF GALAGEN.  In addition to the
          representations and warranties made by GalaGen under Section 7.1
          above, GalaGen hereby further represents and warrants to Wyeth-Ayerst
          that:

          (a)  at the time of delivery of the Ingredient to the specified point
               of delivery, the Ingredient shall (i) have been Manufactured,
               stored and shipped in accordance with cGMPs, as applicable, and
               all other applicable laws, rules, 


                                          18
<PAGE>

               regulations or requirements in effect at the time of Manufacture
               in the country of Manufacture (for example, in accordance with
               the procedures described in the applicable Regulatory Approval);
               (ii) conform to the Specifications; (iii) meet the provisions of
               the Specifications; (iv) shall not be adulterated or misbranded
               as provided for under any applicable law, order or regulation in
               effect in the country of Manufacture and the country in which the
               Product is being sold pursuant to the License Agreement; (v)
               shall have been Manufactured and have shelf-life in accordance
               with the provisions of Section 2.6; and (vi) have been shipped in
               accordance with approved procedures agreed between Wyeth-Ayerst
               and GalaGen;

          (b)  it shall have good and marketable title to all Ingredient
               delivered to Wyeth-Ayerst;

          (c)  to the best of its knowledge the Manufacture, use and sale of the
               Ingredient supplied to Wyeth-Ayerst under this Agreement do not
               infringe any intellectual property rights of any Third Party or
               in any country where such Ingredient or Product is manufactured
               or sold.

     7.3  NO INCONSISTENT AGREEMENTS.  Except as otherwise provided in Sections
          11.3 and 11.4  of the License Agreements, neither Party has in effect
          and after the Effective Date neither Party shall enter into any oral
          or written agreement or arrangement that would be inconsistent with
          its obligations under this Agreement.
     
     7.4  REPRESENTATION BY LEGAL COUNSEL.  Each Party hereto represents that it
          has been represented by legal counsel in connection with this
          Agreement and acknowledges that it has participated in the drafting
          hereof.  In interpreting and applying the terms and provisions of this
          Agreement, the Parties agree that no presumption shall exist or be
          implied against the Party which drafted such terms and provisions.


8.   INDEMNIFICATION AND INSURANCE

     8.1  INDEMNIFICATION BY WYETH-AYERST.  Wyeth-Ayerst shall indemnify, defend
          and hold harmless GalaGen and its Affiliates, and each of its and
          their respective employees, officers, directors and agents (each, a
          "GalaGen Indemnified Party") from and against any and all liability,
          loss, damage, cost, and expense (including reasonable attorneys' fees)
          (collectively, a "Liability") which the GalaGen Indemnified Party may
          incur, suffer or be required to pay resulting from or arising in
          connection with (i) the breach by Wyeth-Ayerst of any covenant,
          representation or warranty contained in this Agreement, (ii) the
          manufacture, promotion, distribution, use, testing, marketing, sale or
          other disposition of Products by Wyeth-Ayerst, its Affiliates or
          sublicensees, or (iii) the successful enforcement by a GalaGen
          Indemnified Party of its rights under this Section 8.1. 
          Notwithstanding 


                                          19
<PAGE>

          the foregoing, Wyeth-Ayerst shall have no obligation under this
          Agreement to indemnify, defend or hold harmless any GalaGen
          Indemnified Party with respect to claims, demands, costs or judgments
          which result from willful misconduct or negligent acts or omissions of
          GalaGen, its Affiliates, or any of their respective employees,
          officers, directors or agents.

     8.2  INDEMNIFICATION BY GALAGEN.  GalaGen shall indemnify, defend and hold
          harmless Wyeth-Ayerst and its Affiliates, and each of its and their
          respective employees, officers, directors and agents (each, a
          "Wyeth-Ayerst Indemnified Party") from and against any Liability which
          the Wyeth-Ayerst Indemnified Party may incur, suffer or be required to
          pay resulting from or arising in connection with (i) the breach by
          GalaGen of any covenant, representation or warranty contained in this
          Agreement; (ii) the discovery, development, manufacture, promotion,
          sale or use of the Ingredient by GalaGen, its Affiliates or their
          subcontractors; or (iii) the successful enforcement by a Wyeth-Ayerst
          Indemnified Party of its rights under this Section 8.2. 
          Notwithstanding the foregoing, GalaGen shall have no obligation under
          this Agreement to indemnify, defend, or hold harmless any Wyeth-Ayerst
          Indemnified Party with respect to claims, demands, costs or judgments
          which result from willful misconduct or negligent acts or omissions of
          Wyeth-Ayerst, its Affiliates, or any of their respective employees,
          officers, directors or agents.

     8.3  CONDITIONS TO INDEMNIFICATION.  The obligations of the indemnifying
          Party under Sections 8.1 and 8.2 are conditioned upon the delivery of
          written notice to the indemnifying Party of any potential Liability
          promptly after the indemnified Party becomes aware of such potential
          Liability.  The indemnifying Party shall have the right to assume the
          defense of any suit or claim related to the Liability if it has
          assumed responsibility for the suit or claim in writing; however, if
          in the reasonable judgment of the indemnified Party, such suit or
          claim involves an issue or matter which could have a materially
          adverse effect on the business operations or assets of the indemnified
          Party, the indemnified Party may waive its rights to indemnity under
          this Agreement and control the defense or settlement thereof, but in
          no event shall any such waiver be construed as a waiver of any
          indemnification rights such Party may have at law or in equity.  If
          the indemnifying Party defends the suit or claim, the indemnified
          Party may participate in (but not control) the defense thereof at its
          sole cost and expense.

     8.4  SETTLEMENTS.  Neither Party may settle a claim or action related to a
          Liability without the consent of the other Party, if such settlement
          would impose any monetary obligation on the other Party or require the
          other Party to submit to an injunction or otherwise limit the other
          Party's rights under this Agreement.  Any payment made by a Party to
          settle any such claim or action shall be at its own cost and expense.


                                          20
<PAGE>

     8.5  INSURANCE.   Each Party further agrees to use reasonable commercial
          efforts to obtain and maintain, during the term of this Agreement,
          Comprehensive General Liability Insurance, including Products
          Liability Insurance, with reputable and financially secure insurance
          carriers to cover its indemnification obligations under Sections 8.1
          or 8.2, as applicable, or, in the case of Wyeth-Ayerst,
          self-insurance, in each case with limits of not less than
          [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***].


9.   TERM AND TERMINATION.

     9.1  TERM. This Agreement shall be effective as of the Effective Date and
          unless terminated earlier by mutual written agreement of the Parties
          or pursuant to Sections 9.2 or 9.3 below, the Term of this Agreement
          shall continue in effect until the later of (i) the expiration of the
          License Agreement or (ii) fifteen (15) years after the First
          Commercial Sale of a Product (the "Initial Term").  The term of this
          Agreement may be extended [**CONFIDENTIAL TREATMENT REQUESTED; PORTION
          OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
          COMMISSION***] (each a "Renewal Term") at Wyeth-Ayerst's option by
          providing GalaGen with written notice of such extension at least three
          (3) months prior to the expiration of the Initial Term or any Renewal
          Term, as applicable.  Notwithstanding the foregoing, in the event that
          GalaGen is able to reasonably demonstrate that the continued
          manufacture and supply to Wyeth-Ayerst of Ingredient during any such
          Renewal Term would not be commercially feasible for GalaGen, then
          GalaGen may elect not to so extend the term of this Agreement,
          PROVIDED, HOWEVER, that GalaGen must notify Wyeth-Ayerst, in writing,
          of such election no later than thirty (30) days after receiving from
          Wyeth-Ayerst notice that Wyeth-Ayerst has elected to extend the term, 
          which notice shall set forth those facts and be accompanied by that
          supporting documentation that is necessary to demonstrate that the
          continued Manufacture and supply of Ingredient to Wyeth-Ayerst would
          not be commercially feasible to GalaGen and provided further that
          after providing such notice to Wyeth-Ayerst (a) Wyeth-Ayerst may
          exercise its right, under the license granted in the first sentence of
          Section 4.4.1, to manufacture, either itself or through a Third Party,
          Ingredient and (b) GalaGen shall (i) in accordance with Section 4.6
          hereof, promptly disclose to Wyeth-Ayerst all Know-How and information
          necessary for Wyeth-Ayerst, its Affiliates or subcontractors to
          manufacture Ingredient, (ii) provide reasonable technical assistance,
          at GalaGen's expense, that may be necessary for Wyeth-Ayerst, its
          Affiliates or subcontractors to manufacture the Ingredient and (iii)
          continue to Manufacture and supply Ingredient to Wyeth-Ayerst, under
          the terms of this Agreement, until the earlier of (x) the time that
          Wyeth-Ayerst, its Affiliates or subcontractors are producing
          Wyeth-Ayerst's requirements of the Ingredient or (y) [**CONFIDENTIAL
          TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY 


                                          21
<PAGE>

          WITH THE SECURITIES AND EXCHANGE COMMISSION***] after the expiration
          of the applicable Initial Term or Renewal Term of this Agreement.
          
     9.2  TERMINATION FOR CAUSE.   This Agreement may be terminated on at least
          thirty (30) days prior written notice by either Party at any time
          during the Term of this Agreement:

          (a)  for material breach by the other Party, which breach remains
               uncured for [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED
               FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***
               in the case of nonpayment of any amount due and [**CONFIDENTIAL
               TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
               SECURITIES AND EXCHANGE COMMISSION***] for all other breaches,
               each measured from the date written notice of such breach is
               given to the breaching Party, or, if such breach is not
               susceptible of cure within such [**CONFIDENTIAL TREATMENT
               REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES
               AND EXCHANGE COMMISSION***] period and the breaching Party uses
               diligent good faith efforts to cure such breach, for
               [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
               SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***] after
               written notice to the breaching Party; or

          (b)  upon the filing or institution of bankruptcy, reorganization,
               liquidation or receivership proceedings, or upon an assignment of
               a substantial portion of the assets for the benefit of creditors
               by the other Party, or in the event a receiver or custodian is
               appointed for such Party's business, or if a substantial portion
               of such Party's business is subject to attachment or similar
               process; PROVIDED, HOWEVER, that in the case of any involuntary
               bankruptcy proceeding such right to terminate shall only become
               effective if the proceeding is not dismissed within
               [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
               SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***] after
               the filing thereof.  In the event Wyeth-Ayerst terminates the
               License Agreement under section 9.2.1(b) thereof or this
               Agreement is otherwise terminated under this Section 9.2(b), the
               Parties agree that Wyeth-Ayerst, as a licensee of rights to
               intellectual property under this Agreement, shall retain and may
               fully exercise all of its rights and elections under Title 11,
               including as set forth in Section 9.6 hereof.

     9.3  EFFECT OF TERMINATION OF LICENSE AGREEMENT.

        9.3.1  In the event Wyeth-Ayerst terminates the License Agreement under
               Section 9.2.1(a) thereof, this Agreement, at Wyeth-Ayerst's sole
               option, 


                                          22
<PAGE>

                    may either (i) be terminated by Wyeth-Ayerst or (ii) remain
                    in full force and effect.  If Wyeth-Ayerst elects to
                    terminate this Agreement under Section 9.2(a) hereof, 
                    Wyeth-Ayerst shall have the right, pursuant to the license
                    granted to it in the first sentence of Section 4.4.1 hereof
                    to manufacture the Ingredient for use in Products and
                    GalaGen shall,  promptly after receipt from Wyeth-Ayerst of
                    notice that Wyeth-Ayerst is terminating this Agreement in
                    accordance with Section 9.2(a) hereof (i) in accordance with
                    Section 4.6 hereof, disclose to Wyeth-Ayerst all Know-How
                    and information in GalaGen's possession which is or may be
                    necessary to enable Wyeth-Ayerst, its Affiliates or
                    subcontractors to manufacture the Ingredient and (ii)
                    provide reasonable technical assistance, at GalaGen's
                    expense, that may be necessary for Wyeth-Ayerst, its
                    Affiliates or subcontractors to manufacture the Ingredient.

          9.3.2     In the event that GalaGen terminates the License Agreement
                    under Section 9.2.1(a) thereof, this Agreement shall
                    automatically be terminated.

          9.3.3     If Wyeth-Ayerst terminates the License Agreement in its
                    entirety under Section 9.3 thereof, this Agreement shall
                    automatically be terminated

     9.4  GENERAL CONDITIONS OF EXPIRATION AND TERMINATION.

          9.4.1     The provisions of Articles 5, 8 and 10 and Sections 3.5.2,
                    3.5.3, 4.4.1, 4.6 4.7.2, 4.7.3, 6.4, 6.5, 7.2, 9.6, 11.6 and
                    11.7 shall survive termination or expiration of this
                    Agreement.

          9.4.2     Termination or expiration of this Agreement shall not
                    operate to deprive either Party of any rights or remedies
                    either at law or in equity or to relieve either Party of any
                    of its obligations incurred prior to the effective date of
                    such termination or expiration.

     9.5  NO LIMIT ON REMEDIES.  Nothing herein shall exclude or limit any
          remedies or entitlements whatsoever which the law confers to either
          Party in the event of a breach of contractual obligations by the other
          Party.

     9.6  INSOLVENCY.  
          
          9.6.1     EFFECT ON LICENSES.  All rights and licenses granted under
                    or pursuant to this Agreement by GalaGen to Wyeth-Ayerst
                    are, for all purposes of Section 365(n) of Title 11 of the
                    United States Code ("Title 11"), licenses of rights to
                    "intellectual property" as defined in Title 11.  GalaGen
                    agrees that Wyeth-Ayerst, as licensee of such rights under
                    this Agreement shall retain and may fully exercise all of
                    its rights and elections under Title 11.  GalaGen agrees
                    during the Term of this Agreement to create and maintain
                    current copies or, if not amenable to copying, detailed
                    descriptions or 


                                          23
<PAGE>

                    other appropriate embodiments, to the extent feasible, of
                    all such intellectual property.  If a case is commenced by
                    or against GalaGen under Title 11, GalaGen (in any capacity,
                    including debtor-in-possession) and its successors and
                    assigns (including, without limitation, a Title 11 Trustee)
                    shall,
     
                         (i)  as Wyeth-Ayerst may elect in a written request,
                              immediately upon such request:

                                   (A)  perform all of the obligations provided
                                        in this Agreement to be performed by
                                        GalaGen including, where applicable and
                                        without limitation, providing to
                                        Wyeth-Ayerst portions of such
                                        intellectual property (including
                                        embodiments thereof) held by GalaGen and
                                        such successors and assigns or otherwise
                                        available to them; or 

                                   (B)  provide to Wyeth-Ayerst all such
                                        intellectual property (including all
                                        embodiments thereof) held by GalaGen and
                                        such successors and assigns or otherwise
                                        available to them; and

                         (ii) not interfere with the rights of Wyeth-Ayerst
                              under this Agreement, or any agreement
                              supplemental hereto, to such intellectual property
                              (including such embodiments), including any right
                              to obtain such intellectual property (or such
                              embodiments) from another entity.

          9.6.2     RIGHTS TO INTELLECTUAL PROPERTY.  If a Title 11 case is
                    commenced by or against GalaGen, and this Agreement is
                    rejected as provided in Title 11, and Wyeth-Ayerst elects to
                    retain its rights hereunder as provided in Title 11, then
                    GalaGen (in any capacity, including debtor-in-possession)
                    and its successors and assigns (including, without
                    limitation, a Title 11 Trustee) shall provide to
                    Wyeth-Ayerst all such intellectual property (including all
                    embodiments thereof) held by GalaGen and such successors and
                    assigns, or otherwise available to them, immediately upon
                    Wyeth-Ayerst's written request.  Whenever GalaGen or any of
                    its successors or assigns provides to Wyeth-Ayerst any of
                    the intellectual property licensed hereunder (or any
                    embodiment thereof) pursuant to this Section 9.6,
                    Wyeth-Ayerst shall have the right to perform the obligations
                    of GalaGen hereunder with respect to such intellectual
                    property, but neither such provision nor such performance by
                    Wyeth-Ayerst shall release GalaGen from any such obligation
                    or liability for failing to perform it.


                                          24
<PAGE>

          9.6.3     WYETH-AYERST'S RIGHTS.  All rights, powers and remedies of
                    Wyeth-Ayerst provided herein are in addition to and not in
                    substitution for any and all other rights, powers and
                    remedies now or hereafter existing at law or in equity
                    (including, without limitation, Title 11) in the event of
                    the commencement of a Title 11 case by or against GalaGen. 
                    Wyeth-Ayerst, in addition to the rights, power and remedies
                    expressly provided herein, shall be entitled to exercise all
                    other such rights and powers and resort to all other such
                    remedies as may now or hereafter exist at law or in equity
                    (including, without limitation, Title 11) in such event. 
                    The Parties agree that they intend the foregoing
                    Wyeth-Ayerst rights to extend to the maximum extent
                    permitted by law, including, without limitation, for
                    purposes of Title 11:

                         (i)  the right of access to any intellectual property
                              (including all embodiments thereof) of GalaGen, or
                              any Third Party with whom GalaGen contracts to
                              perform an obligation of GalaGen under this
                              Agreement, and, in the case of the Third Party,
                              which is necessary for the development,
                              registration, Manufacture and marketing of the
                              Ingredient and/or Products; and 

                         (ii) the right to contract directly with any Third
                              Party described in (i) to complete the contracted
                              work.

10.  CONFIDENTIALITY.

     10.1 NONDISCLOSURE OBLIGATION.  Each of GalaGen and Wyeth-Ayerst shall use
          only in accordance with this Agreement and shall not disclose to any
          Third Party any information received by it from the other Party in
          connection with this Agreement (the "Information"), without the prior
          written consent of the other Party.  The foregoing obligations shall
          survive the expiration or earlier termination of this Agreement
          [**CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY
          WITH THE SECURITIES AND EXCHANGE COMMISSION***].  These obligations
          shall not apply to Information that: 
               
               (i)  is known by the receiving Party at the time of its receipt,
                    and not through a prior disclosure by the disclosing Party,
                    as documented by business records;

              (ii)  is at the time of disclosure or thereafter becomes published
                    or otherwise part of the public domain without breach of
                    this Agreement by the receiving Party;


                                          25
<PAGE>

              (iii) is subsequently disclosed to the receiving Party by a Third
                    Party who has the right to make such disclosure;

               (iv) is developed by the receiving Party independently of the
                    Information or other information received from the
                    disclosing Party and such independent development can be
                    documented by the receiving Party;
               
               (v)  is disclosed to any institutional review board of any entity
                    conducting clinical trials or any governmental or other
                    regulatory agencies in order to obtain patents or to gain
                    approval to conduct clinical trials or to market the
                    Ingredient and/or Products, but such disclosure may be made
                    only to the extent reasonably necessary to obtain such
                    patents or authorizations; and, in which case reasonable
                    effort shall be taken to maintain the confidentiality of
                    such Information, or
               
               (vi) is required by law, regulation, rule, act or order of any
                    governmental authority or agency to be disclosed by a Party,
                    PROVIDED that notice is promptly delivered to the other
                    Party in order to provide an opportunity to seek a
                    protective order or other similar order with respect to such
                    Information and thereafter the disclosing Party discloses to
                    the requesting entity only the minimum Information required
                    to be disclosed in order to comply with the request, whether
                    or not a protective order or other similar order is obtained
                    by the other Party.

     10.2 PERMITTED DISCLOSURES.  Information may be disclosed to employees,
          agents, consultants, sublicensees or suppliers of the recipient Party
          or its Affiliates, but only to the extent required to accomplish the
          purposes of this Agreement and only if the recipient Party obtains
          prior agreement from its employees, agents, consultants, sublicensees
          or suppliers to whom disclosure is to be made to hold in confidence
          and not make use of such Information for any purpose other than those
          permitted by this Agreement.  Each Party will use at least the same
          standard of care as it uses to protect proprietary or confidential
          information of its own to ensure that such employees, agents,
          consultants, sublicensees or suppliers do not disclose or make any
          unauthorized use of the Information.
          
     10.3 DISCLOSURE OF AGREEMENT.  Neither GalaGen nor Wyeth-Ayerst shall
          release to any Third Party or publish in any way any non-public
          information with respect to the terms of this Agreement or concerning
          their cooperation without the prior written consent of the other,
          which consent will not be unreasonably withheld or delayed, PROVIDED,
          HOWEVER, that either Party may disclose the terms of this Agreement to
          the extent required to comply with applicable laws, including without
          limitation the rules and regulations promulgated by the United States


                                          26
<PAGE>

          Securities and Exchange Commission and the Party intending to disclose
          the terms of this Agreement shall provide the nondisclosing Party an
          opportunity to review and comment on the intended disclosure which is
          reasonable under the circumstances.  Notwithstanding any other
          provision of this Agreement, each Party may disclose the terms of this
          Agreement to lenders, investment bankers and other financial
          institutions of its choice solely for purposes of financing the
          business operations of such Party either (i) upon the written consent
          of the other Party or (ii) if the disclosing Party uses reasonable
          efforts to obtain a signed confidentiality agreement with such
          financial institution with respect to such information on terms
          substantially similar to those contained in this Article 10.

     10.4 PUBLICITY.  Subject to Section 10.3, all publicity, press releases and
          other announcements relating to this Agreement or the transactions
          contemplated hereby shall be reviewed in advance by, and shall be
          subject to the approval of, both Parties.
          

11.  MISCELLANEOUS

     11.1 FORCE MAJEURE.  Neither Party shall be liable to the other for delay
          or failure in the performance of the obligations on its part contained
          in this Agreement if and to the extent that such failure or delay is
          due to circumstances beyond its control which it could not have
          avoided by the exercise of reasonable diligence.  It shall notify the
          other Party promptly should such circumstances arise, giving an
          indication of the likely extent and duration thereof, and shall use
          all commercially reasonable efforts to resume performance of its
          obligations as soon as practicable.

     11.2 ASSIGNMENT.  
          
          11.2.1    ASSIGNMENT BY GALAGEN.  GalaGen may assign any of its rights
                    or obligations under this Agreement in any country to any of
                    its Affiliates, for so long as they remain Affiliates. 
                    GalaGen may also assign its rights and obligations under
                    this Agreement in connection with a merger or similar
                    reorganization or the sale of all or substantially all of
                    its assets.  GalaGen shall not otherwise assign any of its
                    rights or obligations under this Agreement without the prior
                    written consent of Wyeth-Ayerst, which consent may be
                    provided or withheld in Wyeth-Ayerst's sole discretion.  Any
                    assignment under this Section 11.2.1 by GalaGen of its
                    rights and/or obligations under this Agreement shall not
                    relieve GalaGen of its responsibilities for the performance
                    of its obligations under this Agreement.
               
          11.2.2    ASSIGNMENT BY WYETH-AYERST.  Wyeth-Ayerst may assign any of
                    its rights or obligations under this Agreement in any
                    country to any of its Affiliates or to one or more Third
                    Parties.  Wyeth-Ayerst shall notify 


                                          27
<PAGE>

                    GalaGen, in writing, upon making any such assignment.  In
                    the event Wyeth-Ayerst assigns any of its rights or
                    obligations under this Agreement in connection with a merger
                    or similar reorganization or the sale of all or
                    substantially all of its assets or a sale of that part of
                    its business relating to the subject matter of this
                    Agreement, no intellectual property rights of the acquiring
                    corporation shall be included in the technology licensed
                    hereunder.  Any assignment under this Section 11.2.2 by
                    Wyeth-Ayerst shall not relieve Wyeth-Ayerst of its
                    responsibilities for the performance of its obligations
                    under this.
               
          11.2.3    BINDING NATURE OF ASSIGNMENT.  This Agreement shall be
                    binding upon and inure to the benefit of the successors and
                    permitted assigns of the Parties.  Any assignment not in
                    accordance with this Section 11.2 shall be void.
          
     11.3 NO WAIVER.  The failure of either Party to require performance by the
          other Party of any of that other Party's obligations hereunder shall
          in no manner affect the right of such Party to enforce the same at a
          later time.  No waiver by any Party hereto of any condition, or of the
          breach of any provision, term, representation or warranty contained in
          this Agreement, whether by conduct or otherwise, in any one or more
          instances, shall be deemed to be or construed as a further or
          continuing waiver of any such condition or breach, or of any other
          condition or of the breach of any other provision, term,
          representation or warranty hereof.
          
     11.4 SEVERABILITY.  If a court or other tribunal of competent jurisdiction
          should hold any term or provision of this Agreement to be excessive,
          or invalid, void or unenforceable, the offending term or provision
          shall be deleted, and, if possible, replaced by a term or provision
          which, so far as practicable achieves the legitimate aims of the
          Parties.
          
     11.5 RELATIONSHIP BETWEEN THE PARTIES.   Both Parties are independent
          contractors under this Agreement.  Nothing herein contained shall be
          deemed to create an employment, agency, joint venture or partnership
          relationship between the Parties hereto or any of their agents or
          employees, or any other legal arrangement that would impose liability
          upon one Party for the act or failure to act of the other Party. 
          Neither Party shall have any express or implied power to enter into
          any contracts or commitments or to incur any liabilities in the name
          of, or on behalf of, the other Party, or to bind the other Party in
          any respect whatsoever.
          
     11.6 CORRESPONDENCE AND NOTICES.
          
          11.6.1    Correspondence, reports, documentation , and any other
                    communication in writing between the Parties in the course
                    of implementation of this Agreement shall be in writing and
                    sent by prepaid air mail, or by facsimile confirmed by
                    prepaid registered or certified air mail letter, and shall
                    be 


                                          28
<PAGE>

                    deemed to have been properly served to the addressee upon
                    receipt of such written communication.
               
          11.6.2    In the case of GalaGen, the proper address for
                    communications and for all payments shall be:

                              GalaGen, Inc.
                              4001 Lexington Avenue North
                              Arden Hills, Minnesota  55126  USA
                              Attn:  Chief Executive Officer
                    
                    and it the case of Wyeth-Ayerst, the proper address for
                    communications and for all payments shall be:
               
                              Wyeth-Ayerst Laboratories
                              555 Lancaster Avenue
                              St. Davids, Pennsylvania  19087
                              Attn:  Senior Vice President, Global Business
                              Development
                    
                    With a copy to:
               
                              American Home Products Corporation
                              5 Giralda Farms
                              Madison, New Jersey  07940
                              Attn:  Senior Vice President and General Counsel
          
     11.7 CHOICE OF LAW.  This Agreement is subject to and governed by the laws
          of the State of Delaware, excluding its conflict of laws provisions.
          
     11.8 ENTIRE AGREEMENT; AMENDMENT. This Agreement, together with the other
          Transaction Agreements, including the Exhibits and Schedules hereto
          and thereto and all the covenants, promises, agreements, warranties,
          representations, conditions and understandings contained herein and
          therein sets forth the complete, final and exclusive agreement between
          the Parties and supersedes and terminates all prior and
          contemporaneous agreements and understandings between the Parties,
          whether oral or in writing.  There are no covenants, promises,
          agreements, warranties, representations, conditions or understandings,
          either oral or written, between the Parties other than as are set
          forth in the Transaction Agreements.  No subsequent alteration,
          amendment, change, waiver or addition to this Agreement shall be
          binding upon the Parties unless reduced to writing and signed by an
          authorized officer of each Party.  No understanding, agreement,
          representation or promise, not explicitly set forth herein, has been
          relied on by either Party in deciding to execute this Agreement. 


                                          29
<PAGE>

    11.9  HEADINGS. The headings and captions used in this Agreement are solely
          for the convenience of reference and shall not affect its
          interpretation.
          
    11.10 COUNTERPARTS.  This Agreement may be executed in one or more
          counterparts each of which shall be an original and all of
          which shall constitute together the same document.

    11.11 FURTHER ACTIONS.  Each Party agrees to execute, acknowledge
          and deliver such further instruments, and to do all other
          acts, as may be necessary or appropriate in order to carry
          out the purposes and intent of this Agreement including,
          without limitation, any filings with any antitrust agency
          which may be required.

     IN WITNESS WHEREOF, this Agreement has been executed by the duly authorized
representatives of the Parties as of the date set forth above.


AMERICAN HOME PRODUCTS CORPORATION      GALAGEN INC.


/s/ Tuan Ha-Ngoc                        /s/ Robert A. Hoerr
- -----------------------------------     -----------------------------------
Name:  Tuan Ha-Ngoc                     Name:  Robert A. Hoerr
Title: Vice President - Strategic       Title: President & CEO
       Development


                                          30


<PAGE>

                                                                   Exhibit 10.32

                         PRODUCT DEVELOPMENT COLLABORATION,
                             MANUFACTURING AND SUPPLY,
                           AND RETAIL MARKETING AGREEMENT


     THIS AGREEMENT (the "Agreement") is made and entered into as of the 22 day
of December, 1998, by and among GALAGEN INC., a Delaware corporation, located at
4001 Lexington Avenue North, Arden Hills, Minnesota 55126-2939 ("GalaGen"),
GENERAL NUTRITION CORPORATION, a Pennsylvania corporation located at 300 Sixth
Avenue, Pittsburgh, Pennsylvania 15222 ("GNC") and GENERAL NUTRITION PRODUCTS,
INC., a South Carolina corporation, located at 1050 Woodruff Road, Greenville,
South Carolina 29607 ("GNP").

                                      RECITALS

     WHEREAS, GNC is a retailer of a large line of proprietary brand and third
party dietary supplement and food products; and

     WHEREAS, GalaGen is a developer, manufacturer and supplier of proprietary
dietary supplement, clinical nutrition and pharmaceutical products; and

     WHEREAS, GNP is a manufacturer of dietary supplement and food products; and

     WHEREAS, GalaGen and GNC wish to enter into an exclusive collaboration
relationship to develop and market a range of immune-boosting dietary
supplements for specialized retail channels and mass market retail channels,
subject to the terms and conditions herein; and

     WHEREAS, GalaGen wishes to sell its proprietary Proventra-TM- brand natural
immune components to GNP during the term of this Agreement so that GNP may
incorporate Proventra-TM- products, i.e., encapsulate and package, into dietary
supplements and sports nutritional formulas for distribution and retail
marketing by GNC, its affiliates, franchisees [***CONFIDENTIAL TREATMENT
REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION***];

     NOW, THEREFORE, in consideration of the mutual promises and covenants
contained herein and other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, GNC, GNP and GalaGen agree as
follows:

                                    DEFINITIONS

     "CPI" shall mean the United States Consumer Price Index-Urban Edition.

     "Collaborative Research and Development Program" is defined in
Section 12.b.

     "Direct Negotiation" is defined in Section 25.


<PAGE>

     "Dispute" is defined in Section 25.

     "Expanded Territory" shall mean additional marketing territory outside of
the Territory from time to time granted to GNC by GalaGen in accordance
herewith, either by individual country or region such as Europe.

     "Field" shall mean the use of Products in Single Component Dietary
Supplements or Sports Nutritional Formulas.  Field shall also mean
Multi-Component Dietary Supplements if after the date hereof GalaGen in its sole
discretion grants in writing to GNP and GNC rights with respect to
Multi-Component Dietary Supplements, and then only to the extent provided in
such written grant of rights, and shall not be construed for purposes of any
provision of this Agreement to include Multi-Component Dietary Supplements
unless and to the extent provided in such written grant of rights.

     "Food, Drug and Cosmetic Act" shall mean the United States Food, Drug and
Cosmetic Act, 21 USC 301 et seq.

     "Good Manufacturing Practices" means good manufacturing practices
promulgated under the Food, Drug and Cosmetic Act.

     "Individual Channel" shall mean any individual retail channel within the
Mass Market Retail Channels including without limitation, discount stores, chain
drug stores, independent retail pharmacies, grocery stores and direct/internet
consumer sales.

     "Invention" shall mean any invention conceived in the course of the
Collaborative Research and Development Program authorized by the Joint
Development Committee in accordance with and during the term of this Agreement.

     "Joint Development Committee" shall mean a committee formed in accordance
with Section 12.a.

     "Joint Inventions" is defined in Section 16.a.

     "Mass Market Retail Channel" shall mean any Individual Channel other than a
Specialized Retail Channel.

     "Multi-Component Dietary Supplement" shall mean any dietary supplement,
which is not a Single Component Dietary Supplement, whether in pill, capsule,
tablet, gelcap or powdered form, that contains Proventra-TM- [***CONFIDENTIAL
TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
EXCHANGE COMMISSION***].

     "Option Period" shall mean one (1) year from the date hereof.

     "Orders" is defined in Section 2.

     "Outlet/Sales Requirements for Mass Market" means [***CONFIDENTIAL


                                          2
<PAGE>

TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
EXCHANGE COMMISSION***]

     "Outlet/Sales Requirements for Specialized Retail" means [***CONFIDENTIAL
TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
EXCHANGE COMMISSION***]

     "Party" shall mean either GalaGen or GNC and/or GNP, as the case may be,
while "Parties" shall mean GalaGen, GNC and GNP collectively.

     "Product" shall mean [***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED
FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***].

     "Release Specifications" is defined in Section 15.

     "Right of First Refusal" is defined in Section 5.

     "Single Component Dietary Supplement" shall mean [***CONFIDENTIAL TREATMENT
REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION***].

     "Specialized Retail Channel" shall mean specialty health food, nutrition or
dietary supplement retail stores, including without limitation any store or
franchisee of GNC, including Nature's Northwest Food Stores.

     "Sports Nutritional Formula" shall mean a nutritional supplement, whether
in pill, capsule, tablet, gelcap or powdered formula, containing
[***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION***], intended for the nutritional support of
individuals participating in sports activities.

     "Territory" shall mean North America, including the United States, Canada
and Mexico.

     "Third Party" means a party other than the Party or its affiliates.

     "Trademark License" shall be the license granted hereunder for the right
and requirement to use the Proventra-TM- mark shown in EXHIBIT A on all products
sold by GNC, its affiliates, franchisees, [***CONFIDENTIAL TREATMENT REQUESTED;
PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]
or sub-licensees which contain Product and "Trademark" shall mean the
Proventra-TM- mark.

                                       TERMS


                                          3
<PAGE>

     1.   PURCHASE AND SALE; EXCLUSIVITY.

          1.a  PURCHASE AND SALE.  During the term of this Agreement, GalaGen
shall offer and GNP shall purchase from GalaGen Products in bulk which GNP
shall, at its expense, package and label and make into finished product.
GalaGen shall be the exclusive supplier of Products to GNP and GNP shall be the
exclusive manufacturer of products incorporating such Products for GNC and its
affiliates and franchisees and [***CONFIDENTIAL TREATMENT REQUESTED; PORTION
OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***],
provided that nothing herein shall limit GalaGen's right to have Products
manufactured for it.  Without GalaGen's prior written consent, GNP will not
manufacture products incorporating such Products for any parties other than GNC,
its affiliates and franchisees and [***CONFIDENTIAL TREATMENT REQUESTED; PORTION
OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***].  GNC
and its affiliates, and franchisees and [***CONFIDENTIAL TREATMENT REQUESTED;
PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]
will not sell products incorporating such Products outside of the Field,
Territory and Specialized Retail Channel and Mass Market Retail Channel.

          1.b  EXCLUSIVITY.  Subject to Sections 1.c, 1.d, 1.e and 3.a., GNC and
its affiliates and franchisees and [***CONFIDENTIAL TREATMENT REQUESTED; PORTION
OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***] shall
be the exclusive licensee to sell products incorporating such Products in Single
Component Dietary Supplements and in Sports Nutritional Formulas within the
Specialized Retail Channel and Mass Market Retail Channels in the Territory
during the term of this Agreement.

          1.c  EXCEPTIONS.  Except as expressly granted in writing by GalaGen,
neither GNP nor GNC, nor any affiliate, franchisee or [***CONFIDENTIAL TREATMENT
REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION***], shall have any rights, exclusive or otherwise, to
[***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION***] products.  Without limiting the
foregoing, but subject to the Right of First Refusal in Section 5, GalaGen
reserves the right to make, use, and sell Products outside of the Field.  Except
as expressly granted in writing by GalaGen, neither GNP nor GNC, nor any
affiliate, franchisee or [***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED
FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***] shall have any
rights to manufacture, sell or otherwise distribute Products in Multi-Component
Dietary Supplements.

     [***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH
THE SECURITIES AND EXCHANGE COMMISSION***].

     2.   QUANTITIES.  GalaGen shall supply and ship Products to GNP in the
quantities


                                          4
<PAGE>

ordered on, and pursuant to the terms and conditions contained in, GNP's
Standard Purchase Order, [***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED
FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***].  To the extent
the terms of such Standard Purchase Order are inconsistent with the terms of
this Agreement, this Agreement shall control.

     3.   ORDERS AND FORECASTS.

          3.a  ORDERS AND FORECASTS.  GNP will place Orders for the purchase of
[***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION***] of Products to be delivered by GalaGen
during the calendar year 1999 to maintain the exclusivity rights granted under
Section 1.b.  If GNP does not place Orders for such quantities of Products
during 1999, GNP and GNC shall thereafter have a right to manufacture and sell
products incorporating such Products in the Specialized Retail Channel and Mass
Market Retail Channels on a non-exclusive basis until this Agreement terminates
or expires.  GNP shall place Orders with GalaGen for Products at least twelve
(12) weeks prior to the anticipated shipment date for the Products, provided
that GalaGen may require a longer lead time for Orders of [***CONFIDENTIAL
TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
EXCHANGE COMMISSION***] at the time it agrees to make such products available
hereunder.

          3.b  REVIEWS.  The parties shall confer at least quarterly to review
forecasts and to consult on matters relating to the scheduling of manufacturing
and delivery of Products.

     4.   OPTION FOR EXPANDED TERRITORY.

          4.a  OPTION EXERCISE.  In the event GNC desires to sell products
within the Field incorporating one or more Products in an Expanded Territory,
GNC shall have the right within the Option Period to give GalaGen written notice
of the territory outside of the Territory that GNC desires to sell such products
and the Product or Products that GNC desires to incorporate into such products
(unless GalaGen has previously granted rights to a Third Party to sell products
incorporating such Products within such territory after the failure of GNC to
exercise its Right of First Refusal under Section 5).

          4.b  GOOD FAITH NEGOTIATIONS.  Upon receipt of such notice, the
Parties agree to negotiate in good faith the terms upon which GNC will be
granted the right to sell products incorporating such Products in the Expanded
Territory, including whether such rights will be exclusive and, if exclusive,
the minimum outlet/sales requirements required to maintain such exclusivity, the
price of Products (which shall not be less than the price provided for
hereunder), the delivery terms (which shall not require GalaGen to assume any
expenses associated with delivery of Products in the Expanded Territory greater
than GalaGen's costs associated with delivery of the Products within the
Territory) and such other terms as the Parties deem appropriate, provided,
however, that GalaGen may require as a


                                          5
<PAGE>

condition to entering into such good faith negotiations that GNC demonstrate to
GalaGen's reasonable satisfaction that GNC has a commercially reasonable plan to
enable it to sell products incorporating such Products in the Expanded Territory
on a competitive basis.  For purposes hereof, "competitive basis" shall mean
that GNC has a reasonable prospect of being able to penetrate and sell
substantial quantities of such products in the proposed Expanded Territory
within a reasonable period of time.

          4.c  FAILURE TO REACH AGREEMENT.  In the event that, notwithstanding
such good faith negotiations, the Parties are unable to reach agreement as to
the terms upon which GalaGen will make such Products available to GNC for
incorporation into products to be sold in the Expanded Territory within six (6)
months after GNC's notice to GalaGen of its desire to sell such products, either
Party shall be free to terminate such negotiations and, subject to the Right of
First Refusal, if any, of GNC, GalaGen shall be free to sell Products to Third
Parties for incorporation into products that may be sold in the territory with
respect to which GNC desired to be granted Expanded Territory.

     5.   RIGHT OF FIRST REFUSAL.

          5.a  GALAGEN NOTICE.  In the event GalaGen desires to sell Product to
a Third Party within the Option Period who intends to incorporate such Product
into products within the Field to be sold outside of the Territory, GalaGen
shall give GNC written notice of its desire to sell such Product to such Third
Party and the material terms and conditions of such proposed sales (including
the Product or Products proposed to be sold, the territory in which such Product
or Products will be sold, the price and other terms of sale of such Product or
Products and any minimum volume purchase commitments by such Third Party).

          5.b  EXERCISE OF RIGHT.  For a period of sixty (60) days thereafter,
GNC shall have a right of first refusal (the "Right of First Refusal") to enter
into an agreement with GalaGen to purchase such Products on the terms and
conditions that such Third Party is willing to purchase such Products (including
without limitation, price and minimum volume commitments) in the territory that
such Third Party proposes to sell products incorporating such Products or on
terms that, when taken as a whole, are at least as favorable to GalaGen as the
terms specified in the written notice provided to GNC.  GalaGen may as a
condition to the exercise of such Right of First Refusal require that GNC
demonstrate to GalaGen's reasonable satisfaction that GNC has a commercially
reasonable plan to enable it to sell products incorporating such Products in the
territory on a competitive basis.  For purposes of this Section 5, "competitive
basis" shall mean that GNC has a reasonable prospect of being able to sell such
products in the proposed territory on a basis reasonably comparable to the Third
Party's ability to market such products.

          5.c  FAILURE TO EXERCISE.  Failure to exercise such Right of First
Refusal within such sixty (60) day period, shall be deemed a waiver by GNC of
its Right of First Refusal.  In the event GNC does not exercise its Right of
First Refusal, GalaGen shall thereafter be free to sell such Products to such
Third Party in accordance with the material terms and conditions of such
proposed sales or on terms that, when taken as a whole, are at



                                          6
<PAGE>

least as favorable to GalaGen as the terms specified in the written notice
provided to GNC.  Moreover, once GalaGen has entered into an agreement to sell
Products to a Third Party outside of the Territory in accordance herewith, GNC
shall no longer have any Right of First Refusal with respect to the right to
sell products incorporating the Product or Products which GalaGen has agreed to
sell to such Third Party in the territory that GalaGen has agreed to permit such
Third Party to sell products incorporating the Product or Products, regardless
of whether such Third Party continues to have a right to sell such products in
such territory or in such Individual Channel or Channels.

     6.   TERM.  The Term of this Agreement shall be for a period of
[***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION***] years from the date hereof unless earlier
terminated in accordance with Section 20.  After the Term, this Agreement will
renew on a yearly basis unless GNC gives GalaGen at least six (6) months prior
written notice that it intends not to extend this Agreement or, if all of the
Products covered by this Agreement are being sold on a non-exclusive basis,
GalaGen gives GNC at least six (6) months prior written notice that it is
terminating this Agreement.  In addition, in the event rights to the Specialized
Retail Channel or a Mass Market Retail Channel have become non-exclusive,
GalaGen shall have the right after the Term upon at least six (6) months prior
written notice, to terminate GNC's non-exclusive right to sell products
incorporating Product into the non-exclusive channel or channels  Renewal will
be on an exclusive basis in the Specialized Retail Channel if the Outlet/Sales
Requirements for Specialized Retail have been met for the year preceding such
renewal, to the extent that such Rights are exclusive at the time of such
renewal.  Renewal will be on an exclusive basis in the applicable Mass Market
Retail Channel if the Outlet/Sales Requirements for Mass Market have been met
for the year preceding such renewal, to the extent that such Rights are
exclusive at the time of such renewal.  Minimum Outlet/Sales Requirements for
Specialized Retail and/or Minimum Outlet/Sales Requirements for Mass Market for
the renewal period will be mutually negotiated, provided that if the parties
cannot agree upon such Minimum Outlet/Sales Requirements prior to expiration of
the then current Term, GalaGen shall allow GNC to renew GNC's rights in the
Specialized Retail Channel and/or the Mass Market Retail Channel, as the case
may be, on a non-exclusive basis for an additional one (1) year period.

     7.   PAYMENT.  [***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED FILED
SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***].

     8.   WARRANTIES.

          8.a  GALAGEN.  GalaGen expressly represents and warrants that Products
sold hereunder (a) are of good and merchantable quality and fit and safe for
consumer use; (b) have been manufactured, packaged and stored in accordance with
the applicable standards of Good Manufacturing Practices and requirements of all
applicable Federal, state and local laws, rules and regulations; (c) are not
adulterated or misbranded within the meaning of the Food, Drug and Cosmetic Act
nor an article under the provisions of Section


                                          7
<PAGE>

404 or Section 505 of the Food, Drug and Cosmetic Act which may not be
introduced into interstate commerce; and (d) are not a "new dietary ingredient"
as defined under the Dietary Supplement Health and Education Act of 1994
('DSHEA") or will have complied with such notice or other requirements as may be
applicable to a "new dietary ingredient" under DSHEA.  GalaGen further
represents and warrants that (w) use of the Proventra-TM- mark pursuant to the
Trademark License granted hereunder does not violate the trademark rights of any
Third Party; (x) GalaGen is the sole exclusive manufacturer and supplier of
Products in the United States (except to the extent GalaGen may grant rights to
have Products manufactured for it), (y) the Products are free of infringement of
any United States patent rights, provided, however that no representation or
warranty is made if the claim of infringement includes GNC's end product and the
basis of the claim is the mixture of Products with other ingredients and (z) the
consent of any Third Party is not needed or required for GalaGen to sell
Products to GNP or to enter into this Agreement.  All such warranties shall
survive inspection, tests, acceptance and payment.

          8.b  GNP.  GNP represents and warrants that it shall store the
Products in strict compliance with all applicable laws, including, without
limitation, the Food, Drug and Cosmetic Act and all relevant establishment and
product licenses.  GNP further represents and warrants that, subject to the
representations and warranties of GalaGen herein being true and correct, all
products containing Products will (a) be of good and merchantable quality and
fit and safe for consumer use; (b) be manufactured, packaged, stored and shipped
in accordance with the applicable standards of Good Manufacturing Practices and
requirements of all applicable Federal, state and local laws, rules and
regulations; (c) not be adulterated or misbranded within the meaning of the
Food, Drug and Cosmetic Act nor an article under the provisions of Section 404
or Section 505 of the Food, Drug and Cosmetic Act which may not be introduced
into interstate commerce; and (d) will not infringe any United States patent
rights of any third party.

          8.c  GNC.  GNC represents and warrants that it shall store, ship and
sell all products containing Products in strict compliance with all applicable
laws, including, without limitation, the Food, Drug and Cosmetic Act and all
relevant establishment and product licenses.

     9.   RECALLS.   Without limiting the generality of the representations and
warranties made in Section 8, GNC represents and warrants that it shall observe
at all times the laws and regulations in the United States in order to maintain
an effective system for the recall from the market of any products containing
Products. In the event of any recall of any product containing Products, GalaGen
shall reasonably cooperate with GNC in any related investigation; provided that
GNC shall pay all of GalaGen's reasonable out-of-pocket costs and expenses
associated with the recall unless such recall arises out of failure of Products
supplied hereunder to conform to the Release Specifications or warranties.  In
the event any recall of product containing Products arises out of failure of
Products supplied hereunder to conform to the Release Specifications or
warranties, GalaGen shall reasonably cooperate with GNC in any related
investigation and pay all of GNC's reasonable out-of-pocket costs and expenses
associated with the recall, including, but not limited to, costs of packaging,



                                          8
<PAGE>

transporting and disposing of products containing Products.

     10.  INDEMNIFICATION.

          10.a INDEMNIFICATION BY GNC/GNP.  GNC and GNP shall, jointly and
severally, indemnify, defend and hold harmless GalaGen and its affiliates, and
each of its and their respective employees, officers, directors and agents
(each, a "GalaGen Indemnified Party") from and against any and all liability,
loss, damage, cost and expense (including reasonable attorneys' fees)
(collectively, a "Liability"), which the GalaGen Indemnified Party may incur,
suffer or be required to pay resulting from or arising in connection with (i)
the breach by GNC or GNP or their affiliates or franchisees [***CONFIDENTIAL
TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
EXCHANGE COMMISSION***] of any covenant, representation or warranty contained in
this Agreement, (ii) willful misconduct or negligent acts or omissions of GNC or
GNP, their respective affiliates, franchisees [***CONFIDENTIAL TREATMENT
REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION***] or any of their employees, officers, directors or agents, or
(iii) the successful enforcement by a GalaGen Indemnified Party of its rights
under this Section 10.a.  Notwithstanding the foregoing, GNC/GNP shall have no
obligation under this Agreement to indemnify, defend or hold harmless any
GalaGen Indemnified Party with respect to claims, demands, costs or judgments
which result from willful misconduct or negligent acts or omissions of GalaGen,
its affiliates, or any of their respective employees, officers, directors or
agents.

          10.b INDEMNIFICATION BY GALAGEN.  GalaGen shall indemnify, defend and
hold harmless GNC, GNP and their franchisees, affiliates [***CONFIDENTIAL
TREATMENT REQUESTED; PORTION OMITTED FILED SEPARATELY WITH THE SECURITIES AND
EXCHANGE COMMISSION***], and each of their respective employees, officers,
directors and agents (each, a "GNC/GNP Indemnified Party") from and against any
Liability, which the GNC/GNP Indemnified Party may incur, suffer or be required
to pay resulting from or arising in connection with (i) the breach by GalaGen of
any covenant, representation or warranty contained in this Agreement; (ii)
willful misconduct or negligent acts or omissions of GalaGen, its affiliates, or
any of their respective employees, officers, directors or agents; (iii) GNP's or
GNC's use or sale of the Products (except where such Liability was the result of
GNP's or GNC's breach of representations or warranties herein or GNP's or GNC's
negligence or willful misconduct) or (iv) the successful enforcement by a
GNC/GNP Indemnified Party of its rights under this Section 10.b.
Notwithstanding the foregoing, GalaGen shall have no obligation under this
Agreement to indemnify, defend, or hold harmless any GNC/GNP Indemnified Party
with respect to claims, demands, costs or judgments which result from willful
misconduct or negligent acts or omissions of GNC/GNP, their affiliates, or any
of their respective employees, officers, directors or agents.

          10.c CONDITIONS TO INDEMNIFICATION.  The obligations of the
Indemnifying Party under Sections 10.a and 10.b are conditioned upon the
delivery of written notice to the


                                          9
<PAGE>

Indemnifying Party of any potential Liability promptly after the Indemnified
Party becomes aware of such potential Liability. The Indemnifying Party shall
have the right to assume the defense of any suit or claim related to the
Liability if it has assumed responsibility for the suit or claim in writing;
however, if in the reasonable judgment of the Indemnified Party, such suit or
claim involves an issue or matter which could have a materially adverse effect
on the business operations or assets of the Indemnified Party, the Indemnified
Party may waive its rights to indemnity under this Agreement and control the
defense or settlement thereof, but in no event shall any such waiver be
construed as a waiver of any future indemnification rights such Party may have
at law or in equity. If the Indemnifying Party defends such suit or claim, the
Indemnified Party may participate in (but not control) the defense thereof at
its sole cost and expense.

          10.d SETTLEMENTS.  Neither Party may settle a claim or action related
to a Liability without the consent of the other Party, if such settlement would
impose any monetary obligation on the other Party or require the other Party to
submit to an injunction or otherwise limit the other Party's rights under this
Agreement. Any payment made by a Party to settle any such claim or action shall
be at its own cost and expense.

     11.  INSURANCE.  GalaGen shall maintain during the term of this Agreement a
policy of general liability insurance, including products liability insurance,
business interruption insurance and contractual insurance, with limits of no
less than two million dollars, from a reliable insurance carrier acceptable to
GNC, which acceptance may not be unreasonably withheld. GalaGen shall name GNC
and GNP as additional insured under such coverage. GalaGen shall keep and
maintain its general liability insurance in effect during the term of this
Agreement. GalaGen shall notify GNC immediately upon cancellation of, or any
reduction in, its general liability insurance coverage, and cancellation or
reduction of such general liability coverage shall constitute a material breach
of this Agreement, provided however, that GalaGen shall be entitled to cure such
breach within forty-five (45) days provided that, during the forty-five (45) day
cure period, the insurance coverage is maintained, reinstated or re-established
without a lapse.  GNC shall name GalaGen as additional insured under the general
liability insurance, including products liability insurance, maintained by GNC.

     12.  JOINT DEVELOPMENT COMMITTEE.

          12.a FORMATION.  The Parties agree to establish a joint development
committee (the "Joint Development Committee") within forty-five (45) days after
the Effective Date.  The Joint Development Committee will be comprised of four
(4) representatives: two (2) of whom shall be appointed by GalaGen and two (2)
of whom shall be appointed by GNC and GNP.  One of the members of the Joint
Development Committee shall be appointed its chairperson.

          12.b RESPONSIBILITIES.  The Joint Development Committee will:

               (i)  from time to time develop programs for the collaboration of
          the Parties in the development of Products and products that use
          Products (the


                                          10
<PAGE>

"Collaborative Research and Development Program");

               (ii) monitor the progress of and compliance with the
          Collaborative Research and Development Program;

               (iii)     develop Release Specifications;

               (iv) review and evaluate the results of studies performed in
          connection with the Collaborative Research and Development Program.

               (v)  review and consider whether Proprietary Proventra-TM-
          Formulations or [***CONFIDENTIAL TREATMENT REQUESTED; PORTION OMITTED
          FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION***]
          products should be added as Products and, if so, the terms on which
          such products will be added.

          12.c MEETINGS.  The Joint Development Committee shall meet no less
than once every three (3) months.  The chairperson shall call meetings when
deemed appropriate or when requested by any member of the Joint Development
Committee.  If possible, the meetings shall be held in person, or where
appropriate by video or telephone conference.  When held in person, the location
of such meetings shall alternate between GalaGen's facilities and GNC's
facilities.  Each Party shall be responsible for the expenses incurred by its
representatives in attending such meetings.

     13.  MARKETING, TECHNICAL AND CLINICAL DEVELOPMENT SUPPORT.  GalaGen will
provide research and development for the development of commercially attractive
products approved by the Joint Development Committee, subject to agreement on
funding for such research and development.  Funding for such research and
development will be established on a case-by-case basis. GalaGen will support
GNC's marketing of products containing Products with up-to-date technical
information, content for consumer educational material, and design of
appropriate clinical testing protocols, to be conducted and funded as negotiated
by GNC and GalaGen for specific needs.  GNC and GalaGen agree to use good faith
efforts to promote GNC products containing Products through publications or
other media outlets. GalaGen agrees to allow GNC to use all information relating
to Products in GNC's labeling and advertisement of products containing Products.
GNC and GalaGen agree to review the feasibility of implementing research studies
on GNC products containing Products either alone or in combination with other
ingredients.

     14.  TRADEMARKS.  GalaGen hereby grants to GNC and GNP the Trademark
License for the purpose specified herein.  GalaGen shall provide GNC and GNP
with camera ready artwork of the GalaGen trademark Proventra-TM- and reasonable
guidelines (the "Guidelines") governing the use of the GalaGen Trademark (such
as size, color and placement).  The Guidelines will reflect that the GalaGen
Trademark is to be displayed in such a manner so as to convey the impression
that the finished GNC products include Products.  GNC and GNP shall not permit
any agent or subdistributor to use the GalaGen Trademark without GalaGen's prior
written approval;  use or permit any agent to use any trademark or product


                                          11
<PAGE>

names confusingly similar to Products; or use or permit any agent to use the
GalaGen Trademark on any objects, other than those containing Products.  GNC and
GNP agree to notify GalaGen in writing of any claim or action for infringement
or unfair competition relating to the GalaGen Trademark, which is threatened or
brought against GNC/GNP by a third party and of any conflicting uses of,
application or registrations for, or acts of infringement or unfair competition
involving the GalaGen Trademark promptly after GNC/GNP learns of any such
matter.  GNC/GNP shall furnish all records, documents, specimens and testimony
relating to such claim or action to GalaGen (at GalaGen's expense) as GalaGen
may request and shall otherwise cooperate with GalaGen in any such claim or
action.

     15.  TESTING AND QUALITY CONTROL.

          15.a SPECIFICATIONS; INSPECTION.  All Products delivered to GNP must
meet the specifications in SCHEDULE 2 (or as otherwise  agreed to by the parties
and incorporated herein, the "Release Specifications") and contain a certificate
of analysis.  Prior to the initial shipment of Products to GNP, GalaGen agrees
to provide GNP with complete specifications. Further, GalaGen agrees to provide
GNP with analytical test methodology and analytical and technical information on
Products for quality control purposes.  GNP shall have the right to inspect
during reasonable business hours GalaGen's production facilities used in
connection with the manufacture of Products.  GalaGen agrees to grant GNP
reasonable access to the reports, records and other documents relating to the
manufacture of Products, including copies of all inspection and other reports by
federal, state and local regulatory agencies.  GalaGen shall have the right to
inspect GNP's production facilities during reasonable business hours in
connection with production of products incorporating Products.

          15.b STABILITY TESTING.  Stability testing consistent with GalaGen's
existing program for stability testing will be undertaken at GalaGen's expense
for Products.  Any stability testing requested by GNC beyond GalaGen's existing
program will be funded by GNC.  GalaGen will bill GNC at cost for additional
stability testing that may be required for combination formula products
developed jointly by the two companies.

     16.  INVENTIONS.

          16.a OWNERSHIP.  GalaGen shall own all Inventions made solely by its
employees and agents, and all patent applications and patents claiming such
Inventions.  GNC or GNP, as the case may be, shall own all Inventions made
solely by its employees and agents and all patent applications and patents
claiming such Inventions.  All Inventions made jointly by employees or agents of
GalaGen and employees or agents of GNC and/or GNP ("Joint Inventions") shall be
owned jointly by GalaGen and GNC and/or GNP.  All determinations of inventorship
shall be made in accordance with U.S. law.

          16.b JOINT PATENT APPLICATIONS.  Each Party shall have the right to
identify any Joint Invention that may be patentable.  The Parties shall jointly
take all reasonable steps to seek, maintain and/or prosecute patent applications
for such Joint Inventions and all


                                          12
<PAGE>

patents relating thereto shall be registered in the names of GalaGen and GNC
and/or GNP, as the case may be, while all costs incurred in connection with
seeking, maintaining and/or prosecuting the patent protection shall be borne
equally by GalaGen and GNC (and/or GNP, as the case may be) except as hereafter
provided.  Should either GalaGen or GNC (or GNP, as the case may be) not wish to
pay the costs relating to any patent application filed or to be filed pursuant
to this Section 16.b, then the Party wishing not to pursue such patent
application shall allow the other Party to continue with such application in the
name of the Parties jointly.  In such case, the Party seeking, maintaining
and/or prosecuting the patent protections shall bear all costs incurred in
connection therewith, the non-pursuing Party shall provide reasonable
nonpecuniary assistance and the non-pursuing Party shall grant to the pursuing
Party a worldwide, exclusive, even as to itself, perpetual royalty-free license
to use and/or exploit the technology subject to the patent application.  Such
license will be with right to sublicense.

          16.c USE OF JOINT INVENTIONS.  Subject to Section 16.b, either Party
may use Joint Inventions, or grant licenses to Third Parties thereunder, subject
to the following conditions:

     (i)  To the extent such Joint Invention relates to the manufacture of a
          bovine colostrum-based ingredient (which for purposes hereof shall
          include, without limitation, the preparation of vaccine, vaccination
          of animals, collection and processing of colostrum into bovine
          immunoglobulin concentrates, and the testing, packaging and storage of
          such ingredient), GalaGen shall have the sole right to use and exploit
          such Invention in the manufacture of such ingredients.

     17.  NOTICES.  All demands, notices, and other communications to be given
hereunder, if any, shall be in writing and shall be sufficient for all purposes
if personally delivered, sent by facsimile, sent by nationally-recognized
courier service, or if sent by registered or certified United States mail,
return receipt requested, postage prepaid, and addressed to the respective party
at the postal address set forth herein or to such other address or addresses as
such Party may hereafter designate in writing to the other Party as herein
provided.  The present addresses of the Parties hereto are set forth above. If
personally delivered, notice under this Agreement shall be deemed to have been
given and received and shall be effective when personally delivered.  Notice by
facsimile and nationally-recognized courier service shall be deemed to have been
given when received.  Notice by mail shall be deemed effective and complete upon
deposit in the United States mail.

     18.  ENTIRE AGREEMENT, AUTHORITY AND GOVERNING LAW.  This Agreement, which
includes the Exhibits and Schedules hereto, contains the entire agreement of the
parties relating to its subject matter and the parties agree that this Agreement
supersedes all prior written or oral agreements, representations, and warranties
relating to its subject matter.  No modification of this Agreement shall be
valid unless made in writing and signed by the Parties.  Each Party represents
to the other Party that it has the full right and authority to enter into this
Agreement and to perform the obligations set forth herein of such Party.  This
Agreement shall be enforced in accordance with the laws of the State of
Minnesota and shall


                                          13
<PAGE>

be construed in accordance therewith.

     19.  FORCE MAJEURE.  No Party shall be responsible or liable for any loss,
damage, detention or delay caused by fire, strike, insurrection or riot,
railroad, marine or air embargoes, lockout, accident, or any other cause which
is unavoidable or beyond its reasonable control, provided that performance
shall, as soon as practicable, recommence upon the cessation of such unavoidable
event.

     20.  TERMINATION.  In the event of a material breach by either Party of the
terms and conditions of this Agreement (a "Default"), the nonbreaching party may
give the other party written notice of such Default.  In the event the Default
is remedied within forty-five (45) days following such notice, the notice shall
be null and void.  If such Default is not remedied within such forty-five (45)
day period, the nonbreaching Party may terminate this Agreement upon the
expiration of such remedy period.  The rights of termination referred to in this
Agreement are not intended to be exclusive and are in addition to any other
rights available to the Parties in law or in equity.

     Either Party may terminate this Agreement if there shall be commenced by or
against the other Party any dissolution or any bankruptcy, insolvency or similar
proceedings, or the other Party makes an assignment for the benefit of creditors
or a receiver or trustee shall be appointed for all or substantially all of the
other Party's assets.

     21.  CONFIDENTIALITY.

          21.a CONFIDENTIALITY OBLIGATION.  During the term of this Agreement
and after its expiration or termination, each Party agrees to keep confidential,
and to use all commercially reasonable efforts to require its respective
officers, directors, employees and agents to keep confidential all proprietary
information of the other Party, including without limitation any information
specifically identified by either Party prior to disclosure as being
confidential information, plans and data concerning products, marketing, sales,
customers, and technical or business matters.  Disclosure of such confidential
information shall be made by either Party only to those of its employees and
agents who need to know such information in order to carry on the purposes of
this Agreement, and who have agreed to abide by confidentiality requirements at
least as restrictive as those set forth herein.

          21.b EXCEPTIONS.  These obligations shall not apply to information
that is known at the time of its receipt by the receiving Party and not through
prior disclosure by the disclosing Party, as documented by business records; is
developed by the receiving Party independently of the information received from
the disclosing Party and such independent development can be documented by the
receiving Party; is at the time of disclosure or thereafter becomes published or
otherwise part of the public domain without a breach of this Agreement by the
receiving Party; or is required by law, regulation, rule, act or order of any
governmental authority or agency to be disclosed by a Party, provided that such
Party gives the other Party a reasonable opportunity to seek a protective order
or other similar order and the disclosing Party discloses to the requesting
entity only the minimum confidential information required to be disclosed in
order to comply with the request.


                                          14
<PAGE>

          21.c OTHER PRECAUTIONS.  Other precautions for protecting proprietary
and confidential information of the Parties that are agreed to in writing by the
Parties shall supplement this section and shall not be substituted for the
restrictions herein provided.

     22.  PUBLICITY.  The Parties agree not to disclose, either directly or
indirectly, the existence of (i) this Agreement with any Third Party or the
media without the consent of the other Party and (ii) any differences between
the Parties, or any disputes that have risen to the level of a matter in Direct
Negotiation or litigation, or any facts, directly or indirectly related to such
matters, to any Third Party or the media, provided, however, that either Party
may disclose the terms of this Agreement to the extent required to enforce this
Agreement or to comply with applicable laws, including without limitation the
rules and regulations promulgated by the Securities and Exchange Commission and
the Party intending to disclose the terms of this Agreement shall provide the
nondisclosing Party an opportunity to review and comment on the intended
disclosure which is reasonable under the circumstances.  Notwithstanding any
other provision of this Agreement, either Party may disclose the terms of this
Agreement to lenders, investment bankers and other financial institutions for
purposes of financing operations of such Party, subject to obtaining a
confidentiality agreement from such financial institution.

     23.  WAIVER, ASSIGNMENT AND SEVERABILITY.  The waiver of a breach of any
term or condition of this Agreement shall not be deemed to constitute the waiver
of any further breach of such term or condition or the waiver of any other term
or condition of this Agreement. Neither Party shall have the right to assign
this Agreement or any right or interest herein in part or in whole without the
prior written consent of the other Party.

     24.  NO PARTNERSHIP.  Nothing in this Agreement shall be construed to give
rise to a relationship between the Parties hereto as a joint venture or
partnership or other relationship than that of independent contractors.

     25.  MANDATORY DIRECT NEGOTIATION OF DISPUTES.  The Parties hope there will
be no disputes arising out of their business relationship.  However, if a claim
of breach, nonperformance, nonpayment, repudiation or other dispute should arise
related to or connected with this Agreement or any transactions between the
Parties (a "Dispute"), then the Parties agree to attempt to informally resolve
the Dispute by Direct Negotiation before initiating any claim related to such
Dispute in a court of competent jurisdiction.  "Direct Negotiation," as used
herein, shall mean a meeting (held either by telephone or in-person) between
senior business principals designated by each Party who have full authority to
address and resolve the Dispute.  Direct Negotiation is a prerequisite to
litigation involving all Disputes between the Parties except that either Party
may proceed directly to a court of law or equity to seek emergency injunctive
relief or remedy any safety concerns.  To initiate Direct Negotiation, the
complaining Party shall make a written demand on the other by certified mail to
the primary address of record and identify therein the nature of the Dispute and
all issues which, in the opinion of the complaining Party, need to be resolved
to restore the business relationship.  Any Disputes not expressly raised in this
notice for Direct Negotiation are waived with respect to subsequent litigation
unless such Disputes are


                                          15
<PAGE>

subsequently submitted to Direct Negotiation.  The Direct Negotiation shall take
place during the thirty (30) days following the date of receipt of the demand,
at a time and place agreed to by the business principals, and each Party agrees
to negotiate in good faith in an attempt to resolve the Dispute.  The Parties
agree to exchange relevant information and cooperate in good faith to resolve
the Dispute under this provision and to that end, the non-complaining Party
shall issue a statement which addresses the complaining Party's identified
Dispute and/or raises additional issues for resolution prior to the Direct
Negotiation.  If the Dispute remains unresolved following Direct Negotiation or
if the Direct Negotiation is not completed within the specified 30-day time
period, then the moving party may issue a fifteen (15) day written notice, and
if the Direct Negotiation does not resolve the Dispute or is not completed
within the specified 15-day period, then the aggrieved Parties are released to
file suit if they choose to further pursue the Dispute.

     IN WITNESS WHEREOF, the parties have executed this Agreement as of the date
first hereinabove set forth.

GENERAL NUTRITION CORPORATION           GALAGEN INC.

By:       /s/ John P. Troup             By:     /s/ Gregg A. Waldon
         ----------------------                -----------------------------

Name:     John P. Troup                 Name:   Gregg A. Waldon
         ----------------------                -----------------------------

Its:      Vice President                Its:    Vice President, Chief
         ----------------------                -----------------------------
                                                Financial Officer, Treasurer
                                               -----------------------------
                                                and Secretary
                                               -----------------------------

GENERAL NUTRITION PRODUCTS, INC.

By:     /s/ James M. Sander
       ------------------------

Name:   James M. Sander
       ------------------------

Its:    Vice President
       ------------------------


                                          16

<PAGE>


                                                                 EXHIBIT 11.1
GALAGEN INC.

STATEMENT RE:  COMPUTATION OF PER SHARE EARNINGS (LOSS)

<TABLE>
<CAPTION>
                                                           FOR THE YEAR ENDED DECEMBER 31
                                                    ------------------------------------------
                                                        1998           1997           1996
                                                    ------------   -----------   -------------
<S>                                                 <C>            <C>           <C>
BASIC LOSS PER SHARE:

Weighted average shares outstanding                   8,067,564      7,184,722      6,604,902
                                                    ------------   -----------   -------------
                                                    ------------   -----------   -------------
Net loss applicable to common stockholders          $(4,520,229)   $(5,635,134)  $(14,783,591)
                                                    ------------   -----------   -------------
                                                    ------------   -----------   -------------
Basic net loss per share applicable to common 
  stockholders                                            $(.56)         $(.78)        $(2.24)
                                                    ------------   -----------   -------------
                                                    ------------   -----------   -------------

DILUTED LOSS PER SHARE:

Weighted average shares outstanding                   8,067,564      7,184,722      6,604,902
Dilutive potential common shares                              -              -              -
                                                    ------------   -----------   -------------
Total                                                 8,067,564      7,184,722      6,604,902
                                                    ------------   -----------   -------------
                                                    ------------   -----------   -------------
Net loss applicable to common stockholders          $(4,520,229)   $(5,635,134)  $(14,783,591)
                                                    ------------   -----------   -------------
                                                    ------------   -----------   -------------
Diluted net loss per share applicable to common 
  stockholders                                            $(.56)         $(.78)        $(2.24)
                                                    ------------   -----------   -------------
                                                    ------------   -----------   -------------
</TABLE>



<PAGE>


                                                           EXHIBIT 13.1

                                  GALAGEN INC.
                         INDEX TO FINANCIAL INFORMATION
                                      1998

<TABLE>
<CAPTION>
                                                                                                                     PAGE
                                                                                                                     ----
<S>                                                                                                                  <C>
Management's Discussion and Analysis of Financial Condition and Results of Operations..............................     1
Quantitative and Qualitative Disclosures About Market Risk.........................................................     5
Balance Sheets.....................................................................................................     6
Statements of Operations...........................................................................................     7
Statement of Changes in Stockholders' Equity.......................................................................     8
Statements of Cash Flows...........................................................................................    10
Notes to Financial Statements......................................................................................    11
Report of Independent Auditors.....................................................................................    23
Selected Financial Data............................................................................................    24
Market for Registrant's Common Equity and Related Stockholder Matters..............................................    26
</TABLE>

<PAGE>

          MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
                          AND RESULTS OF OPERATIONS


FORWARD-LOOKING STATEMENTS

     The information presented in this Annual Report to Stockholders for the 
year ended December 31, 1998 (the "Annual Report") contains forward-looking 
statements within the meaning of the safe harbor provisions of Section 21E of 
the Securities Exchange Act of 1934, as amended (the "Exchange Act").  Such 
statements are subject to risks and uncertainties, including those discussed 
below under "Disclosure Regarding Forward-Looking Statements" and in the 
Company's Annual Report on Form 10-K for the year ended December 31, 1998 
("Form 10-K") under "Risk Factors", that could cause actual results to differ 
materially from those projected.  Because actual results may differ, readers 
are cautioned not to place undue reliance on these forward-looking statements.

GENERAL

     GalaGen's mission is to become the leading presence in foods, beverages 
and dietary supplements that help enhance the immune system. To accomplish 
this mission, the Company is focusing its efforts on channels that demand 
immune-enhancing benefits in certain segments of the consumer food and 
beverage products market and in certain segments of the clinical nutrition 
products markets. A critical factor for success of the Company is its 
immune-enhancing ingredient which is derived from colostrum, the highly 
nutritious first milk from a dairy cow after its calf is born, which has been 
branded Proventra-TM-Brand Natural Immune Components ("Proventra"). The 
primary immune-enhancing components of Proventra are antibodies, which are 
proteins that enhance the body's immune system to protect against harmful 
pathogens.  Secondary immune-enhancing components of Proventra providing 
further disease resistance are proteins, such as lactoferrin, as well as 
multiple vitamins and minerals. The Company, in conjunction with strategic 
partners, continues to expand applications for its technology and is 
developing a portfolio of Proventra-based products that target the needs 
of consumers and the healthcare market.

     In  December 1998, the Company acquired a developed line of critical 
care enteral nutrition products and formulas from Nutrition Medical, Inc. 
("NMI"). These products are being sold to the hospital and home healthcare 
industries. The Company is researching ways in which to incorporate certain 
of its immune-enhancing ingredients into selected products acquired from NMI 
to provide additional proprietary protection and added benefits that are not 
currently available in that market segment.
          
RESULTS OF OPERATIONS

YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996

     GENERAL.  The net loss applicable to common stockholders decreased by 
$1,114,905, or 19.8%, in 1998 to $4,520,229 from $5,635,134 in 1997 and 
decreased $9,148,457, or 61.9%, in 1997 from $14,783,591 in 1996. The 
decrease in 1998 was primarily due to increased revenue from the Company's 
critical care product line acquired from NMI, increased product development 
revenue related to a license agreement with Wyeth-Ayerst, decreased product 
development costs due to the discontinuation of the pharmaceutical program 
and decreased product development expense due to the receipt of a fee 
received from the re-licensing of previously licensed technology offset by 
increased selling, marketing and general and administrative expense in 
support of the consumer and clinical nutrition product development programs 
described above.  The decrease in 1997 was due primarily to the non-cash 
charge to earnings in April 1996 of $7,296,844 for a preferred stock 
dividend, as described below, relating to the value of additional shares 
issued to holders of certain preferred stock upon conversion into Common 
Stock at the closing of the Company's initial public offering (the 
"Offering"), which occurred in April 1996.


                                       1

<PAGE>

     REVENUES.  In 1998 revenues of $876,079 consisted of approximately 
$584,000 in sales of the Company's critical care nutrition products, 
approximately $32,000 in sales of the Company's Proventra product and 
approximately $260,000 of product development revenue relating to a license 
and research collaboration agreement with  Wyeth-Ayerst (see also Note 6 of 
Notes to the Financial Statements).

     COST OF GOODS SOLD.  For 1998 the cost of goods sold was $244,141, which 
consisted of approximately $228,000 from the critical care nutrition product 
sales and approximately $16,000 related to the Proventra product sales.

     SELLING, GENERAL AND ADMINISTRATIVE EXPENSES.  Selling, general and 
administrative expenses increased $694,519, or 45.1%, in 1998 to $2,235,362 
from $1,540,843 in 1997 and increased $60,347, or 4.1%, in 1997 from 
$1,480,496 in 1996.  The increase in 1998 is due to increased sales, 
marketing and personnel expense for the Company's consumer and critical care 
nutrition products of approximately $739,000 and increased shareholder 
relations expense of approximately $42,000 offset by decreased insurance 
costs of approximately $40,000, decreased financing expenses of approximately 
$24,000, and decreased legal expenses of approximately $22,000 .  The 
increase in 1997 is due primarily to increased public reporting and 
shareholder relations expense of approximately $75,000 and increased 
insurance costs of approximately $68,000 offset by decreased outside 
consulting expense of approximately $83,000.  

     PRODUCT DEVELOPMENT EXPENSES.  Expenses for product development 
decreased $1,845,791, or 49.1%, in 1998 to $1,914,295 from $3,760,086 in 1997 
and decreased $1,497,534, or 28.5%, in 1997 from $5,257,620 in 1996. 
Approximately $852,000 of the decrease in 1998 was due to the decreased 
development expenses related to the terminated pharmaceutical programs, 
approximately $684,000 of the decrease was due to decreased associated 
personnel and consulting expense, approximately $250,000 of the decrease was 
related to the fee received from the re-licensing of previously licensed 
technology, which was offset against product development expense, and 
approximately $60,000 of the decrease was from decreases in other program 
expenses. The decrease in 1997 was due primarily to decreased expenses 
associated with the pharmaceutical program of approximately $1,680,000 and 
decreased personnel and administration expenses of approximately $280,000 
offset primarily by increased manufacturing facility expenses of 
approximately $262,000 and increased nutritional product development expense 
of approximately $200,000.

     DEPRECIATION AND AMORTIZATION.  Depreciation and amortization increased 
$166,585, or 27.7%, in 1998 to $767,474 from $600,889 and increased $192,026, 
or 47.0%, in 1997 from $408,863 in 1996.  The increase in 1998 was due 
primarily to increased amortization of warrants issued for services of 
approximately $168,000 and increased deferred expense amortization of 
approximately $113,000 offset by decreased deferred compensation amortization 
of approximately $88,000 and decreased depreciation expense of approximately 
$26,000.  In 1997 the increase was due to increased depreciation expense of 
approximately $196,000, which was primarily depreciation on the Company's 
completed manufacturing facility, and increased warrant amortization of 
approximately $62,000 offset by decreased deferred compensation amortization 
of approximately $66,000.     

     INTEREST INCOME.  Interest income for 1998 decreased $110,315, or 
24.6%, to $338,007 from $448,322 in 1997 and decreased $157,226, or 26.0%, 
from $605,548 in 1996. The decreases were primarily attributable to the 
decreased levels of investable funds.

     INTEREST EXPENSE.  Interest expense increased $391,405, or 215.5%, in 
1998 to $573,043 from $181,638 in 1997 and decreased $763,678, or 80.8%, from 
$945,316 in 1996. In 1998 approximately $465,000 of the interest expense was 
the amortization of the value of warrants plus the value of the discount in 
connection with the convertible debentures the Company issued in November 
1997 (see Note 8 in Notes to the Financial Statements) and approximately 
$108,000 was line of credit interest expense (see Note 7 in Notes to the 
Financial Statements).  Interest expense for 1997 consisted primarily of line 
of credit interest expense of approximately $92,000 and amortization of the 
value of warrants plus the value of the discount in connection with 
convertible debentures of approximately $82,000.  Interest expense for 1996 
was due primarily to warrants valued at $768,064 which were issued to 
guarantors of a line of credit for the Company and to 


                                       2

<PAGE>

purchasers of the Company's promissory notes and to interest over a period of 
approximately three months on the convertible promissory notes (the 
"Convertible Promissory Notes") issued by the Company.  The Convertible 
Promissory Notes converted into Common Stock upon the closing of the Offering.

     PREFERRED STOCK DIVIDEND.  The non-cash preferred stock dividend of 
$7,296,844 in 1996 related to the value of additional Common Stock received 
by the holders of Convertible Promissory Notes, Series E and Series F-1 
Preferred Stock upon the conversion of such securities into Common Stock at 
the closing of the Offering (the Convertible Promissory Notes converting 
first into Series D Preferred Stock which in turn converted immediately into 
Common Stock at the closing).  The Convertible Promissory Notes and the 
Series D, Series E and Series F-1 Preferred Stock provided that their 
conversion prices be automatically adjusted to reflect the lower of their 
currently effective conversion price or 70% of the Offering price. 

LIQUIDITY AND CAPITAL RESOURCES; CASH FLOW ANALYSIS

     The Company was incorporated in March 1992.  On July 24, 1992, Procor, 
the Company's predecessor, was merged with and into the Company (the 
"Procor-GalaGen Merger").  At the time of the Procor-GalaGen Merger, Procor 
was a wholly-owned subsidiary of Land O'Lakes.  Since the Company's inception 
through December 31, 1998, investments in the Company have totaled 
approximately $53.4 million, including approximately $7.1 million of 
inter-company obligations payable to Land O'Lakes which were forgiven and 
recorded as contributed capital at the time of the Procor-GalaGen Merger, 
$17.9 million from the Offering (after deducting underwriting discounts and 
offering expenses) and approximately $28.4 million from private placements of 
equity and convertible debt and from conversion of accrued interest on such 
debt and the exercise of stock options and warrants. The Company has invested 
funds received in the Offering and private placements in investment-grade, 
interest-bearing obligations.

     Cash used in operating activities decreased by $2,511,294, or 41.5%, in 
1998 to $3,540,854 from $6,052,148 and decreased $83,664, or 1.4%, in 1997 
from $6,135,812 in 1996.  Cash used in operations went primarily to fund 
operating losses and was offset slightly by changes in operating assets and 
liabilities.

     The Company redeemed $7,511,619 of available-for-sale securities in 
1998 and invested $13,276 in 1997 and $7,498,343 in 1996 in 
available-for-sale securities.  The Company invested $39,365 in 1998, 
$215,320 in 1997 and $1,264,342 in 1996 in equipment and tenant improvements 
related to the Company's manufacturing facility, the majority of which is 
leased (see Note 7 of Notes to the Financial Statements).  The Company 
invested $50,475 in 1998, $63,685 in 1997 and $193,012 in 1996 in lab 
equipment, computer equipment and software and furniture used primarily to 
support the Company's operations.  In 1998 the Company invested $141,363 in 
fixed assets and inventory received relating to the asset purchase agreement 
with NMI (see Note 5 in Notes to the Financial Statements).

     The Company converted it's previously established note payable, which 
was secured by certain fixed assets, into an operating lease in accordance 
with FAS 13 in June 1998 which calls for future minimum monthly payments of 
approximately $34,000 through May 2001 with a final payment of $165,000 in 
June 2001.  The Company's seven-year operating lease for manufacturing 
equipment requires annual payments of approximately $131,000 through 2003.  
Additionally, the Company's five-year lease agreement with Land O' Lakes for 
specified manufacturing space requires future annual payments of 
approximately $87,000 through June 2001 (see Note 10 in Notes to the 
Financial Statements).


                                       3

<PAGE>

     The Company anticipates that its existing resources and interest thereon 
will be sufficient to satisfy its anticipated cash requirements through 
approximately the first quarter of 2000. The Company's working capital and 
capital requirements will depend upon numerous factors, including the 
progress of the Company's market research, product development and ability to 
obtain partners with the appropriate manufacturing, sales, distribution and 
marketing capabilities.  The Company's capital requirements also will depend 
on the levels of resources devoted to the development of manufacturing 
capabilities, technological advances, the status of competitive products and 
the ability of the Company to establish partners or strategic alliances to 
provide funding to the Company for certain manufacturing, sales, product 
development and marketing activities.

     The Company expects to incur substantial additional marketing expense 
and product development expense.  Capital expenditures may be necessary to 
establish additional commercial scale manufacturing facilities.  The Company 
will need to raise substantial additional funds for longer-term product 
development, manufacturing and marketing activities that may be required in 
the future.  The Company's ability to continue funding its planned operations 
beyond the first quarter of 2000 is dependent upon its ability to generate 
product revenues or to obtain additional funds through equity or debt 
financing, strategic alliances, license agreements or from other financing 
sources.  A lack of adequate revenues or funding could eventually result in 
the insolvency or bankruptcy of the Company.  At a minimum, if adequate funds 
are not available, the Company may be required to delay or to eliminate 
expenditures for certain of its product development efforts or to license to 
third parties the rights to commercialize products or technologies that we 
would otherwise seek to develop itself. Because of the Company's significant 
long-term capital requirements, it may seek to raise funds when conditions 
are favorable, even if the Company does not have an immediate need for such 
additional capital at such time.  If the Company has not raised funds prior 
to when its needs for funding become immediate, the Company may be forced to 
raise funds when conditions are unfavorable, which could result in 
significant dilution for current stockholders.

YEAR 2000 ISSUES

     The Company began the process of assessing its risks associated with 
Year 2000 date conversion in 1998.  This assessment included three main areas:

     -    the business hardware and software applications, mainly certain
          accounting applications and   office network, the Company's
          Information Technology ("IT"),

     -    manufacturing facilities and

     -    external third party business partners or suppliers.  

     Prior to the asset acquisition of NMI's critical care nutrition 
products, the Company completed its assessment and concluded that the Year 
2000 risk was focused mainly in the area of its business computer hardware 
and computer software applications. Subsequent to the NMI asset purchase, the 
Company has undertaken a reassessment and has determined that the risk 
associated with non-compliant external business partners and suppliers has 
significantly increased.  The assessment has been completed for the IT and 
manufacturing facilities and will be completed for the third party partners 
and suppliers in mid 1999.

     The Company has addressed these issues by:

     -    authorizing the installation of new network server hardware and
          software, specifically for its accounting applications and office
          network.  This remediation process has begun and is anticipated to be
          completed in early 1999 with total costs of approximately $60,000, of
          which approximately $48,000 has been expensed in 1998.  The Company
          has contracted this work to outside parties.  The manufacturers of the
          hardware and software have stated that these products are Year 2000
          compliant.  In planning for the worst case scenarios, the Company has
          addressed this issue in its plan.  The Company believes that its
          hardware and software systems for its business will be operational for
          Year 2000, but it may experience isolated incidences of non-


                                       4

<PAGE>

          compliance.  The testing of the newly installed hardware and
          software, along with the Company's older hardware and software, is
          anticipated to begin upon completion of the new installation 
          described above and is anticipated to conclude shortly thereafter; and
        
     -    identifying its key business partners and suppliers, particularly
          relating to its critical care nutrition business, and assessing their
          readiness for Year 2000 to mitigate the risk to the Company if they
          are not Year 2000 compliant.  The Company has its critical care
          nutrition products manufactured by third parties.  If certain vendors,
          including these critical care product manufacturers,  are unable to
          deliver product on a timely basis due to their own Year 2000 issues,
          the Company anticipates that there will be other companies who will be
          able to deliver such product on a timely basis.  Upon completion of
          this assessment, the Company will determine whether any remediation is
          needed.  The Company also recognizes the risks to other key suppliers
          in utilities, communications, banking and government are not ready for
          Year 2000, but does not believe the Company will be materially
          adversely impacted.  

     The Company's manufacturing facility, completed and operational in 
mid-1997, has been Year 2000 compliant since inception and no further work is 
considered necessary.  The most reasonably likely worst case scenario would 
be the inability of the Company to have its critical care nutrition products 
manufactured on a timely basis which could result in significantly decreased 
revenues.  The Company is currently in the process of developing its 
contingency plans for each of its three main areas and should have them 
completed in mid-1999.  

DISCLOSURE REGARDING FORWARD-LOOKING STATEMENTS

     This Annual Report to Stockholders contains certain forward looking 
statements within the meaning of Section 21E of the Exchange Act.  Such 
forward-looking statements are based on the beliefs of the Company's 
management as well as on assumptions made by and information currently 
available to the Company at the time such statements were made.  When used in 
this Annual Report, the words "anticipate", "believe", "estimate", "expect", 
"intend" and similar expressions, as they relate to the Company, are intended 
to identify such forward-looking statements.  Although the Company believes 
these statements are reasonable, readers of this Annual Report should be 
aware that actual results could differ materially from those projected by 
such forward-looking statements as a result of the risk factors listed below 
and set forth in the Company's Form 10-K under the caption "Risk Factors."  
Readers of this Annual Report should consider carefully the factors listed 
below and under the caption "Risk Factors" in the Company's Form 10-K, as 
well as the other information and data contained in this Annual Report.  The 
Company cautions the reader, however, that such list of factors under the 
caption "Risk Factors" in the Company's Form 10-K and listed below may not be 
exhaustive and that those or other factors, many of which are outside of the 
Company's control, could have a material adverse effect on the Company and 
its results of operations.  Factors that could cause actual results to differ 
include, without limitation, the Company's ability to generate sufficient 
working capital and obtain necessary financing to meet capital requirements, 
loss of Nasdaq National Listing, the Company's ability to form strategic 
alliances with marketing and distribution partners, the Company's exposure to 
product liability claims, consumers' perception of product safety and 
quality, the Company's reliance on flawed market research, potential 
competitors that are larger and financially stronger, the Company's ability 
to receive regulatory approval for its products and the Company's ability to 
manufacture an acceptable product on a commercial scale.  All forward-looking 
statements attributable to the Company or persons acting on its behalf are 
expressly qualified in their entirety by the cautionary statements set forth 
hereunder and under the caption "Risk Factors" in the Company's Form 10-K.

         QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

     The Company's market risk is unlikely to have a material adverse effect 
on the Company's business, results of operations or financial condition.


                                      5

<PAGE>

                                 GALAGEN INC.

                                BALANCE SHEETS

                                    ASSETS

<TABLE>
<CAPTION>
                                                                                                      DECEMBER 31
                                                                                           --------------------------------
                                                                                                 1998             1997
                                                                                           --------------------------------
<S>                                                                                        <C>              <C>
Current assets:
  Cash and cash equivalents...........................................................     $ 4,081,733      $   155,908
  Available-for-sale securities.......................................................               -        7,511,619
  Accounts receivable, net of allowance of $14,020 in 1998 ...........................         314,579                -
  Inventory...........................................................................         303,150                -
  Prepaid expenses....................................................................         197,994          196,672
                                                                                           --------------   ---------------
Total current assets..................................................................       4,897,456        7,864,199

      
Property and equipment................................................................         671,796        1,869,974
  Less accumulated depreciation.......................................................        (270,418)        (363,355)
                                                                                           --------------   ---------------
                                                                                               401,378        1,506,619

Deferred expenses.....................................................................         324,659          158,953
Customer list.........................................................................         450,000                -
Goodwill..............................................................................         219,847                -
                                                                                           --------------   ---------------
                                                                                               994,506          158,953

  
Total assets..........................................................................     $ 6,293,340      $ 9,529,771
                                                                                           --------------   ---------------
                                                                                           --------------   ---------------
</TABLE>

                      LIABILITIES AND STOCKHOLDERS' EQUITY
<TABLE>
<S>                                                                                        <C>              <C>
Current liabilities:
  Accounts payable....................................................................     $    641,922      $    559,498
  Development contract advance........................................................          290,089                -
  Note payable........................................................................               -            238,250
  Accrued expenses....................................................................           46,903            38,129
  Convertible notes- net of discount of $6,667 in 1998................................          193,333                 -
                                                                                           --------------   ---------------
Total current liabilities.............................................................        1,172,247           835,877

Commitments

Convertible notes, net of discount of $428,182 in 1997................................                -         1,071,818
Note payable, long term portion.......................................................                -           923,998
Other long-term liabilities...........................................................           45,000            45,000

Stockholders' equity:
  Preferred stock, $.01 par value:
     Authorized shares - 15,000,000
     Issued and outstanding shares - none in 1998 and 1997............................                -                 -
  Common stock, $.01 par value:
     Authorized shares - 40,000,000
     Issued and outstanding shares - 8,948,446 in 1998; 7,234,974 in 1997.............           89,484            72,350
  Additional paid-in capital..........................................................       62,386,292        59,669,586
  Accumulated deficit ................................................................      (57,339,283)      (52,819,054)
  Deferred compensation...............................................................          (60,400)         (269,804)
                                                                                           --------------   ---------------
  Total stockholders' equity..........................................................        5,076,093         6,653,078
                                                                                           --------------   ---------------

Total liabilities and stockholders' equity............................................     $  6,293,340      $  9,529,771
                                                                                           --------------   ---------------
                                                                                           --------------   ---------------
</TABLE>


                             See accompanying notes.


                                       6

<PAGE>

                                  GALAGEN INC.


                            STATEMENTS OF OPERATIONS
<TABLE>
<CAPTION>
                                                                   YEAR ENDED DECEMBER 31
                                                        ----------------------------------------------
                                                             1998           1997           1996
                                                        ----------------------------------------------
<S>                                                     <C>              <C>             <C>
Revenues:
 Product sales.......................................       $  616,168   $          -    $         -
 Product licensing and development revenues..........          259,911              -              -
                                                        --------------   ------------    -----------
                                                               876,079                             -

Operating expenses:
 Cost of goods sold..................................          244,141              -              -
 Selling, general and administrative.................        2,235,362      1,540,843      1,480,496
 Product development.................................        1,914,295      3,760,086      5,257,620
 Depreciation and amortization.......................          767,474        600,889        408,863
                                                        --------------   ------------    -----------
                                                             5,161,272      5,901,818      7,146,979
                                                        --------------   ------------    -----------
Operating loss.......................................       (4,285,193)    (5,901,818)    (7,146,979)

Interest income......................................          338,007        448,322        605,548
Interest expense.....................................         (573,043)      (181,638)      (945,316)
                                                        ---------------  ------------    ------------
Net loss for the period..............................       (4,520,229)    (5,635,134)    (7,486,747)
Less preferred stock dividend .......................                -              -     (7,296,844)
                                                        ---------------  ------------    ------------
Net loss applicable to common stockholders...........   $   (4,520,229)  $ (5,635,134)   $(14,783,591)
                                                        ---------------  ------------    ------------
                                                        ---------------  ------------    ------------

Net loss per share applicable to common stockholders    $         (.56)  $       (.78)$        (2.24)
  Basic and Diluted..................................

Weighted average number of common shares outstanding
  Basic and Diluted..................................        8,067,564      7,184,722      6,604,902
</TABLE>


                             See accompanying notes.


                                       7

<PAGE>

                                  GALAGEN INC.


                  STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY

<TABLE>
<CAPTION>
                                                             SERIES A                   SERIES B                 SERIES C
                                                         PREFERRED STOCK            PREFERRED STOCK          PREFERRED STOCK
                                                    --------------------------- ------------------------- -----------------------
                                                       SHARES        AMOUNT       SHARES       AMOUNT       SHARES      AMOUNT
                                                    ------------- ------------- ------------ ------------ ----------- -----------
<S>                                                 <C>           <C>           <C>          <C>          <C>         <C>
Balance at December 31, 1995.....................     2,500,000       $25,000     1,234,748     $12,347     551,000     $5,510
    Sale of Series E Preferred Stock.............
    Issuance of Series F-1 Preferred Stock.......
    Warrant valuation for line of credit and notes
    Warrant valuation for Convertible Promissory
       Notes.....................................
    Conversion of Series A Preferred Stock.......    (2,500,000)      (25,000)
    Conversion of Series B Preferred Stock.......                                (1,234,748)    (12,347)
    Conversion of Series C Preferred Stock.......                                                          (551,000)    (5,510)
    Conversion of Series F-1 Preferred Stock.....
    Conversion of Series E Preferred Stock.......
    Conversion of Convertible Promissory Notes,
     net of financing costs of $131,010..........
    Initial public offering, net of offering
     costs of $2,078,225.........................
    Preferred stock dividend.....................
    Stock issued through Employee Stock Purchase
       Plan......................................
    Amortization of deferred compensation........
    Deferred compensation adjustment, canceled
       options...................................
    Exercise of stock options....................
    Net loss for the year........................
                                                    ------------- ------------- ------------ ------------ ----------- -----------
Balance at December 31, 1996.....................             -             -             -           -           -          -
    Amortization of deferred compensation........
    Deferred compensation adjustment, canceled
       options...................................
    Exercise of stock options....................
    Common stock issued for services.............
    Discount valuation for convertible 
       debentures................................
    Valuation of issued options and warrants......
    Warrant valuation for note payable............
    Stock issued through Employee Stock Purchase
       Plan......................................
    Net loss for the year........................
                                                    ------------- ------------- ------------ ------------ ----------- -----------
Balance at December 31, 1997.....................             -             -             -           -           -          -
    Amortization of deferred compensation........
    Deferred compensation adjustment, canceled
       options...................................
    Exercise of stock options and warrants.......
    Conversion of convertible debentures.........
    Valuation of issued warrants.................
    Common stock issued for asset purchase.......
    Stock issued through Employee Stock Purchase
       Plan......................................
    Net loss for the year........................
                                                    ------------- ------------- ------------ ------------ ----------- -----------
Balance at December 31, 1998.....................             -        $    -             -      $    -           -      $   -
                                                    ------------- ------------- ------------ ------------ ----------- -----------
                                                    ------------- ------------- ------------ ------------ ----------- -----------
</TABLE>


                             See accompanying notes.


                                       8

<PAGE>

<TABLE>
<CAPTION>

                                                          SERIES F-1              SERIES E
                                                        PREFERRED STOCK         PREFERRED STOCK         COMMON STOCK      
                                                    ----------------------- ---------------------- ---------------------- 
                                                       SHARES       AMOUNT      SHARES     AMOUNT     SHARES      AMOUNT  
                                                    ------------ ---------- ------------ --------- ----------- ---------- 
<S>                                                 <C>          <C>        <C>          <C>       <C>         <C>        
Balance at December 31, 1995.....................       17,143       $171      338,461     $3,385   1,952,252    $19,522  
    Sale of Series E Preferred Stock.............                               46,154        461                         
    Issuance of Series F-1 Preferred Stock.......       17,144        171                                                 
    Warrant valuation for line of credit and notes                                                                        
    Warrant valuation for Convertible Promissory    
       Notes.....................................                                                                         
    Conversion of Series A Preferred Stock.......                                                     677,063      6,771  
    Conversion of Series B Preferred Stock.......                                                     543,413      5,434  
    Conversion of Series C Preferred Stock.......                                                     248,758      2,488  
    Conversion of Series F-1 Preferred Stock.....      (34,287)      (342)                             85,717        857  
    Conversion of Series E Preferred Stock.......                             (384,615)    (3,846)    178,568      1,786  
    Conversion of Convertible Promissory Notes,     
     net of financing costs of $131,010..........                                                   1,434,495     14,345  
    Initial public offering, net of offering        
     costs of $2,078,225.........................                                                   2,000,000     20,000  
    Preferred stock dividend.....................                                                                         
    Stock issued through Employee Stock Purchase    
       Plan......................................                                                       3,642         36  
    Amortization of deferred compensation........                                                                         
    Deferred compensation adjustment, canceled      
       options...................................                                                                         
    Exercise of stock options....................                                                      39,861        399  
    Net loss for the year........................                                                                         
                                                    ------------ ---------- ------------ --------- ----------- ---------- 
Balance at December 31, 1996.....................            -          -            -          -   7,163,769     71,638  
    Amortization of deferred compensation........                                                                         
    Deferred compensation adjustment, canceled      
       options...................................                                                                         
    Exercise of stock options....................                                                      64,703        647  
    Common stock issued for services.............                                                       1,493         15  
    Discount valuation for convertible                                                                                    
       debentures................................                                                                         
    Valuation of issued options and warrants.....                                                                         
    Warrant valuation for note payable...........  
    Stock issued through Employee Stock Purchase   
       Plan......................................                                                       5,009         50  
    Net loss for the year........................                                                                         
                                                    ------------ ---------- ------------ --------- ----------- ---------- 
Balance at December 31, 1997.....................            -          -            -          -   7,234,974     72,350  
    Amortization of deferred compensation........                                                                         
    Deferred compensation adjustment, canceled                                                                            
       options...................................                                                                         
    Exercise of stock options and warrants.......                                                     111,325      1,113  
    Conversion of convertible debentures.........                                                   1,260,073     12,601  
    Valuation of issued warrants.................                                                                         
    Common stock issued for asset purchase.......                                                     318,800      3,188  
    Stock issued through Employee Stock Purchase                                                                          
       Plan......................................                                                      23,274        232  
    Net loss for the year........................                                                                         
                                                    ------------ ---------- ------------ --------- ----------- ---------- 
Balance at December 31, 1998.....................            -   $      -            -   $      -   8,948,446  $  89,484  
                                                    ------------ ---------- ------------ --------- ----------- ---------- 
                                                    ------------ ---------- ------------ --------- ----------- ---------- 

                                                                                                                
                                                       ADDITIONAL     DEFERRED                                  
                                                       PAID-IN        COMPEN-      ACCUMULATED                  
                                                        CAPITAL        SATION         DEFICIT         TOTAL     
                                                     ------------- -------------- -------------- -------------- 
<S>                                                  <C>           <C>            <C>            <C>            
Balance at December 31, 1995.....................     $23,812,105   $(1,180,734)   $(32,400,329)  $(9,703,023)  
    Sale of Series E Preferred Stock.............         149,539                                     150,000   
    Issuance of Series F-1 Preferred Stock.......         299,849                                     300,020   
    Warrant valuation for line of credit and notes        768,064                                     768,064   
    Warrant valuation for Convertible Promissory                                                                
       Notes.....................................         (68,474)                                    (68,474)  
    Conversion of Series A Preferred Stock.......          18,229                                           -   
    Conversion of Series B Preferred Stock.......           6,913                                           -   
    Conversion of Series C Preferred Stock.......           3,022                                           -   
    Conversion of Series F-1 Preferred Stock.....            (515)                                          -   
    Conversion of Series E Preferred Stock.......            2060                                           -   
    Conversion of Convertible Promissory Notes,                                                                 
     net of financing costs of $131,010..........       8,918,954                                   8,933,299   
    Initial public offering, net of offering                                                                    
     costs of $2,078,225.........................      17,901,775                                  17,921,775   
    Preferred stock dividend.....................       7,296,844                                   7,296,844   
    Stock issued through Employee Stock Purchase                                                                
       Plan......................................          13,512                                      13,548   
    Amortization of deferred compensation........                       340,066                       340,066   
    Deferred compensation adjustment, canceled                                                                  
       options...................................        (261,200)      261,200                             -   
    Exercise of stock options....................          65,977                                      66,376   
    Net loss for the year........................                                   (14,783,591)  (14,783,591)  
                                                     ------------- -------------- -------------- -------------- 
Balance at December 31, 1996.....................      58,926,654      (579,468)    (47,183,920)   11,234,904   
    Amortization of deferred compensation........                       273,864                       273,864   
    Deferred compensation adjustment, canceled                                                                  
       options...................................         (35,800)       35,800                             -   
    Exercise of stock options....................          79,004                                      79,651   
    Common stock issued for services.............          14,376                                      14,391   
    Discount valuation for convertible
       debentures................................         318,182                                     318,182   
    Valuation of issued options and warrants.....         280,450                                     280,450   
    Warrant valuation for note payable...........          78,800                                      78,800   
    Stock issued through Employee Stock Purchase                                                                
       Plan......................................           7,920                                       7,970   
    Net loss for the year........................                                    (5,635,134)   (5,635,134)  
                                                     ------------- -------------- -------------- -------------- 
Balance at December 31, 1997.....................      59,669,586      (269,804)    (52,819,054)    6,653,078   
    Amortization of deferred compensation........                       185,404                       185,404   
    Deferred compensation adjustment, canceled                                                                  
       options...................................         (24,000)       24,000                             -   
    Exercise of stock options and warrants.......         261,097                                     262,210   
    Conversion of convertible debentures.........       1,330,882                                   1,343,483   
    Valuation of issued warrants.................         488,750                                     488,750   
    Common stock issued for asset purchase.......         621,812                                     625,000   
    Stock issued through Employee Stock Purchase                                                                
       Plan......................................          38,165                                      38,397   
    Net loss for the year........................                                    (4,520,229)   (4,520,229)  
                                                     ------------- -------------- -------------- -------------- 
Balance at December 31, 1998.....................     $62,386,292      $(60,400)   $(57,339,283)  $ 5,076,093   
                                                     ------------- -------------- -------------- -------------- 
                                                     ------------- -------------- -------------- -------------- 
</TABLE>
                             See accompanying notes.


                                       9
<PAGE>

                                  GALAGEN INC.


                            STATEMENTS OF CASH FLOWS

<TABLE>
<CAPTION>
                                                                       YEAR ENDED DECEMBER 31
                                                            -------------------------------------------
                                                                 1998           1997            1996
                                                            -------------------------------------------
<S>                                                         <C>            <C>             <C>
OPERATING ACTIVITIES:
Net loss..................................................  $ (4,520,229)  $ (5,635,134)   $(14,783,591)
Adjustments to reconcile net loss to cash used in
  operating activities:
   Depreciation expense...................................       238,918        264,741          68,797
   Deferred expense amortization..........................       112,893              -               -
   Amortization of warrants issued for services...........       230,259         62,284         768,064
   Noncash interest cost of convertible debentures........       464,998         81,378               -
   Deferred compensation amortization.....................       185,404        273,864         340,066
 Preferred stock dividend ................................             -              -       7,296,844
 Stock issued for services and license agreement..........             -         14,391               -
 Changes in operating assets and liabilities:
     Inventory............................................      (237,634)             -               -
     Accounts receivable..................................      (314,579)             -               -
     Prepaid expenses.....................................       (82,171)       (31,738)         (5,571)
     Other assets.........................................             -              -         123,967
     Accounts payable and accrued expenses................       381,287     (1,081,934)         55,612
                                                             ------------   ------------    -----------
Net cash used in operating activities.....................                                 
                                                              (3,540,854)    (6,052,148)     (6,135,812)
                                                             ------------   ------------    -----------
INVESTING ACTIVITIES:
Purchase of property and equipment........................       (89,840)      (279,005)     (1,457,354)
Payment for asset purchase................................      (141,363)             -               -
Sale/purchase of available-for-sale securities, net.......     7,511,619        (13,276)     (7,498,343)
                                                             ------------   ------------    -----------
Net cash provided by(used in) investing activities........     7,280,416       (292,281)     (8,955,697)
                                                             ------------   ------------    -----------
FINANCING ACTIVITIES:
Proceeds from sale of common  stock, net of offering costs             -              -      17,921,775
Proceeds from sale of preferred stock ....................             -              -         450,020
Proceeds from common  stock options exercised.............       262,210         79,651          66,376
Proceeds from  borrowings from investors..................             -              -         500,000
Proceeds from convertible notes, net of issuance costs....             -      1,380,919               -
Net proceeds(payment) from(on) note payable...............      (114,344)     1,162,248               -
Payment to investors on borrowings........................             -              -        (500,000)
Proceeds from Employee Stock Purchase Plan................        38,397          7,970          13,548
                                                            -------------  ------------    -------------
Net cash provided by financing activities.................       186,263      2,630,788      18,451,719
                                                            ------------   ------------    ------------
Increase (decrease) in cash...............................     3,925,825     (3,713,641)      3,360,210
Cash and cash equivalents at beginning of year............       155,908      3,869,549         509,339
                                                            ------------   -------------   --------------
Cash and cash equivalents at end of year..................   $ 4,081,733   $    155,908     $ 3,869,549
                                                            ------------   -------------   --------------
                                                            ------------   -------------   --------------

SCHEDULE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Discount valuation for convertible debentures............    $         -   $    318,182     $         -
Valuation of issued options and warrants .................       488,750        359,250               -
Stock issued for asset purchase...........................       625,000              -               -
Conversion of note payable to operating lease.............     1,047,904              -               -
Deferred compensation adjustment, canceled options........        24,000         35,800         261,200
Conversion of convertible promissory notes plus related 
  accrued interest, to common stock.......................     1,343,483              -       8,864,825
</TABLE>


                             See accompanying notes.


                                       10

<PAGE>

                                    GALAGEN INC.
                                          
                                          
                           NOTES TO FINANCIAL STATEMENTS

1.   DESCRIPTION OF BUSINESS

     GalaGen Inc. is a nutritional products company that is utilizing its 
proprietary immune-enhancing ingredients and patented manufacturing processes 
to commercialize health-promoting foods and beverages. These immune-enhancing 
ingredients, including Proventra-TM- Brand Natural Immune Components 
("Proventra"), are comprised of antibodies and other proteins that are 
derived from the milk collected in the first few milkings of a dairy cow 
after its calf is born. The Company continues to expand applications for its 
technology and is developing a portfolio of immune-enhancing products that 
target the needs of consumers and the healthcare market.   In  December 1998, 
the Company acquired a developed line of critical care enteral nutrition 
products and formulas from Nutrition Medical, Inc. ("NMI"). These products 
are being sold to the hospital and home healthcare industries.  The Company 
operates in a single business segment.

2.   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

DEVELOPMENT STAGE 

     Prior to 1998 the Company was a development stage company.

USE OF ESTIMATES

     The preparation of financial statements in conformity with generally 
accepted accounting principles requires management to make estimates and 
assumptions that affect the amounts reported in the financial statements and 
accompanying notes. Actual results could differ from those estimates. 

RECLASSIFICATION

     Certain prior year amounts have been reclassified to conform with the 
current year presentation.

REVENUE RECOGNITION

     Revenue from product sales is recognized at the time of shipment.

PRODUCT DEVELOPMENT COSTS

     All product development costs are charged to operations as incurred.

NET LOSS PER SHARE

     Net loss per share is presented in accordance with the provisions of 
Statement of Financial Accounting Standards No. 128, EARNINGS PER SHARE 
("Statement 128").  Under Statement 128, basic earnings  per share is 
computed by dividing the net loss by the weighted average number of common 
shares outstanding for the year.  Diluted earnings per share reflects the 
potential dilution that could occur if securities or other contracts to issue 
common stock were exercised or converted into common stock and resulted in 
the issuance of common stock.  Basic and diluted earnings per share are the 
same in all years presented as all potential common shares were antidilutive. 


                                       11

<PAGE>

INCOME TAXES

     Income taxes are accounted for using the liability method. Deferred 
income taxes are provided for temporary differences between financial 
reporting and tax bases of assets and liabilities. 

CASH EQUIVALENTS

     Cash equivalents are available-for-sale and are carried at cost which 
approximates fair market value.

INVESTMENTS

     Investments in debt securities with a remaining maturity of more than 
three months at the date of purchase are classified as marketable securities. 
Management determines the appropriate classification of debt securities at 
the time of purchase and reevaluates such designation as of each balance 
sheet date. Debt securities were classified as available-for-sale as of 
December 31, 1997. The book value of the investments approximated their 
estimated market value. 

INVENTORY

     Inventories are stated at the lower of cost or market using the 
first-in, first-out method.  The Company evaluates the need for reserves 
associated with obsolete inventory as needed.  Inventory at December 31 
consisted of the following:

<TABLE>
<CAPTION>
                                                            1998
                                                     -------------------
  <S>                                                <C>
  Finished goods..................................     $        235,155
  Raw materials and supplies......................               67,995
                                                     -------------------
                                                       $        303,150
                                                     -------------------
                                                     -------------------
</TABLE>

PROPERTY AND EQUIPMENT

     Property and equipment are recorded at cost and depreciated on a 
straight-line basis over their estimated useful lives of three to seven 
years. 

IMPAIRMENT

     The Company evaluates its long-lived assets for impairment losses when 
indicators of impairment are present by comparing the non-discounted cash 
flows to the asset's carrying amount.  An impairment loss is recorded if 
necessary.  In management's opinion, no impairment exists on December 31, 
1998.

CUSTOMER LIST

     Customer list represents the value of the acquired customer database.  
The customer list is amortized over the useful life of the asset. 

GOODWILL 

     Goodwill represents the excess of purchase price and related costs over 
the value assigned to the net assets acquired. Goodwill is amortized on a 
straight-line basis over two-years because of the limited history of the 
product line acquired. 


                                       12

<PAGE>

STOCK BASED COMPENSATION

     The Company has adopted the disclosure-only provisions of Statement of 
Financial Accounting Standards No. 123, ACCOUNTING FOR STOCK BASED 
COMPENSATION ("Statement 123"), but applies Accounting Principles Board 
Opinion No. 25, ACCOUNTING FOR STOCK ISSUED TO EMPLOYEES ("APB 25"), and 
related interpretations in accounting for its stock plans.  Under APB 25, 
when the exercise price of stock options equals the market price of the 
underlying stock on the date of grant, no compensation expense is recognized.

3.   RELATED PARTY TRANSACTIONS

     During 1992, the Company entered into the following agreements with Land 
O'Lakes, which are still in effect: 

ROYALTY AGREEMENT

     The Company will pay to Land O'Lakes a royalty on net receipts from any 
product, other than infant formula, which is based on existing technology or 
technology improvements, as defined by the agreement.  The Company will pay 
an additional royalty on net receipts from infant formula based on existing 
or improved technology and an additional royalty on net receipts from infant 
formula based on new technology, as defined by the agreement.  This agreement 
will continue until terminated by both parties.  Royalty payments range from 
one to two percent of net receipts.

LICENSE AGREEMENT

     The Company has licensed to Land O'Lakes the rights to use the Company's 
existing technologies and technology improvements, as defined by the 
agreement, for Land O'Lakes' use in animal products, functional foods and 
infant formula. The Company received a lump sum license fee. The Company has 
agreed not to compete for fifteen years in the area of animal products and 
functional foods based on milk and colostrum based immunoglobulin technology. 
Land O'Lakes has agreed not to compete for fifteen years in the areas of 
prescription drugs and over-the-counter drugs regulated by the Food and Drug 
Administration. The term of this agreement is perpetual.

     In March 1997, Land O'Lakes granted a five-year license, an amendment to 
the license above, in the area of functional foods to use existing technology 
and future technology improvements in the development, formulation, 
manufacture, marketing, distribution and sale of kefir-based products, as 
defined in the granted license.  In consideration of granting the Company 
this license, Land O'Lakes will receive a royalty of five percent from food 
components or ingredients sold by the Company to be included in a kefir-based 
product and one percent of net receipts from a kefir-based finished product 
sold by the Company.

     In March 1998, the Company and Land O'Lakes signed an amended and 
restated license agreement in which the Company has significantly broadened 
its rights to develop and market functional foods.   Under the restated 
license agreement, the Company can use, improve, exploit, license or share 
existing technology, technology improvements and new technologies, as 
defined, in all areas except under certain "reserved food" and "first refusal 
food product" categories.

SUPPLY AGREEMENT

     The Company has entered into an agreement with Land O'Lakes whereby the 
Company will purchase and Land O'Lakes will supply, at their option, all of 
the Company's commercial requirements for colostrum and milk. As part of this 
agreement, Land O'Lakes will provide expertise in dairy herd selection, 
on-farm management, membership relations and procurement to the Company for 
the manufacture of antibody material. The agreement will last for ten years 
and Land O'Lakes, at its sole discretion, has the option to extend the 
agreement for an additional ten years. 


                                       13

<PAGE>

MASTER SERVICES AGREEMENT

     The Company has entered into an agreement with Land O'Lakes whereby the 
Company may purchase services from Land O'Lakes for certain administrative 
and research and development activities.  This agreement will enable the 
Company to access expertise, on an as-needed basis, from Land O'Lakes.  The 
agreement terminated on December 31, 1992, but has been renewed annually and 
is currently extended through December 31, 1999.  The Company was charged 
approximately $375,000, $442,000 and $682,000 in 1998, 1997 and 1996, 
respectively, in accordance with the Master Services Agreement.

     Subsequent to 1992, the Company and Land O'Lakes have entered into other 
related party agreements as noted below:

     In December 1995 and January 1996, Land O'Lakes purchased 169,230 shares 
of Series E preferred stock at $3.35 per share.

     In January 1996, the Company entered into a $2.7 million line of credit 
agreement with a commercial bank, which expired with the closing of the 
Company's initial public offering (the "Offering").  Loans under this line of 
credit were guaranteed by six parties and the guarantee was collateralized by 
letters of credit posted by them in the aggregate amount of $2.7 million.  In 
consideration for the guarantees and letters of credit posted by these 
parties, the Company issued warrants to purchase an initial aggregate of 
162,011 shares of common stock at $7.00 per share. In connection with this 
transaction Land O'Lakes guaranteed $500,000 of the $2.7 million line of 
credit, and in exchange received a warrant to purchase 30,002 shares of 
common stock at $7.00 per share. See Note 9.

     In  June 1996, the Company entered into a five-year lease agreement with 
Land O'Lakes for specified space within the Land O'Lakes facility in 
connection with the Company's manufacturing facility.  See Note 10.

     In December 1996, the Company entered into an equipment operating lease 
which was guaranteed by Land O'Lakes.  See Note 10. 

4.   STOCK 

INITIAL PUBLIC OFFERING

     GalaGen Inc. consummated an initial public offering on April 1, 1996, 
which consisted of 2,000,000 shares of common stock at a $10 per share price 
to the public.  All of the Company's preferred stock mandatorily converted 
into common stock immediately prior to the closing of the Offering.  The 
2,500,000 shares of Series A preferred stock, 1,234,748 shares of Series B 
preferred stock and 551,000 shares of Series C preferred stock that were 
outstanding prior to the Offering were converted into 677,063, 543,413 and 
248,758 shares of common stock, respectively, upon the closing of the 
Offering. The $8,275,000 of Convertible Promissory Notes to investors, plus 
accrued interest, that were outstanding prior to the Offering converted into 
shares of Series D preferred stock and simultaneously into 1,434,495 shares 
of common stock upon the closing of the Offering.  The 338,461 shares of 
Series E preferred stock and 34,287 shares of Series F stock outstanding 
prior to the Offering were converted into 178,568 and 85,717 shares, 
respectively, of common stock upon the closing of the Offering. 

PREFERRED STOCK DIVIDEND

     The Series D preferred stock, Series E preferred stock and Series F-1 
preferred stock converted into common stock at 70% of the Offering price. 
These reductions in the conversion prices to 70% of the Offering price were 
valued at $7,296,844 and recorded as a non-cash preferred stock dividend to 
arrive at the net loss available to holders of common stock in the 
calculation of net loss per share. 


                                       14

<PAGE>

EMPLOYEE STOCK PURCHASE PLAN

     In March 1996, the Company adopted the Employee Stock Purchase Plan 
whereby 270,833 shares of common stock have been reserved.  All employees who 
have met the service eligibility requirements are eligible to participate and 
may direct the Company to make payroll deductions of one to 10 percent of 
their compensation during a purchase period for the purchase of shares under 
the plan. Participants may purchase up to 5,000 shares of common stock for a 
given calendar year provided the fair market value of the stock is not more 
than $25,000 (determined at the beginning of each purchase period).  The plan 
provides a participating employee the right, subject to certain limitations, 
to purchase the Company's common stock at a price equal to the lower of 85% 
of the fair market value of the Company's common stock on the first day, or 
the last day, of the applicable purchase period.  The first purchase period 
commenced on July 1, 1996 and ended on December 31, 1996, of which 3,642 
shares of common stock were issued to employees for $13,548. In May 1997, the 
Employee Stock Purchase Plan was amended by stockholders to have two six 
month purchase periods beginning on January 1 and July 1 of each year.  In 
1998, 20,004 shares of common stock were purchased and issued to employees 
and in 1997, 8,279 shares of common stock were purchased of which 3,270 and 
5,009 were issued to employees in 1998 and 1997, respectively.

5.   CRITICAL CARE PRODUCTS ASSET PURCHASE

     In September 1998, the Company entered into an asset purchase agreement 
with NMI to acquire NMI's developed line of critical care enteral nutrition 
products and formulas. The asset purchase agreement closed in December 1998. 
GalaGen purchased substantially all of NMI's critical care enteral nutrition 
products and formulas, all related inventory valued at $65,516, certain other 
fixed assets valued at $31,000 and the existing customer base of over 500 
hospitals and home healthcare facilities valued at $450,000.  Total 
consideration for the transaction was $696,516, exclusive of closing costs of 
$69,847, comprised of $71,516 cash and 318,800 shares of the Company's common 
stock which was valued at $625,000.  Goodwill of $219,847 was recorded and 
will be amortized over a two-year period beginning in January 1999.  The 
Company will pay to NMI a royalty of nine percent of net U.S.  sales, as 
defined, of the critical care products in excess of (i) $5,000,000 during the 
year ending December 31, 2000, (ii) $6,000,000 during the year ending 
December 31, 2001, and (iii) $7,500,000 during the year ending December 31, 
2002.  Additionally, the Company will pay to NMI a royalty on international 
sales, as defined, of the critical care products of (i) five percent of 
net international sales in excess of $200,000 during the year ending on the 
first anniversary of the closing date, and (ii) two and one half percent 
of net international sales in excess of $200,000 during the year ending on 
the second anniversary of the closing date.

6.   AMERICAN HOME PRODUCTS CORPORATION AGREEMENT

     In October 1998, the Company entered into a collaboration and license 
agreement and a manufacturing and supply agreement with Wyeth-Ayerst 
Laboratories, a division of American Home Products Corporation ("AHP").  The 
two companies will develop and commercialize a proprietary ingredient with 
unique antibacterial properties for use in pediatric formula and other 
nutritional products.  The companies will collaborate during the research and 
development phase of the product, which will be funded by Wyeth-Ayerst, 
through payments to the Company. Additionally, Wyeth-Ayerst will have 
financial and oversight responsibilities for all clinical trials and 
regulatory compliance related to the use of the ingredient in pediatric 
formula products.  Wyeth-Ayerst will have worldwide rights to the use of the 
ingredient in its pediatric formula and other nutritional products. The 
Company will retain its right to manufacture the ingredient and has the right 
to request a sublicense from Wyeth-Ayerst to develop and commercialize 
non-pediatric formula nutritional products. The Company received a $250,000 
licensing fee and a $300,000 research and development advance from AHP.  The 
Company has recorded the $250,000 as licensing revenue and the $300,000 as a 
contract payable which will be amortized to research and development revenue 
when the Company incurs the associated expenses.  In 1998, $9,911 of the 
advance was amortized and recorded as research and development revenue. 
Seven-year warrants were issued to AHP to purchase 200,000 shares of common 
stock at $2.45 per share.  The fair value of the warrant was $250,000, which 
the Company is amortizing over the 2-year term of the research and 


                                       15

<PAGE>

development program. In 1998, $31,250 was amortized.

7.   OPERATING LEASE

     In June 1997, the Company established a note payable for approximately 
$1,319,000 for fixed assets with Transamerica Business Credit Corporation 
("Transamerica") of which $1,162,248 was outstanding at December 31, 1997.  
In June 1998, the Company converted the note payable into an operating lease. 
 At the time of the conversion the net book value of the associated assets 
approximated the note payable balance. Terms of the operating lease include 
monthly payments through May 2001 of approximately $36,000 with a final 
payment of $165,000 in June 2001. The operating lease is secured by the 
Company's property and equipment. Transamerica received a warrant for 40,000 
shares of common stock exercisable at $2.50 per share.  The warrant was 
valued at approximately $79,000 and was amortized to interest expense over 
the term of the note payable.
 
8.   CONVERTIBLE DEBENTURES

     In November 1997, the Company raised $1,500,000 through the private 
placement sale of 6% convertible debentures (the "Debentures") to three 
institutional investors pursuant to Regulation D under the Securities Act of 
1933.  The principal and interest of the Debentures can be converted into 
shares of the Company's common stock at 82.5% of the lowest closing bid price 
of the Company's common stock three days prior to conversion.  An aggregate 
maximum of 1,400,000 discounted shares of common stock  (the "Discounted 
Shares") can be issued upon the conversion of the Debentures, with each 
investor owning at any given time a maximum of 4.99% of the then issued and 
outstanding shares of common stock. If there remains any unconverted 
principal and accrued interest due to all the Discounted Shares being issued, 
the Company has the obligation to repay the investors, in the aggregate, a 
maximum principal of $500,000.  The Debentures automatically convert into the 
Discounted Shares eighteen months from the closing date.  Five-year warrants 
were issued to the investors to purchase, in the aggregate, 200,000 shares of 
common stock at 110% of the market value of the common stock on the closing 
date.  The value of the warrants plus the value of the discount of the 
Discounted Shares was $500,182, which the Company is amortizing over the term 
of the Debentures to interest expense. In 1998 and 1997, $421,515 and $72,000 
was amortized and recorded as interest expense, respectively.  A deferred 
expense was recorded for $144,467, which represents costs associated with 
closing the Debentures. These deferred expenses are being amortized until the 
Debentures are converted into Discounted Shares.  In 1998 and 1997, $112,893 
and $9,378 was amortized and recorded as an expense, respectively.  In 1998, 
$1,300,000 of  Debenture principal plus accrued interest was converted into 
1,260,073 shares of common stock.  In 1998, 73,000 shares of common stock 
were issued pursuant to warrant exercises.  The net carrying value of the 
Debentures approximates fair market value.  In connection with this private 
placement, the Company reserved 1,400,000 shares of common stock for issuance 
for the Discounted Shares and 200,000 shares of common stock for issuance for 
the warrants.

9.   OPTIONS AND WARRANTS

STOCK OPTION PLAN

     The Company has established a 1992 Stock Plan (the "1992 Plan") and a 
1997 Incentive Plan (the "1997 Plan"), under which both incentive and 
non-qualified options may be granted, which have reserved 880,210 and 
1,250,000 shares of common stock, respectively, for issuance.  The Company 
uses these plans as an incentive for employees, directors and technical 
advisors.  Stock awards in the aggregate of 100,000 shares of common stock 
may also be granted under the 1997 Plan. Options are granted at fair market 
value as determined on the date of grant and normally vest over three to five 
years. 


                                       16

<PAGE>

     The following plan and non-plan options are outstanding at December 31, 
1998:

<TABLE>
<CAPTION>
                                                                                  NON          WEIGHTED
                                               1992 PLAN       1997 PLAN         PLAN          AVERAGE
                                                OPTIONS         OPTIONS         OPTIONS        OPTION
                                              OUTSTANDING     OUTSTANDING     OUTSTANDING        PRICE     
                                             ------------------------------------------------------------
         <S>                                 <C>              <C>             <C>              <C> 
         Balance at December 31, 1995.......     351,133                         154,371         $5.67
          Granted...........................     477,476                          57,003          4.68
          Exercised.........................     (39,902)                              -          1.66
          Canceled..........................    (118,479)                        (25,730)         7.36
                                             ---------------                  --------------
         Balance at December 31, 1996.......     670,228                         185,644          4.74
          Granted...........................           -         379,300               -          3.96
          Exercised.........................     (51,162)              -         (13,541)         1.23
          Canceled..........................     (69,335)        (60,000)         (4,334)         4.51
                                             ---------------  --------------  --------------
         Balance at December 31, 1997.......     549,731         319,300         167,769          4.96
          Granted...........................     475,088         798,962         166,687          2.70
          Exercised.........................     (27,248)        (10,000)         (1,082)         2.37
          Canceled..........................    (682,533)       (355,540)       (208,524)         4.54
                                             ---------------  --------------  --------------
         Balance at December 31, 1998.......     315,038         752,722         124,850         $2.79
                                             ---------------  --------------  --------------
                                             ---------------  --------------  --------------
</TABLE>

     The following table summarizes information about the stock options 
outstanding at December 31, 1998:

<TABLE>
<CAPTION>
                                            OPTIONS OUTSTANDING                           OPTIONS EXERCISABLE
                             --------------------------------------------------     --------------------------------
                                              WEIGHTED-AVERAGE       WEIGHTED                     WEIGHTED AVERAGE
      RANGE OF EXERCISE        NUMBER            REMAINING           AVERAGE          NUMBER          EXERCISE
            PRICE            OUTSTANDING      CONTRACTUAL LIFE    EXERCISE PRICE    EXERCISABLE          PRICE          
      ------------------- ------------------ ------------------- ----------------- -------------- ------------------
      <S>                 <C>                <C>                 <C>               <C>            <C>
       $         1.50            6,000            9 years         $       1.50           6,000     $        1.50
                 2.19           25,000           10 years                 2.19               -                 -
                 2.38           66,000           10 years                 2.38          10,000              2.38
                 2.56          677,347            7 years                 2.56         393,145              2.56
                 3.13          384,722           10 years                 3.13               -                 -
                 3.25           20,000            8 years                 3.25          15,000              3.25
                 7.39           13,541            5 years                 7.39          13,541              7.39
                          ------------------                                       --------------
         $1.50 - 7.39        1,192,610                                   $2.79         437,686             $2.72
</TABLE>

     Options expire in five years and three months to ten years from the 
original grant date. Fully vested and exercisable options were 437,686, 
355,349 and 189,986 as of December 31, 1998, 1997 and 1996, respectively. The 
weighted average exercise prices for the fully vested and exercisable options 
as of December 31, 1998, 1997 and 1996 were $2.72,  $4.86 and $3.80, 
respectively.  In May 1997, the Company granted options for 20,000 shares of 
common stock to two consultants for services provided, of which 15,000 are 
fully vested.  In August 1997, a consultant was granted a stock award, based 
upon the value of the common stock at the date of grant, from the 1997 Plan 
of 1,493 shares of common stock in exchange for services provided.  In 
September and October 1998, a consultant was granted ten-year options from 
the 1997 Plan for 35,000 shares of common stock at fair market value of the 
date of grant for services to be provided, of which 10,000 are fully vested.

WARRANTS

     In connection with the June 1994 to October 1995 Convertible Promissory 
Notes (the "Notes") issuance of $8,275,000, each Note holder received a 
warrant, exercisable at $11.07 per share, to purchase that number of shares 
of common stock equal to 20% of the principal amount of such holder's Note 
divided 


                                       17

<PAGE>

by $11.07. The Company granted warrants to purchase 149,384 shares of the 
Company's common stock. These warrants expire five years from the date of 
grant, which expiration dates range from June 1999 to October 2000.

     In March 1995, Chiron was issued warrants to purchase 200,000 shares of 
the Company's Series F preferred stock for which the Company was paid 
$150,000. The Company issued the warrants to purchase 200,000 shares of 
Series F preferred stock to Chiron as follows: (i) warrant to purchase 17,144 
shares of Series F-1 preferred stock, exercise price of $17.50 per share 
(pre-Offering) or $24.00 per share (post-Offering); (ii) warrant to purchase 
42,856 shares of Series F-2 preferred stock, exercise price of $18.70 per 
share (pre-Offering) or $27.00 per share (post-Offering); (iii) warrant to 
purchase 60,000 shares of Series F-3 preferred stock, exercise price of 
$25.00 per share (pre-Offering) or $33.00 per share (post-Offering); and (iv) 
warrant to purchase 80,000 shares of Series F-3 preferred stock, exercise 
price of $25.00 per share (pre-Offering) or $36.00 per share (post-Offering). 
If, after the Company's Offering, the market value (as defined in the 
purchase agreement for the warrants) of a share of common stock is less than 
the stated post-Offering exercise price of any such warrant, the exercise 
price is reduced to such per share market value and the number of shares of 
common stock covered by the warrant are increased proportionately. Based upon 
the warrant agreements, the ceiling price for the warrants described in 
clauses (ii), (iii) and (iv) above were set at the closing of the Offering at 
$10.11, $9.24 and $10.08, respectively, per share of common stock.  Chiron 
exercised the warrant described in clause (i) above in March 1996 which 
converted into 42,860 shares of common stock at the closing of the Company's 
Offering.  Assuming the remaining three warrants were exercised in full on 
December 31, 1998, 3,418,813 shares of the Company's common stock would have 
been issued upon such exercise.  The exercise price is based upon the twenty 
day average of the average of the high and low closing market prices, as 
reported by Nasdaq National Market, prior to December 31, 1998, which is 
calculated at $1.76 per share.   The warrants expire on the earlier of six 
years from the date of issuance or 120 days after the warrant holder receives 
notice from the Company of the occurrence of certain defined milestone 
events. 

     In January 1996, the Company granted warrants to purchase 162,011 shares 
of common stock at $7.00 per share to six parties, one of which is a company 
which has a representative on the Company's Board which received a warrant to 
purchase 30,002 shares of common stock, in return for their guarantee on the 
Company's $2.7 million line of credit.  The Company also granted warrants to 
purchase 7,500 and 22,501 shares of the Company's common stock at $7.00 per 
share to certain investment funds associated with a representative on the 
Company's Board in return for their issuance of two convertible promissory 
notes totaling $500,000. These warrants expire February 2001. The fair value 
of the warrants was $768,064 which was recorded as interest expense in 1996.

     In March 1997, the Company issued warrants to purchase 10,000 shares of 
common stock, granted at $2.15, which was the fair market value on the date 
of grant, for certain services to be rendered.  The warrant expires in March 
2002. The fair value of the warrant, approximately $5,000, was amortized and 
expensed in 1997.

     In December 1997, the Company issued five-year warrants to financial 
consultants to purchase 25,000 and 40,000 shares of common stock at $2.50 and 
$3.00, respectively, which was greater than the market value of the common 
stock at the date of grant.  These warrants have a fair value of $50,450 
which is being amortized over the term of the consulting relationship.

     In April, June and September 1998, the Company issued five-year warrants 
to purchase 75,000, 25,000, 25,000 and 12,500 shares of common stock at 
$1.38, $2.63, $3.00 and $1.81 per share, respectively, to an officer and 
director of the Company for services performed while under a consulting 
agreement. The fair value of the warrants is $68,750, which the Company has 
amortized over the term of the consulting agreement.


                                       18

<PAGE>

     In August 1998, five-year warrants were issued to individuals of an 
investor relations firm to purchase 50,000 shares of common stock at $3.125 
per share.  The fair value of the warrants is $100,000, which the Company is 
amortizing over the term of the investor relations agreement.

A summary of the warrants follow:

<TABLE>
<CAPTION>
                                                WARRANTS
    GRANTED TO:                                OUTSTANDING          EXPIRATION DATE            GRANT PRICE
    ---------------------------------------- ---------------- ----------------------------- -------------------
    <S>                                      <C>              <C>                           <C>     
     Convertible Promissory Note Holders           149,384       June 1999 - October 2000              $11.07
     Chiron Corporation                          3,418,813                     March 2002               $1.76
     Line of Credit Guarantors                     192,012                  February 2001               $7.00
     Consultants                                    10,000                     March 2002               $2.13
     TransAmerica                                   40,000                      June 2002               $2.50
     Debenture Holders                             127,000                  November 2002               $2.34
     Financial Consultants                          65,000                  December 2002       $2.50 - $3.00
     Officer and Director                          137,500           April-September 2003       $1.38 - $3.00
     Investor Relations                             50,000                   August  2003               $3.13
     American Home Products Corporation            200,000                   October 2005               $2.45
                                             ----------------
                                                 4,389,709
                                             ----------------
                                             ----------------
</TABLE>

STOCK OPTION AND WARRANT AGREEMENT REVISIONS

     In August  1996, the Company canceled all common stock option agreements 
totaling 57,715 shares of common stock under the 1992 Plan and 18,958 shares 
of common stock outside of the 1992 Plan, with the exception of officer and 
director options, that were issued with a grant price greater than the fair 
market value at the date of re-grant and issued new stock option agreements 
with the same terms and conditions except that the grant prices were $5.375 
per share.

     In May 1998, the Company canceled all directors and employees common 
stock option agreements, totaling 941,075 shares of common stock under the 
1992 Plan, the 1997 Plan and nonplan options, that were issued with a grant 
price greater than the fair market value at the date of re-grant.  New stock 
option agreements were issued with an exercise price of $2.56 per share and a 
ten year term.

STOCK-BASED COMPENSATION

     The Company has elected to follow APB 25 in accounting for its employee 
stock options.  Under APB 25, if the exercise price of the Company's employee 
stock options equals the market price of the underlying stock on the date of 
grant, no compensation expense is recognized.

     Pro forma information regarding net loss and loss per share is required 
by Statement 123, and has been determined as if the Company had accounted for 
its employee stock options under the fair value method of Statement 123.  The 
fair value for these options was estimated at the date of grant using the 
Black-Scholes option pricing model with the following weighted-average 
assumptions for 1998, 1997 and 1996: risk-free interest rates approximating 
5.0%, 6.2% and 6.2%, respectively; volatility factor of the expected market 
price of the Company's common stock ranging from .3 to 1.08 for all three 
years and a weighted-average expected life of the option of  two to seven 
years for all three years. The weighted average fair value of the options 
granted in 1998, 1997 and 1996 is $2.36, $2.16 and $2.54 per share, 
respectively, as computed as described above.

     The Black-Scholes option valuation model was developed for use in 
estimating the fair value of traded options which have no vesting 
restrictions and are fully transferable.  In addition, option valuation 
models require the input of highly subjective assumptions.  Because the 
Company's employee stock options have characteristics significantly different 
from those of traded options, and because changes in the subjective input 
assumptions can materially affect the fair value estimate, in management's 
opinion, 


                                       19

<PAGE>

the existing models may not necessarily provide a reliable single measure of 
the fair value of its employee stock options.

     For purposes of pro forma disclosures, the estimated fair value of the 
options is amortized to expense over the options' vesting period.  The 
Company's pro forma information is as follows: 

<TABLE>
<CAPTION>
                                                     1998                  1997                   1996
                                              -------------------    ------------------     ------------------
                                              <C>                    <C>                    <C>
Pro forma amortized expense..............       $       566,859        $      435,589         $      165,762
Pro forma net loss applicable
 to common stockholder...................       $    (5,087,088)       $   (6,070,723)        $  (14,949,353)
Pro forma net loss per common share,
 Basic and Diluted.......................       $         (0.63)       $        (0.84)        $        (2.26)
</TABLE>


     The pro forma effect on net loss for 1998, 1997 and 1996 is not 
representative of the pro forma effect on net loss in future years because it 
does not take into consideration pro forma compensation expense related to 
grants made prior to 1995.

DEFERRED COMPENSATION

     In December 1995, the Company canceled certain stock option agreements 
within the Plan and certain stock options that were outside of the  Plan that 
had grant prices ranging from $7.38 per share to $11.07 per share and issued 
new stock option agreements with the same terms and conditions except that 
the grant prices were $3.69 per share. The Company recorded $1,657,000 as 
deferred compensation for the difference between the new grant price per 
share of common stock and the fair market value of the common stock per share 
on the date of grant, as determined by the board of directors, multiplied by 
the total number of options affected.  In December 1998, 1997 and 1996, the 
Company adjusted the deferred compensation balance by $24,000, $35,800 and 
$261,200 to account for terminated employee options that were not vested. The 
deferred compensation is amortized ratably over the vesting period of the 
options.  In 1998, 1997 and 1996, $185,404, $273,864 and $340,066 was 
amortized, respectively.  The remaining deferred compensation of $60,400 will 
be amortized in 1999. 

10.  COMMITMENTS

     The Company has commitments under the following agreements: 

LICENSE AGREEMENTS

     In August 1998, the Company received a $250,000 fee from a company for 
the re-licensing of previously licensed technology.  Pursuant to this 
agreement, the Company is entitled to receive royalties on the net sales of 
certain GalaGen ingredients and certain GalaGen nutritional products that 
incorporate their technology.

     In March 1995, the Company entered into a License and Collaboration 
Agreement with Chiron Corporation involving the licensing of Chiron adjuvant 
technology for certain products. Pursuant to this agreement, Chiron has 
granted an exclusive worldwide license for certain of Chiron's proprietary 
adjuvant technology to the Company for which the Company issued 17,143 shares 
of its Series F-1 preferred stock to Chiron.  See Note 9.

     The royalties on the above agreements range from one-half to five 
percent, depending on the volume, of certain net sales. 


                                       20

<PAGE>

OTHER AGREEMENTS

     A three-year service agreement that began in 1996 for specified raw 
material preparation assistance requires payments of approximately  $14,000 
in 1999.

     A twelve month contract that began in August 1998 for various consulting 
and public relations services requires payments of approximately $56,000 in 
1999.

     A twelve month contract that began in September 1998 for international 
sales consulting services requires payments of approximately $54,000 in 1999. 
 The contract also calls for sales commissions equal to the lower of  20% of 
net international sales of the acquired NMI product line, or 50% of  gross 
margin on net international  sales, as defined in the agreement.  

LEASE COMMITMENTS

     The Company leases certain office equipment under an operating lease.

     During June 1996, the Company entered into a five-year lease agreement 
with Land O'Lakes for specified space within the Land O'Lakes facility in 
connection with the Company's manufacturing facility.  The lease calls for 
annual payments of approximately $87,000 and can be extended for additional 
one-year periods at the option of the Company.

     In December 1996, the Company entered into an operating lease with 
Cargill Leasing Corporation for $835,393 of manufacturing equipment for the 
Company's plant facility.  Lease payments of approximately $11,000 per month 
will continue for a period of seven years with the Company's option to extend 
for an additional 12 months.  The rental percentage was computed on a 
weighted average of the 30-day LIBOR rate and the rate on five-year U.S. 
Treasury Notes. The lease is guaranteed by Land O'Lakes.

     In June 1998 the Company entered into an operating lease with 
Transamerica which calls for monthly payments of approximately $36,000 until 
May 2001, with a final payment of $165,000 due June 2001.  See Note 7.    

     The total lease expense was $441,972, $199,808 and $3,133, respectively, 
for the years ended December 31, 1998, 1997, and 1996. The future minimum 
annual lease payments are as follows:

<TABLE>
    <S>                                                <C>
    1999.............................................   $    628,000
    2000.............................................        628,000
    2001.............................................        510,000
    2002.............................................        131,000
    2003.............................................        131,000
                                                       -----------------
                                                          $2,028,000
                                                       -----------------
                                                       -----------------
</TABLE>


                                       21

<PAGE>

11.  INCOME TAXES

     Prior to the effective date of the merger with Procor, GalaGen's losses 
were utilized by Land O'Lakes in its consolidated tax return.  Subsequent to 
the effective date of the merger and through December 31, 1998, GalaGen has 
operating loss carryforwards to offset future taxable income of approximately 
$36,300,000 which begin to expire in 2007.  No benefit has been recorded for 
such loss carryforwards, and utilization in future years may be limited, if 
significant ownership changes have occurred. 

     Components of deferred tax assets are as follows:

<TABLE>
<CAPTION>
                                                                        DECEMBER 31
                                                  -------------------------------------------------------
                                                       1998                 1997                 1996
                                                       ----                 ----                 ----
<S>                                               <C>                 <C>                  <C>
Loss carryforwards.........................       $  13,445,000       $   12,000,000       $    9,968,000
Research and development tax credit
   carryforwards...........................             894,000              791,000              566,000
Deferred compensation......................             472,000              403,000              302,000
                                                 --------------       --------------       --------------
                                                 $   14,811,000       $   13,194,000       $   10,836,000
Less valuation allowance...................         (14,811,000)         (13,194,000)         (10,836,000)
                                                 --------------       --------------       --------------
Net deferred tax assets....................      $            -       $            -       $            -
                                                 --------------       --------------       --------------
                                                 --------------       --------------       --------------
</TABLE>


                                       22

<PAGE>

                        REPORT OF INDEPENDENT AUDITORS


Board of Directors
GalaGen Inc.


     We have audited the accompanying balance sheets of GalaGen Inc. as of 
December 31, 1998, and 1997, and the related statements of operations, 
changes in stockholders' equity and cash flows for each of the three years in 
the period ended December 31, 1998.  These financial statements are the 
responsibility of GalaGen's management. Our responsibility is to express an 
opinion on these financial statements based on our audits. 

     We conducted our audits in accordance with generally accepted auditing 
standards. Those standards require that we plan and perform the audit to 
obtain reasonable assurance about whether the financial statements are free 
of material misstatement. An audit includes examining, on a test basis, 
evidence supporting the amounts and disclosures in the financial statements. 
An audit also includes assessing the accounting principles used and 
significant estimates made by management, as well as evaluating the overall 
financial statement presentation. We believe that our audits provide a 
reasonable basis for our opinion. 

     In our opinion, the financial statements referred to above present 
fairly, in all material respects, the financial position of GalaGen Inc. at 
December 31, 1998 and 1997 and the results of its operations and cash flows 
for each of the three years in the period ended December 31, 1998 in 
conformity with generally accepted accounting principles. 


                                       Ernst & Young LLP


Minneapolis, Minnesota
January 22, 1999


                                       23

<PAGE>

                             SELECTED FINANCIAL DATA

       The selected financial data set forth below as of December 31, 1998 
and 1997 and for each of the three years in the period ended December 31, 
1998 are derived from the financial statements of the Company which have been 
audited by Ernst & Young LLP, independent auditors, and are included herein. 
The selected financial data as of December 31, 1996, 1995 and 1994 and for 
each of the two years in the period ended December 31, 1995 are derived from 
audited financial statements which are not included herein. The data set 
forth below should be read in conjunction with the financial statements and 
notes thereto included in the appendix and with "Management's Discussion and 
Analysis of Financial Condition and Results of Operations", included above.

<TABLE>
<CAPTION>
                                                                            YEAR ENDED DECEMBER 31
                                                     ------------------------------------------------------------------
                                                         1998          1997          1996          1995          1994
                                                     ----------    ----------    ----------    ----------    ----------
                                                             (IN THOUSANDS, EXCEPT SHARE NUMBERS AND PER SHARE DATA)
<S>                                                  <C>           <C>           <C>           <C>           <C>   
STATEMENTS OF OPERATIONS:
   Revenues.......................................   $      876    $        -    $        -    $      150    $        -
   Operating costs and expenses:
     Cost of goods sold...........................          244             -             -             -             -
     Selling, general and administrative..........        2,235         1,541         1,480         1,417         1,645
     Product development..........................        1,914         3,760         5,258         3,731         3,442
     Depreciation and amortization................          768           601           409           605            75
   Operating loss.................................       (4,285)       (5,902)       (7,147)       (5,603)       (5,162)
   Interest income................................          338           448           605            31            28
   Interest expense...............................         (573)         (181)         (945)         (507)         (260)
   Net loss before extraordinary gain.............       (4,520)       (5,635)       (7,487)       (6,079)       (5,394)
   Extraordinary gain on extinguishment of
     debt ........................................            -             -             -           605             -
   Net loss for the period........................       (4,520)       (5,635)       (7,487)       (5,474)       (5,394)
   Preferred stock dividend (1)...................            -             -        (7,297)            -             -
   Net loss applicable to common stockholders.....   $   (4,520)   $   (5,635)   $  (14,784)   $   (5,474)   $   (5,394)
   Net loss per share applicable to common
     stockholders
     Basic and Diluted............................   $     (.56)   $     (.78)   $    (2.24)   $    (2.87)   $    (2.89)

   Weighted average number of common shares
   outstanding
     Basic and Diluted............................    8,067,564     7,184,722     6,604,902     1,904,059     1,866,561

<CAPTION>
                                                                                     DECEMBER 31
                                                     ------------------------------------------------------------------
                                                         1998          1997          1996          1995          1994
                                                     ----------    ----------    ----------    ----------    ----------
                                                                                   (IN THOUSANDS)
<S>                                                  <C>           <C>           <C>           <C>           <C>   
  BALANCE SHEET DATA:
      Cash and cash equivalents..................    $   4,082     $     156     $   3,870      $    509      $    430
      Available-for-sale securities (2)............          -         7,512         7,498             -             -
      Accounts receivable, net of allowance......          315             -             -             -             -
      Inventory..................................          303             -             -             -             -
      Working capital (deficiency)...............        3,725         7,028         9,776        (1,033)         (846)
      Total assets...............................        6,293         9,530        12,959           818           686
      Note payable (3)...........................            -         1,162             -             -             -
      Accrued expenses payable to Land O'Lakes               -             -             -           225            26
      Convertible notes (4)......................          193         1,072             -         8,199         5,707
      Total liabilities..........................        1,217         2,877         1,724        10,521         7,278
      Stockholders' equity (deficiency)..........        5,076         6,653        11,235        (9,703)       (6,592)
</TABLE>

- ---------------

Net loss per share applicable to common stockholders has been restated to 
comply with the Financial Accounting Standards Board issued Statement No. 
128, EARNINGS PER SHARE. See Note 2 of the Notes to the Financial Statements 
for further discussion.


                                       24

<PAGE>

 (1)  See Note 4 of Notes to Financial Statements for an explanation of the
      preferred stock dividend.

(2)   See Note 2 of Notes to Financial Statements for an explanation of the
      available-for-sale securities.

(3)   See Note 7 of Notes to Financial Statements for an explanation of the
      note.

(4)   See Note 8 of Notes to Financial Statements for an explanation of
      convertible notes.



                                       25

<PAGE>

                    MARKET FOR REGISTRANT'S COMMON EQUITY
                       AND RELATED STOCKHOLDER MATTERS

     The Company's common stock, par value $.01 per share, has been publicly 
traded since the closing of the Company's initial public offering on April 1, 
1996. The common stock trades on the Nasdaq National Market tier of The 
Nasdaq Stock Market under the symbol GGEN. At March 18, 1999, the number of 
holders of the common stock was approximately 1,880, consisting of 220 record 
holders and 1,660 stockholders whose stock is being held by a bank, broker or 
other nominee. On March 18, 1999, the closing sale price of a share of the 
common stock was $1.91.

     The high and low sale prices per share of the common stock for the four 
quarters during the years ended December 31, 1998 and 1997 were as follows:

<TABLE>
<CAPTION>
                                       1998                           1997
                            --------------------------    ---------------------------
                                HIGH          LOW             HIGH           LOW
                            ------------- ------------    -------------- ------------
   <S>                      <C>           <C>             <C>            <C> 
   First Quarter             $   2.250    $   0.844        $   4.625     $   1.750
   Second Quarter            $   3.313    $   1.563        $   3.250     $   2.000
   Third Quarter             $   4.000    $   1.625        $   2.750     $   2.000
   Fourth Quarter            $   3.000    $   1.375        $   2.375     $   1.500
</TABLE>

     The Company has never paid cash dividends on the common stock.  The 
Board of Directors does not anticipate paying cash dividends in the 
foreseeable future.

RECENT SALES OF UNREGISTERED SECURITIES

     During the year ended December 31, 1998, the Company has sold the 
following equity securities pursuant to exemptions from registration under 
the Securities Act of 1933, as amended (the "Securities Act").  All such 
sales were made in reliance upon the exemptions from registration provided 
under Sections 3(b) and 4(2) of the Securities Act.

     1.   In April, June and September 1998, the Company issued five-year 
warrants to purchase 75,000, 25,000, 25,000 and 12,500 shares of common stock 
at $1.38, $2.63, $3.00 and $1.81 per share, respectively, to Henry J. 
Cardello, President and a director of the Company, for services performed 
while under a consulting agreement with Marketing Venture of America, Inc.  
The warrants were valued at fair market value on the date of grant. The fair 
value of the warrants is $68,750, which the Company has amortized over the 
term of the consulting agreement

     2.   In August 1998, five-year warrants were issued to William Young and 
Rebecca Young, to purchase 50,000 shares of common stock at $3.125 per share. 
The warrants were valued at fair market value on the date of grant.  The fair 
value of the warrants is $100,000, which the Company is amortizing over the 
term of the investor relations agreement.

     3.   In October 1998, seven-year warrants were issued to American Home 
Products Corporation to purchase 200,000 shares of common stock at $2.45 per 
share, which was greater than the fair market value of the common stock on 
the closing date.  The fair value of the warrant is $250,000, which the 
Company is amortizing over the term of the research and development program.

     4.   In December 1998, 318,800 shares of common stock were issued to NMI 
as part of the total consideration paid for the asset acquisition from NMI.  
The shares were issued at $1.96 per share, which was greater than the fair 
market of the common stock on the closing date. 


                                       26


<PAGE>

                                                                  EXHIBIT 23.1



                      Consent of Ernst & Young LLP


We consent to the incorporation by reference in this Annual Report on Form 
10-K of GalaGen Inc. of our report dated January 22, 1999, included in the 
1998 Annual Report to Shareholders of GalaGen Inc.

Our audits also included the financial statement schedule of GalaGen Inc. 
listed in Item 14(a).  This schedule is the responsibility of the Company's 
management. Our responsibility is to express an opinion based on our audits.  
In our opinion, the financial statement schedule referred to above, when 
considered in relation to the basic financial statements taken as a whole, 
presents fairly in all material respects the information set forth therein.

We consent to the incorporation by reference in the Registration Statements 
on Form S-8 (Nos. 333-05415, 333-05417, 333-27031 and 333-33357) pertaining 
to the GalaGen Inc. 1992 Stock Plan, Employee Stock Purchase Plan, 
Non-Statutory Stock Option Agreements and 1997 Incentive Plan and in the 
Registration Statements on Form S-3 (Nos. 333-71883, 333-64489 and 333-41551) 
of GalaGen Inc. and in the related Prospectus of our report dated January 22, 
1999, with respect to the financial statements of GalaGen Inc. incorporated 
by reference in this Annual Report on Form 10-K for the year ended December 
31, 1998 and the related financial statement schedule included herein, filed 
with the Securities and Exchange Commission.

                                       Ernst & Young LLP


Minneapolis, Minnesota
March 25, 1999




                                       27


<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM YEAR ENDED
DECEMBER 31, 1998 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               DEC-31-1998
<CASH>                                       4,081,733
<SECURITIES>                                         0
<RECEIVABLES>                                  328,599
<ALLOWANCES>                                    14,020
<INVENTORY>                                          0
<CURRENT-ASSETS>                             4,897,456
<PP&E>                                         671,796
<DEPRECIATION>                                 270,418
<TOTAL-ASSETS>                               6,293,340
<CURRENT-LIABILITIES>                        1,172,247
<BONDS>                                              0
                                0
                                          0
<COMMON>                                        89,484
<OTHER-SE>                                   4,986,609
<TOTAL-LIABILITY-AND-EQUITY>                 5,076,093
<SALES>                                        616,168
<TOTAL-REVENUES>                               876,079
<CGS>                                          244,141
<TOTAL-COSTS>                                  244,141
<OTHER-EXPENSES>                             4,917,131
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             573,043
<INCOME-PRETAX>                            (4,520,229)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                        (4,520,229)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                               (4,520,229)
<EPS-PRIMARY>                                    (.56)
<EPS-DILUTED>                                    (.56)
        

</TABLE>


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