HUMAN GENOME SCIENCES INC
10-K, 1997-03-31
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                   ----------

                                    FORM 10-K

                  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                                   ----------

   For the fiscal year ended December 31, 1996 Commission File Number 0-22962

                           HUMAN GENOME SCIENCES, INC.
                           (Exact name of registrant)
                              

       Delaware                                       22-3178468
 (State of organization)                 (I.R.S. employer Identification number)

                 9410 Key West Avenue, Rockville, Md. 20850-3338
             (address of principal executive offices and zip code )

                                 (301) 309-8504
                         (Registrant's telephone Number)

        Securities registered pursuant to Section 12(b) of the Act: NONE

                Securities 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  the  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. [ ]

The number of shares of the registrant's  common stock  outstanding on March 17,
1997 was 21,870,460

As of March 17,  1997,  the  aggregate  market value of the common stock held by
non-affiliates  of the  registrant  based on the closing  price  reported on the
National  Association  of Securities  Dealers  Automated  Quotations  System was
approximately $ 560,000,000.*

                       DOCUMENTS INCORPORATED BY REFERENCE

Portions of Human Genome Sciences, Inc.'s Notice of Annual Stockholder's Meeting
and  Proxy  Statement,  to be  filed  within  120  days  after  the  end  of the
registrant's fiscal year, are incorporated into Part III of this Annual Report.

*    Excludes  6,628,616  shares of  common  stock deemed to be held by officers
     and directors, and stockholders whose ownership exceeds five percent of the
     shares  outstanding  at March 17,  1997.  Exclusion  of shares  held by any
     person should not be construed to indicate  that such person  possesses the
     power,  direct  or  indirect,  to  direct  or cause  the  direction  of the
     management or policies of the registrant, or that such person is controlled
     by or under common control with the registrant.



<PAGE>




                                     PART I
ITEM 1.  BUSINESS

         This Annual  Report on Form 10-K  contains,  in addition to  historical
information,  forward-looking statements that involve risks and uncertainty. The
Company's actual results could differ signficantly from the results discussed in
the forward-looking  statements.  Factors that could cause or contribute to such
differences include those discussed in "Management's  Discussion and Analysis of
Financial Condition and Results of Operations"  forward-looking  statements,  as
well as those discussed elsewhere in this Annual Report on Form 10-K.

GENERAL
            Human  Genome  Sciences,  Inc.  (the  "Company")  is  engaged in the
research and  development of novel,  proprietary  pharmaceutical  and diagnostic
products  based on the discovery  and  understanding  of the medical  utility of
genes. Using automated, high throughput gene sequencing technology,  the Company
has generated over  1,000,000  partial human gene  sequences,  which the Company
believes  correspond to most of the expressed  genes in the human body,  and now
possesses one of the largest proprietary databases of human and microbial genes.
Based on this genomic database,  the Company has created a broad base of product
opportunities. The Company's activities have progressed to focusing primarily on
research and  development  of therapeutic  protein  product  candidates.  In its
efforts to identify the most promising product candidates,  the Company uses its
advanced proprietary bioinformatics system to analyze partial gene sequences and
identify the genes corresponding to such partial gene sequences and the proteins
encoded by such genes.  As of February  15,  1997,  the Company has isolated and
characterized  several hundred full-length genes and expressed and purified more
than 100 potential therapeutic proteins. The Company is currently evaluating six
therapeutic protein product candidates in preclinical studies. In addition,  the
Company is  investigating  for development  with its  collaborators  proprietary
product  opportunities  in  diagnostics  and small molecule drugs based on human
genes,  as well as  vaccines,  antibiotics,  and  diagnostics  based on genes of
microorganisms.

     The Company has a two-pronged commercialization strategy:

     Product  Development  and  Commercialization.   The  Company  utilizes  its
     internal  capabilities  to  research  and develop  recombinant  therapeutic
     proteins, which are proteins that can be produced on a large scale and used
     as drugs to treat  diseases.  The  Company  generally  intends  to  develop
     potential  products to a late  preclinical or early clinical stage and then
     to collaborate with  pharmaceutical or biotechnology  companies for further
     development  and  commercialization.  However,  the  Company  may  consider
     developing certain potential products on its own.

     Corporate   Collaborations.   The  Company   leverages  its  resources  and
     capabilities by establishing  collaborations with pharmaceutical  companies
     for the  development  and  commercialization  of new products.  The Company
     believes  that these  arrangements  will  enable  the  Company to focus its
     internal resources on a select number of promising product candidates while
     still exploiting the broader product opportunities presented by its genomic
     database.

     The Company's  initial  collaboration  was formed with  SmithKline  Beecham
Corporation   ("SmithKline   Beecham")  in  May  1993  (as   amended,   the  "SB
Collaboration  Agreements").  To date,  the Company has received $125 million in
payments from SmithKline Beecham and is further entitled to product  development
milestone  payments  and  royalty  payments.  In  June  1995,  the  Company  and
SmithKline  Beecham entered into a collaboration  agreement with Takeda Chemical
Industries,  Ltd.  ("Takeda"),  whereby  Takeda was  granted  certain  rights to
develop  and  commercialize  products  based  on the  Company's  and  SmithKline
Beecham's  human gene  technology  ("Human  Gene  Technology")  and an option to
develop and commercialize  for Japan certain products  developed by the Company.
In  June  1996  the  Company  entered  into a  significant  amendment  (the  "SB
Amendment") to the SB Collaboration Agreements which, among other things, allows
the Company to designate six therapeutic  proteins at any one time for exclusive
development  and   commercialization   (subject  to  certain   restrictions  and
co-development  rights  of  its  collaborators)  and  permits  the  Company  and
SmithKline  Beecham to enter into  additional  collaboration  agreements  in the
field covered by the SB Collaboration Agreements.



<PAGE>



     In June 1996 and July 1996, the Company and SmithKline Beecham entered into
collaboration  agreements  (the "New  Collaboration  Partner  Agreements")  with
Schering     Corporation    and     Schering-Plough,     Ltd.     (collectively,
"Schering-Plough"),  Synthelabo  S.A.  ("Synthelabo")  and Merck KGaA  ("Merck")
(collectively,  the "New  Collaboration  Partners").  Under the terms of the New
Collaboration Partner Agreements, $87.5 million of license and research payments
is payable to the  Company  over five  years,  of which  $17.5  million has been
received to date. In addition,  the New Collaboration Partner Agreements provide
for milestone  and royalty  payments  with respect to products  developed  under
these agreements.  In exchange,  the New Collaboration Partners received certain
rights to research,  develop and commercialize therapeutic products based on the
Company's and SmithKline  Beecham's Human Gene Technology.  Schering-Plough  and
SmithKline  Beecham  have been  granted  the right to develop  jointly  with the
Company  certain of the  therapeutic  protein  product  candidates  to which the
Company has retained the exclusive development rights.

     The Company also has entered into other collaborative agreements in certain
areas where the Company has retained exclusive rights,  including:  the creation
of bacterial vaccines and  immunotherapeutics  and antimicrobial agents based on
genes of infectious  agents;  corn genomics;  and gene therapy.  Pursuant to the
terms of such collaboration agreements, an aggregate of $34.1 million of license
and research  payments is payable to the Company over five years, of which $18.5
million has been received to date.

     The Company also has formed a  collaboration  with The Institute of Genomic
Research ("TIGR").  Under the collaboration agreement, the Company has agreed to
provide TIGR with funding  totaling  $85 million over a ten-year  period  ending
September  2002,  of which $44  million  has been paid to date.  In return,  the
Company  is  entitled  to  exclusive  intellectual  property  rights  to  TIGR's
research.

     The  Company   vigorously  pursues  patents  to  protect  its  intellectual
property.  As of February  15,  1997,  the Company has five issued U.S.  patents
covering full-length genes and has filed U.S. patent applications  covering more
than 230  full-length  genes and the  proteins  they encode.  The Company  makes
patent filings outside the United States as it deems  appropriate.  In addition,
the Company has filed  patent  applications  with  respect to more than  190,000
expressed  sequence tags ("EST's")  that  represent over 1,000,000  partial gene
sequences,  although there is substantial uncertainty as to the patentability of
partial gene sequences.

GENOME SCIENCE


     Genome science refers to the  characterization of the entire set of genetic
information of any organism,  including humans. All cells contain DNA, a complex
material containing all of the genetic information  necessary to govern a cell's
biological processes. In humans,  approximately 3-5% of DNA consists of segments
called  genes.  The entire human genome is believed to contain at least  100,000
genes, of which only several  thousand were known to have been identified at the
time the  Company  commenced  its  operations.  Each gene  consists  of a linear
sequence of nucleotides,  the basic  structural  units of DNA.  Sequencing genes
involves  determining  the  order of  nucleotides  in the  gene,  which  permits
identification of the gene and the protein produced by the gene.

     Genes act as the fundamental blueprint for all the physiological attributes
of an  individual.  Each gene  contains  the  information  required  to  produce
("express")  a gene  product,  generally a protein.  Proteins are expressed by a
gene according to a set of genetic  instructions  encoded in the DNA and are the
principal  determinants  of an  organism's  characteristics.  A typical  cell of
higher  animals,  such as  humans,  contains  thousands  of  different  proteins
essential to cellular  structure,  growth and function.  The aberrant expression
within a cell by even a  single  gene  can  severely  alter  the  cell's  normal
function and result in a disease condition.

     When a gene is expressed in a cell,  the order of different  nucleotides in
the gene is copied into RNA in a duplication  process  called  transcription.  A
splicing  process within the cell then removes the introns,  or non-coding  gene
segments, from the transcript,  thereby creating a messenger RNA ("mRNA"), which
contains only the exons,  or coding regions,  of the transcribed  gene. The mRNA
then directs the  production of a protein in a process called  translation.  The
order of  nucleotides  in the  mRNA  determines  the  protein  that is made.  By
isolating mRNA from cells,  the Company's  scientists can analyze  primarily the
coding regions of a gene.  However,  mRNA is unstable and therefore is difficult
to  analyze  directly.  To  sequence  the  mRNA,  it is  preferable  to  copy or
transcribe  the mRNA back into DNA. This process  produces a DNA copy  ("cDNA"),
which contains only the exons,  or coding  regions,  of the expressed gene. This
process avoids examination of the majority of human DNA, as approximately 95-97%
of
<PAGE>

the human genome consists of long stretches of nucleotides which do not code for
protein. By focusing on the mRNA, the Company examines the portion of the genome
which it believes  to be the most  important,  because it is the  portion  which
makes protein.

     Genes  play  an  important  role  in  the   development  of  a  variety  of
therapeutics, diagnostics and other products and services. Proteins expressed by
genes are the targets of most drugs. As a result, the identification of proteins
can  play an  important  role in the  development  of drugs  and  drug  screens.
Proteins  themselves can also be used as drugs. Two examples of protein drugs on
the market are  erythropoietin,  which  stimulates  the  production of red blood
cells, and insulin,  which regulates sugar  metabolism.  The  identification  of
genes that code for  proteins  that may be missing or  defective  can enable the
development of therapeutics for genetic diseases. In addition, identification of
genes  that may  predispose  a person to a  particular  disease  may  enable the
development of diagnostic tests for the disease.

COMPANY TECHNOLOGY AND RESEARCH


The Human Gene Anatomy Project


     The gene  discovery  activity  of the Company has focused on its Human Gene
Anatomy  Project.  The goal of this project is to identify  virtually  all human
genes, to catalogue the relative  abundance of expressed genes by organ,  tissue
and cell of origin and to identify  changes in gene  expression  associated with
the normal processes of development,  differentiation and activation, as well as
abnormal changes in gene expression  associated with the development of disease.
The Company  believes its Human Gene Anatomy Project  approach is  substantially
different  from most others  engaged in genomic  research,  which seek either to
isolate a single copy of each gene,  determine  the sequence of large regions of
human chromosomes or determine the chromosome  location of genes responsible for
inherited  genetic  diseases.  While such  approaches  will provide  information
valuable for the creation of some new gene-based  pharmaceutical  products,  the
Company  believes  that its Human Gene Anatomy  Project  provides a much broader
opportunity to discover genes of potential medical use.

     The first  component of the Human Gene Anatomy Project is the isolation and
preparation of a set of cDNA libraries from most normal human tissues. A library
is comprised  of cDNA  derived  from  samples of mRNA  expressed in a particular
tissue.  The Company's  libraries reflect the relative  abundance of the various
mRNAs expressed in each tissue. As of February 15, 1997, the Company, SmithKline
Beecham and TIGR had prepared more than 600 such libraries, which include almost
all normal human  tissues.  The Company  isolates and purifies  individual  cDNA
fragments from each library for sequence  analysis to identify the structure and
possible  function of genes. The Company sequences a portion of each cDNA, which
the Company  believes is often  sufficient  to identify the  expressed  gene and
represent the best method for rapid gene discovery.

     The Company's gene  sequencing  efforts now focus  principally on comparing
genes expressed in normal and abnormal,  developmental tissues. The Company uses
such  information  to  analyze  changes  in  gene  expression   associated  with
development,  differentiation  and  disease  processes,  such as  tumors  of the
prostate,  breast, colon and ovary. Additional areas of planned research include
changes in gene expression  that occur during the processes of  atherosclerosis,
asthma, emphysema, restenosis,  osteoporosis,  psoriasis, arthritis and a number
of neurological diseases.


Development of Product Opportunities


     The Company has created an advanced  proprietary  bioinformatics  system to
facilitate the selection of genes with potential medical utility. Bioinformatics
refers  to the  use  of  computers  to  process,  analyze,  store  and  retrieve
biological  information.  The Company believes it has one of the largest sets of
human gene  sequences,  and its computer  system  enables it to access  publicly
available gene sequences.  The Company's high capacity  computer system has been
designed for ease of use by research  scientists,  who readily access the system
through desktop computers. The Company's data is also available to scientists at
SmithKline  Beecham,   Takeda,  and  the  New  Collaboration   Partners  through
bioinformatics  systems created by the Company and SmithKline Beecham.  See " --
Collaborative Arrangements."



<PAGE>





     The  Company  believes  that its  proprietary  bioinformatics  system is an
important  asset for the  creation  of  gene-based  product  opportunities.  The
Company's   bioinformatics   system  has  several   capacities  that  facilitate
identification  of  genes  with  potential   medical  utility,   including  gene
similarity  detection,  sequence  motif  identification,  sequence  assembly and
differential gene expression analysis.

     The Company's  primary focus has progressed  from  identification  of genes
having  potential  medical  utility  to  the  creation  of  proprietary  product
opportunities.  Specifically,  the Company is now engaged in the  identification
and   development   of  product   candidates,   including   the   isolation  and
characterization of full-length cDNAs, purification of proteins encoded by cDNAs
of  interest,  the  creation of cell lines that  express  specific  receptors of
interest,  the mapping of genes of  interest,  the  creation of  polyclonal  and
monoclonal  antibodies,  the testing of the effects of purified proteins in cell
and  tissue-based  in vitro  assays  and the study of the  effects  of  purified
proteins in small laboratory animals.

     Approximately  184 of the  Company's 244  scientific  staff at February 15,
1997 are devoted to these  activities.  As of February 15, 1997, the Company has
isolated and fully sequenced several hundred  full-length  cDNAs,  purified more
than 100  potential  therapeutic  proteins and mapped more than 250  full-length
cDNAs to their chromosomal locations.

     The Company's research and development efforts have been organized into the
following divisions:

Molecular  Biology Division.  The Company's  Molecular Biology Division seeks to
identify and evaluate  genes that may be useful for the creation of  therapeutic
protein drugs,  small molecule  drugs,  gene therapy,  antisense  treatments and
diagnostic  products.  The  Molecular  Biology  Division  contains  the  Protein
Therapeutics group and Exploratory Research group.

     The Protein  Therapeutics group identifies and evaluates genes which encode
proteins which may be useful as therapeutic protein drugs or for gene therapy or
antisense  applications.  The Protein  Therapeutics  group also identifies genes
that may be useful for diagnostic purposes.  When comparative analysis indicates
that a gene encodes a potential  therapeutic  protein,  this group  isolates the
corresponding  full-length cDNA, determines its pattern of tissue expression and
its entire coding sequence.

     The Company has  commenced a program to identify  from its database what it
believes  to  be  full-length  cDNAs  likely  to  encode  potential  therapeutic
proteins.  To date, the Company has identified what it believes to be over 4,000
secreted  proteins.  The Company is expressing and evaluating these proteins and
assessing  their activity using in vitro and in vivo models  covering  different
therapeutic areas.

     In  addition  to  efforts  relating  to  the  identification  of  potential
therapeutic  proteins,  the Protein  Therapeutics group  characterizes genes and
proteins  that  may  serve  as  targets  for  small  molecule  drug   discovery,
principally  to  support  the work of the  Company's  collaborators.  The  group
isolates  full-length  cDNAs,  performs  experiments to determine the tissue and
cell type in which the genes are expressed and determines the complete  sequence
of the cDNA  corresponding  to each  candidate  gene.  The group has  identified
several  hundred  genes  which  encode  proteins  that may be targets  for small
molecule drug screening.  Full-length cDNAs corresponding to many of these genes
have been isolated and fully sequenced,  and tissue distribution and chromosomal
location of most of these full-length genes have been determined.

     The efforts of the  Exploratory  Research  group are focused on development
and  implementation  of  new  technologies   useful  in  the  identification  of
medically-relevant  gene candidates.  Responsibilities of this group include new
methodologies for cDNA library construction, chromosome mapping, optimization of
full-length gene cloning and development of new methods for gene analysis.  This
group is also  currently  responsible  for  efforts in  microbiology,  including
construction  and  analysis of  microbial  genome  libraries  and  selection  of
candidate genes which may be useful in vaccine and immunotherapeutic programs.

     Protein Expression Division. The purpose of the Protein Expression Division
is to provide proteins in a form suitable for in vitro and in vivo testing.  The
Protein  Expression  Division uses  bacterial,  insect and mammalian  expression
systems that have been engineered to express abundant  amounts of proteins.  The
Company's  therapeutic  protein  production  facilities  include 15  bioreactors
ranging in capacity from 2 to 100 liters. The Protein  Expression  Division also
purifies  potential  therapeutic  proteins,  enzymes  that may be  useful in the
discovery of small molecule  drugs and bacterial  proteins that may be useful as
vaccine components. This division will also oversee the contract



<PAGE>



production of cGMP materials by third parties for preclinical  qualification and
Phase I  clinical  studies  and  will  also  oversee  the  construction,  and be
responsible for the operation,  of the Company's proposed pilot scale production
and process development facility.

     Through  February 15, 1997 the Company has produced and purified  more than
100 novel human  proteins in amounts  sufficient to test for  activity.  In some
cases, the Company also provides highly purified  proteins to its  collaborators
for further analysis.

     Cell Biology Division.  The Cell Biology Division determines the activities
of purified  therapeutic  protein  candidates on cells in tissue  culture.  This
division is also developing  high  throughput  screens to assess the activity of
the  Company's  therapeutic  protein  candidates.  This division uses over 75 in
vitro  assays  to  evaluate   biological   activities  of  therapeutic   protein
candidates,  many of which are used to determine  whether such  candidates  have
biological  activities relevant to serious unmet medical needs. Examples of such
in vitro  tests  include  assays that detect  proteins  that have an  anti-viral
effect,  proteins  that are  capable of  prolonging  the life of neurons  and of
promoting  neural cell  growth,  proteins  that have  anti-cancer  activity  and
proteins that affect the growth and differentiation of hematopoietic cells.

     Pharmacology  Division. The Pharmacology Division tests for in vitro and in
vivo activity of  therapeutic  protein  candidates and is also  responsible  for
safety studies.  The division is responsible  for preclinical  animal testing of
the Company's  therapeutic  protein  product  candidates and employs a number of
standard  assays for  determining  biological  function.  The  division has also
developed  several  specialized  assays to test biological  function of specific
therapeutic  proteins.  The  Company  has  recently  expanded  this  division to
increase its efforts to develop therapeutic protein product candidates,  and the
Company  expects to continue  to expand the  division  as  necessary  to support
preclinical  and  clinical  development.  The  Company  intends to  establish  a
clinical  management  team to manage and oversee  clinical  trials.  The Company
intends to  utilize  contract  research  organizations  to  conduct  toxicology,
pathology and clinical trials on the Company's lead therapeutic  protein product
candidates.

AREAS OF PRODUCT DEVELOPMENT


     The Company  believes that the genes it identifies have the potential to be
valuable for the  development of a wide range of healthcare  products in some or
all of the following areas:

     Therapeutic  Proteins.  Therapeutic proteins are recombinant human proteins
that  in  native  or  modified  form  exert  medically  useful   physiologic  or
pharmacologic  activity.  By discovering and isolating genes, the Company may be
able to cause the genes that code for  therapeutic  proteins  to  express  those
proteins.  Therapeutic  proteins  may be useful for the  treatment  of diseases,
including  inflammatory  and autoimmune  diseases,  neurodegenerative  diseases,
cardio-pulmonary diseases and other diseases caused by insufficient or defective
proteins  resulting  from a missing  or  defective  gene.  Therapeutic  proteins
currently in clinical use include  interferon,  insulin,  human growth  hormone,
DNAse, G-CSF, GM-CSF and erythropoietin.

     Currently,  the Company is conducting  pre-clinical  development studies on
the following proteins:

Myeloid Progenitor  Inhibitory  Factor-1 (MPIF-1) Myeloid Progenitor  Inhibitory
Factor-2  (MPIF-2)  Keratinocyte  Growth Factor-2  (KGF-2)  Monocyte  Attractant
Protein (MAP) Monocyte Colony  Inhibition  Factor-1  (MCIF-1)  Fibroblast Growth
Factor-10 (FGF-10)

     MPIF-1 and MPIF-2.  MPIF-1 and MPIF-2 are members of the chemokine  family.
The  Company  has shown that  MPIF-1 and MPIF-2 in in vitro and in vivo  studies
inhibit the  differentiation and growth of bone marrow cells (myeloid progenitor
cells)  responsible  for  maintenance  of red and  white  blood  cells.  Myeloid
progenitor cells are destroyed by many forms of cancer chemotherapy resulting in
severe  leukopenia,  thrombocytopenia  and anemia.  By preventing  the growth of
myeloid  progenitor  cells  during  aggressive  cancer  chemotherapy,  it may be
possible  to reduce  the  destruction  of these  cells  allowing  the more rapid
repopulation of red and white blood cells in the circulation. This, in turn, may
reduce the  incidence of serious  infection,  anemia and  coagulation  disorders
associated with cancer chemotherapy.



<PAGE>





     KGF-2  and  MAP.  KGF-2  is  a  member  of  the  Fibroblast  Growth  Factor
superfamily and MAP is a member of the chemokine family of proteins. The Company
has shown in in vivo tests that KGF-2,  and in vitro  tests that MAP,  stimulate
the growth of epithelial  cells.  Both  proteins  have  potential for use in the
treatment  of topical  (skin)  ulcers,  surgical  and other wounds and burns and
possibly other conditions affecting epithelial cells. In addition,  KGF-2 may be
useful  in  the  treatment  of  mucositis   (frequently  a  toxicity  of  cancer
chemotherapy) and/or acute renal failure.

     MCIF-1.  MCIF-1 is also a member of the chemokine  family.  The Company has
shown in in vivo tests that MCIF-1  inhibits the  differentiation  and growth of
macrophages  and monocytes,  white blood cells involved in  inflammation.  In in
vivo animal  studies,  MCIF-1 has been shown to reduce the severity of cartilage
and bone  destruction  associated  with a model of arthritis,  and to reduce the
severity of septic shock in a model of that disease.

     FGF-10. FGF-10 is a member of the Fibroblast Growth Factor superfamily. The
Company has shown in in vivo studies  that FGF-10  protects  motor  neurons from
destruction  caused  by  experimental  trauma.  These  models  have been used to
identify  agents which may have use in preventing or treating  neurodegenerative
diseases such as Amyotrophic Lateral Sclerosis (Lou Gehrig's Disease).

     As a result of the SB  Amendment,  in June 1996,  the Company  obtained the
right to  designate  six  therapeutic  proteins  at any one  time for  exclusive
development and commercialization by the Company. Schering-Plough and SmithKline
Beecham  have  certain  co-development  rights  with  respect  to these  product
candidates.  Subject  to  certain  limitations,  the  Company  has the  right to
substitute  new  therapeutic  proteins for  therapeutic  proteins that have been
licensed to third parties under  procedures  set forth in the SB Amendment,  are
the subject of clinical  trials or the right to which have been  surrendered  by
the Company. See " -- Collaborative Arrangements."

     All of the Company's  therapeutic  protein  product  candidates  are in the
early stages of  preclinical  testing.  Accordingly,  the results of preclinical
testing  to date may not be  indicative  of  results  that will be  obtained  in
clinical  trials.  As further  results of  preclinical  tests are received,  the
Company may abandon particular projects which it might otherwise have considered
promising.  Additionally,  there can be no assurance that clinical  trials as to
any particular product candidate, if commenced, will be successful.

     Small  Molecule  Drugs.  The  Company  believes  that  knowledge  of a more
complete set of genes and the proteins  they express will enable  pharmaceutical
companies  to design  and screen  pharmaceutical  products  in a more  efficient
fashion by  providing  logical  specific  targets  for  discovering  drugs.  The
discovery of new drugs often involves  screening a large family of synthetic and
natural  products to  determine  their  impact on proteins  expressed  by genes.
Increasingly,  automated biochemical assays that test the ability of proteins to
bind to and  modify  the  activity  of  purified  proteins  are used to test the
efficacy and selectivity  (i.e.,  the ability to affect only the desired protein
targets and not other  proteins  expressed in the human body) of new drugs.  The
undesired  binding of a drug to other proteins not detected by a screening assay
can result in toxicity or other  undesirable side effects.  The Company believes
that the genes it discovers  may  contribute  to screening  assays by permitting
more complete sets of target  proteins to be assembled for an assay.  SmithKline
Beecham is currently using proteins expressed by genes identified by the Company
in a number of screening assays used to identify new drugs.

     Diagnostics. The Company also believes that the genetic data obtained by it
could lead to the development of diagnostic tests for diseases. Such diagnostics
would likely be focused on four different  applications.  First, the comparative
analysis of genes  expressed  during the  progression  of tissues from normal to
fully  diseased  states may permit more  accurate  staging of diseases,  thereby
facilitating the diagnosis and treatment of the disease.  Proteins  expressed by
"marker" genes associated with a specific disease can be a starting point in the
synthesis of antibodies,  the principal  components in many diagnostic  systems.
Second,  the  Company's  genetic data may enable the  development  of methods to
determine individual  predisposition to disease.  Third, tests could be designed
to detect inherited  diseases in fetal cells.  Fourth, the Company believes that
the genetic data obtained from the sequencing of disease-causing  microorganisms
may  allow  for the  rapid  determination  of the  presence  and  activity  of a
particular  microorganism in an infected person.  The development of diagnostics
based on genes  identified by the Company is part of SmithKline  Beecham's field
under the SB Collaboration Agreements.

     Antimicrobial  Agents and  Vaccines.  The  Company has  retained  exclusive
rights to utilize its information and technology to develop antimicrobial agents
and vaccines and, accordingly, is identifying and characterizing genes of



<PAGE>



microorganisms,  including bacteria, viruses, fungi and multicellular parasites.
The Company  anticipates using its automated  sequencing  techniques to identify
genes expressed by microorganisms  and parasites during resting,  vegetative and
pathogenic states of infection. The Company believes that genes expressed during
the pathogenic phase of a microorganism may be found to be required for disease.
Each such gene (called a virulence  gene) might be a candidate  target for a new
antibiotic or vaccine.  The Company also  believes  that  knowledge of genes and
proteins  expressed by pathogenic  organisms may facilitate  the  development of
gene-based and antibody-based diagnostic assays for infectious diseases.

     Analysis of the total genome of a  microorganism  should provide a complete
picture of all genes encoded by the  microorganism.  With this information,  the
Company  believes it may be possible to choose  protein  candidates  that may be
useful as  vaccine  components  or  antigens  required  for the  development  of
immunotherapeutics. The Company also believes that a high throughput approach of
gene identification may identify new genes capable of producing  antibiotics and
other useful  secondary  metabolites.  Additionally,  the Company has  completed
sequencing pathogenicity islands of Escherichia coli, and, in collaboration with
TIGR, has sequenced the essentially complete genome of Streptococcus  pneumonia.
Patent applications have been filed by the Company on these genomes.

     In January 1996, the Company  completed  sequencing the majority of the DNA
comprising  the genome of the bacterium  Staphylococcus  aureus.  Staphylococcus
aureus is the most frequent  cause of infections in hospitals.  The bacterium is
also the major cause of toxic shock syndrome and wound infections.  Many strains
are resistant to most  antibiotics,  and there is concern that the organism will
soon  develop  widespread  resistance  to one of the  last  remaining  effective
antibiotics,  vancomycin.  The  work  on  Staphylococcus  aureus  is  the  first
application of the Company's  large scale  sequencing  technology to a non-human
organism. Staphylococcus aureus was selected for both its medical and commercial
importance.

     The Company also owns certain  intellectual  property rights related to the
genome  sequences  of  three  other  microorganisms,   Haemophilus   influenzae,
Mycoplasma   genitalium   and   Methanococcus   jannaschii,   arising  from  its
collaboration  with TIGR.  In  addition,  the  Company  intends  to file  patent
applications  related to genes of  Helicobacter  pylori,  another  microorganism
sequenced by TIGR.  TIGR has recently  been focusing its  sequencing  efforts on
infectious and other  microorganisms,  and the Company will own any intellectual
property  arising from these efforts.  In July 1995, the Company  entered into a
collaboration with MedImmune to create vaccines and  immunotherapeutic  products
based  on the  genomes  of  infectious  microorganisms.  See  "--  Collaborative
Arrangements."

     Gene Therapy.  The Company believes that its gene discovery  technology may
identify new genes that can be introduced  into the body through the use of gene
therapy techniques.  Many diseases result when specific proteins are produced in
inappropriate quantities, in a defective manner or not at all. Gene therapy is a
novel  approach to the  treatment of disease in which genes are inserted  into a
patient's  cells for the purpose of inducing these cells to produce  therapeutic
proteins or to replace  defective or missing genes. In other  applications,  the
Company  believes  that gene therapy may induce cells to secrete  proteins  that
enhance the immune system's ability to recognize and attack a specific  disease.
Gene therapy might also allow  localized  delivery of proteins that cannot reach
the appropriate site through conventional  methods of administration.  There are
currently  no gene  therapy  products  on the  market,  although  a  number  are
undergoing   clinical  trials.   In  June  1996,  the  Company  entered  into  a
collaboration  with  Schering-Plough  with  respect  to  use  of  the  Company's
technologies for gene therapy. See "-- Collaborative Arrangements."

     Antisense  Drugs.  The Company believes that the knowledge of the structure
of genes developed  through the use of its sequencing  technology may facilitate
the development of antisense  drugs.  Antisense  technology  involves the use of
short oligonucleotide sequences,  complementary to the gene, that, after binding
to the mRNA encoded by the gene, inhibit the synthesis of the protein encoded by
the gene. If, for example, the target gene expressed a protein involved in rapid
cell growth leading to a particular cancer, then use of the antisense drug could
have the potential of inhibiting the synthesis of the target protein  encoded by
the particular  gene and lead to restoration of normal growth.  Antisense  drugs
could  also be of  potential  benefit in  diseases  where  production  of excess
protein  leads to the disease  state.  There are  currently no  antisense  drugs
approved for treatment.



<PAGE>








COLLABORATIVE ARRANGEMENTS


     Agreements with SmithKline  Beecham.  In May 1993, the Company entered into
the SB Collaboration Agreements pursuant to which SmithKline Beecham was granted
certain exclusive rights to develop and commercialize therapeutic and diagnostic
products  within  the "SB  Field"  (as  defined  below)  based  on  human  genes
discovered  by  the  Company.  Pursuant  to  the  SB  Collaboration  Agreements,
SmithKline  Beecham  has  paid to the  Company  an  aggregate  of  $125  million
including  $55.1  million which was allocated to the purchase of an aggregate of
1,351,738 shares of Common Stock.

     In June 1996, the SB Collaboration  Agreements were  substantially  amended
(the "SB  Amendment").  The SB  Amendment  allowed the  Company  and  SmithKline
Beecham  together  to  enter  into  collaboration   agreements  with  additional
pharmaceutical  companies ("New Collaboration  Partners") in the SB Field (other
than diagnostics and animal healthcare in which SmithKline Beecham has generally
retained  exclusive  rights).  The "SB  Field" is the field of human and  animal
healthcare, other than gene therapy (excluding gene therapy vaccines), antisense
products and the use of genes for synthesizing drugs that were known at the time
the SB  Collaboration  Agreements were executed.  In addition,  the SB Amendment
provides  that each of the Company  and  SmithKline  Beecham  can  independently
designate  potential  therapeutic  proteins for its  exclusive  development  and
commercialization (e.g. marketing or outlicensing) provided that it is the first
among the  Company,  SmithKline  Beecham and the New  Collaboration  Partners to
select the  protein  and  certain  research  requirements  are met prior to such
designation.  Under the SB Amendment,  the Company can designate six therapeutic
proteins for its exclusive  development and  commercialization  at any one time.
Subject  to  certain   limitations,   the  Company  may  substitute   additional
therapeutic  proteins for any of the six therapeutic  proteins designated by the
Company  (i)  which  have been  licensed  by the  Company  to third  parties  in
accordance with the SB Amendment, (ii) which are the subject of clinical studies
by the  Company  and (iii)  the  rights to which  have been  surrendered  by the
Company.  SmithKline  Beecham's right to select therapeutic  proteins during the
initial  research term of the SB  Collaboration  Agreements  is not limited.  In
addition,  the SB  Amendment  provides  that each of the Company and  SmithKline
Beecham may  independently  (i)  research,  develop and  commercialize  antibody
products  directed  against  antigens  derived  from the human  genome  database
created by the Company and (ii) identify and use novel molecular targets derived
from the human  genome  database  created by the Company to discover and develop
small  molecule  pharmaceutical  products,  provided  that the Company  will not
initiate  screening of such targets for three years from the  effective  date of
the SB Amendment and will not use certain  targets  subject to  agreements  with
third parties, subject to certain other restrictions. The SB Amendment restricts
the Company from entering into collaborations with third parties (other than New
Collaboration  Partners  and  Takeda)  in the SB Field (i)  during  the  initial
research  term  except  with  respect  to  products  for which the  Company  has
exclusive development rights and (ii) during the initial research term and for a
period  thereafter  with  respect to certain  products  which are the subject of
research plans submitted by SmithKline Beecham or a New Collaboration Partner or
Takeda prior to the expiration of the initial research term.

     The SB  Amendment  provides  that  SmithKline  Beecham and the Company will
share  equally in any license fees and product  development  milestone  payments
paid under New  Collaboration  Partner  Agreements,  and that the  Company  will
receive all royalties and research support payments under such New Collaboration
Partner Agreements.  The SB Collaboration Agreements provide for payments to the
Company of royalties on net sales of products based on the Company's  patents or
technologies  within the SB Field ("SB Products") sold by SmithKline Beecham (or
its licensees) and milestone  payments in connection  with the development of SB
Products. The Company has an option to co-promote SB Products sold by SmithKline
Beecham, on a country-by-country basis, in the United States, Canada, Mexico and
Europe (subject to certain  limitations as to rights granted to Takeda and other
parties). If the Company develops and markets or outlicenses a product in the SB
Field  pursuant to its rights  under the  agreements  with  SmithKline  Beecham,
SmithKline  Beecham  will  generally  be  entitled to  royalties  or to share in
milestone  payments and license fees received by the Company from licensees with
respect  to  such  products.   The  New  Collaboration  Partner  Agreement  with
Schering-Plough  includes  an  option  for  Schering-Plough  to  co-develop  and
co-commercialize  up to two  products  in the SB Field to which the  Company has
exclusive  development and  commercialization  rights under the SB Collaboration
Agreements. The SB Collaboration Agreements include an



<PAGE>



option for SmithKline Beecham to co-develop and co-commercialize products in the
SB Field to which the Company has exclusive  development  and  commercialization
rights under the SB Collaboration  Agreements and for which  Schering-Plough has
not exercised its option to co-develop and co-commercialize.  SmithKline Beecham
will also be  entitled to  royalties  on, and an option to  co-promote  products
outside  the SB Field  sold by the  Company  which are  based on or  incorporate
patents or information  developed by SmithKline  Beecham based on the Human Gene
Technology of the Company.

     The initial research term under the SB Collaboration  Agreements  continues
through June 2001.  After  expiration of the initial  research term, the Company
will  have all  rights to the  Company's  Human  Gene  Technology,  except  that
SmithKline  Beecham will retain  rights to the Company's  Human Gene  Technology
pursuant to research plans meeting certain specified criteria submitted prior to
expiration of the initial term,  Takeda will retain rights granted to it under a
license  agreement  prior to  expiration  of the initial  research  term and New
Collaboration   Partners   will  retain   rights   granted  to  them  under  New
Collaboration Partner Agreements. See "-- Other Collaborations in the SB Field."
SmithKline  Beecham  has the right to extend  the  research  term for up to five
additional  years by making  certain  payments,  which would extend the time for
submitting  research  plans  as to  therapeutic  products  other  than  antibody
products and therapeutic protein products.

     The Company has agreed that it will make  available 35 gene  sequencers and
related  personnel and reagents to sequence genes at the direction of a research
committee.

     Other Collaboration Agreements in the SB Field. In June 1996 and July 1996,
the Company and SmithKline  Beecham entered into the New  Collaboration  Partner
Agreements  with  Schering-Plough,  Synthelabo,  and  Merck.  Each  of  the  New
Collaboration  Partner  Agreements  provides the New  Collaboration  Partner the
rights and licenses to access and use the Company's  Human Gene  Technology,  as
well as biological  information  developed by the Company and SmithKline Beecham
prior  to,  and in the case of the  Company,  after the  effective  date of such
Agreement, to discover, develop and commercialize products based upon or derived
from such Human Gene  Technology  in the SB Field  (other than  diagnostics  and
animal  healthcare).  Each New  Collaboration  Partner may also  designate,  and
receive  exclusive  license  rights  under the  Company and  SmithKline  Beecham
patents and  technology  to,  potential  therapeutic  protein  products  for its
exclusive  development  and  commercialization,  subject,  in certain cases,  to
certain  restrictions  as to the  number  of  therapeutic  proteins  that can be
claimed,  and subject to achievement of certain research  requirements  prior to
such  designation.  Each of the New  Collaboration  Partners is obligated to pay
license  fees,  research  payments,  and milestone  payments in connection  with
development  of products  under the  agreement  and  royalties.  Each of the New
Collaboration  Partner  Agreements  is for an initial  research term expiring in
June 2001. Each New  Collaboration  Partner has the right to extend the term for
up to five additional years by making certain payments. The Company cannot enter
into additional  agreements similar to the New Collaboration  Partner Agreements
without  the  consent  of  SmithKline  Beecham,  Takeda  and  certain of the New
Collaboration Partners.

     The Company will be entitled to one-half of all license fees and  milestone
payments  and to all  royalties  due from  each New  Collaboration  Partner.  In
addition, each New Collaboration Partner will make research payments directly to
the  Company  for the  duration of the  initial  research  term which  continues
through June 2001.  Aggregate  license fees and research  payments due under the
New  Collaborative  Partner  Agreements  are $140  million  during  the  initial
research term, of which the Company will be entitled to $87.5  million,  payable
in equal installments over a five-year period.  $17.5 million have been received
by the Company to date.

     The New Collaboration  Partner Agreement with  Schering-Plough  includes an
option for  Schering-Plough to co-develop and  co-commercialize up to two of the
Company's  products  in  the  SB  Field  to  which  the  Company  has  exclusive
development and commercialization rights under the SB Collaborative Agreements.

     SmithKline Beecham and Takeda entered into a License Agreement (the "Takeda
License  Agreement")  relating to the development and sale of products in the SB
Field based upon rights licensed from the Company.  The Company will be entitled
to all royalty  payments and one-half of the milestone  payments due from Takeda
to SmithKline  Beecham under the Takeda  License  Agreement on sales of products
developed by Takeda  under the  agreement.  In  addition,  at the same time that
SmithKline Beecham and Takeda entered into the Takeda License Agreement,  Takeda
and the Company entered into an Option and License  Agreement  pursuant to which
Takeda was granted an exclusive  option to license  rights  under the  Company's
patents  and  technology  in the  field of human  healthcare  (other  than  gene
therapy,  antisense and diagnostics) to make and sell a limited number (equal to
the



<PAGE>



number of collaboration  partners other than SmithKline  Beecham and Takeda with
which the  Company  enters  into  collaboration  agreements  in the SB Field) of
products in Japan. In consideration of the grant of the option,  Takeda paid the
Company $5 million and agreed to pay to the Company  royalties based on the sale
of Takeda  products  covered by the Option and  License  Agreement  and  certain
milestone   payments.   The  option  period  terminates  three  years  following
expiration of the initial research term under the SB Collaboration Agreements.

     Collaboration  Agreements  Outside of the SB Field. The Company has entered
into collaboration  agreements with respect to the development of products based
on the  Company's  gene  discovery  research  outside  of the  SB  Field.  These
collaboration  agreements,  which generally  provide for milestone  payments and
royalties  and in most cases up front  license  fees and/or  research  payments,
include the following:

     A Collaboration  and License  Agreement with MedImmune entered into in July
     1995 with respect to the development of drugs based upon infectious  agents
     sequenced  by the Company or TIGR or as to which the  Company has  licensed
     the  rights.  Programs  under the  agreement  with  MedImmune  include  the
     creation   of  vaccines   and   immunotherapeutics   for   non-encapsulated
     Haemophilus  influenzae,   Streptococcus   pneumoniae,   Escherichia  coli,
     Staphylococcus aureus, Helicobacter pylori and Borellia bergdorferi;

     A Research  Collaboration  Agreement  with Pioneer  entered into in January
     1996 under which Pioneer was granted  exclusive license rights in the field
     of corn genomics;

     A License  Agreement with Roche entered into in March 1996, under which the
     Company  is  responsible  for  sequencing  and  assembling  the  genome  of
     Streptococcus  pneumoniae,  a  bacterial  pathogen  responsible  for severe
     respiratory  and  other   infections  and  under  which  Roche  received  a
     non-exclusive  license to use this  information  to identify  potential new
     anti-infectives and antibiotics;

     A Collaboration and License Agreement with Schering-Plough  relating to the
     field of human gene therapy  (including gene therapy vaccines to the extent
     the  Company  has the  right to do so),  under  which  Schering-Plough  was
     granted  (i) a  non-exclusive  license  to use  the  Company's  Human  Gene
     Technology  to conduct  research  and (ii) an option to obtain an exclusive
     license to specific genes in the field of gene therapy;

     An  agreement  entered  into in October  1996 with  Pharmacia,  whereby the
     Company granted to Pharmacia (i) a nonexclusive license to conduct research
     and to make, use and sell products based on genes of Staphylococcus  aureus
     and the pathogenicity islands of Escherichia coli sequenced by the Company,
     (ii) the right to obtain an exclusive license to certain products and (iii)
     the right to  negotiate  to  obtain  an  exclusive  license  as to  certain
     microbial  genomes as to which the  Company  desires to grant an  exclusive
     license; and

     An agreement  entered into in November  1996 with OraVax with respect to an
     exclusive  license granted by MedImmune and the Company with respect to use
     of the Company's  and  MedImmune's  technology  for a  Helicobacter  pylori
     vaccine.

     As of February 15, 1997,  the Company had entered  into  approximately  200
material   transfer   agreements   with  96   academic   institutions   covering
approximately  1,000  gene  sequences,   cDNAs  and  proteins.  The  Company  is
continuing to negotiate additional material transfer and license agreements. The
purpose of these  agreements is to expand research and  development  relating to
the  Company's  gene   information  by  providing   academic   researchers  with
proprietary gene sequence information and related materials which enable them to
explore  the  biological   activity  and  potential  medical  utility  of  newly
discovered human genes. Most of these material transfer  agreements grant to the
Company a license,  with established  royalty rates, to any invention  resulting
from the use of gene sequence  information or related materials  provided by the
Company. A relatively small number of the material transfer agreements signed by
the Company  provide for an option to license any invention  resulting  from the
use of the Company's gene  sequencing  information.  The Company has not, in any
case,  signed a material transfer  agreement with an academic  institution which
does not  provide  for a license or option to  exclusive  rights for  inventions
resulting from use of the Company's information.  In addition,  TIGR, SmithKline
Beecham and Takeda have also  entered into  material  transfer  agreements  with
academic  institutions.  The Company is also  entitled to rights with respect to
inventions  resulting  from use of sequence  information  and related  materials
under such arrangements.

     Agreements  with TIGR. In October 1992 the Company  entered into a Research
Services  Agreement  and  an  Intellectual   Property  Agreement  with  TIGR,  a
not-for-profit research institute. TIGR initially performed most of the



<PAGE>



gene sequencing and made the sequences available to the Company and continues to
perform  genomic  research,   including  sequencing  the  genomes  of  microbial
organisms.  The Company currently has a sequencing and analysis capacity greater
than that of TIGR. The Company  believes that it benefits from, but is no longer
dependent upon, TIGR's assistance for achieving  research and development goals.
Pursuant to the agreements  with TIGR,  the Company has exclusive  rights to all
intellectual property resulting from TIGR's gene sequencing and other research.

     Pursuant to these  agreements,  a Lease Funding  Agreement  entered into in
March 1993 and a subsequent  agreement  entered into in April 1993,  the Company
has committed to provide an aggregate of approximately  $85 million to TIGR over
a ten-year  period,  ending  September 2002, of which $70 million  consists of a
research grant and equipment funding for TIGR's scientific  research relating to
determining human genes and their functions and uses. Through February 15, 1997,
the Company had paid approximately $44 million pursuant to these agreements. See
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations."

     TIGR operates independently from the Company, and the Company does not have
the right to control or direct TIGR's  activities.  TIGR  receives  funding from
government  sources in addition to funding from the Company.  Under the Research
Services  Agreement  and the  Intellectual  Property  Agreement,  for a ten-year
period ending 2002, TIGR is obligated to disclose to the Company all significant
developments  relating to information or inventions  discovered at TIGR, and the
Company will own (on a royalty-free  basis) all of TIGR's interest in inventions
and  patent  rights  arising  out of  TIGR's  research  during  the  term of the
agreement  (including  rights  arising from  research  funded by third  parties,
except  for  research  funded  by  certain   governmental   and   not-for-profit
organizations  as to which  the  Company  has been  granted  a  royalty-bearing,
worldwide, perpetual, exclusive license, subject to a non-exclusive royalty-free
license retained by such organization).

     TIGR has  completed  the  sequencing  of the  genomes of several  microbial
organisms,   including   nonencapsulated   Haemophilus  influenzae,   Mycoplasma
genitalium,  and Methanococcus  jannaschii.  The Company has exclusive rights in
the  intellectual  property  resulting from this research.  TIGR has advised the
Company that it plans to sequence complete genomes of other organisms that cause
diseases  in  humans  or which  may  have  other  uses,  such as  industrial  or
agricultural  uses.  TIGR has agreed with the Company that it will  sequence the
genome of certain specified bacterial organisms.

     Pursuant to the Human cDNA Database  Agreement,  TIGR has generally  agreed
not to publish the sequences of any human cDNAs sequenced at TIGR and,  instead,
will contribute  those sequences to the Human cDNA Database  (described  below).
TIGR has retained the right to publish  sequence data included in the Human cDNA
Database on the same basis as researchers who are provided access to proprietary
information  in the  Human  cDNA  Database.  See "--  The  Human  cDNA  Database
Agreement." As set forth below, the Human cDNA Database Agreement will terminate
in April  1997.  TIGR  has  agreed  not to  publish  any  other  information  or
inventions (other than information with respect to non-animal genes),  including
human cDNA's after the  termination  or  expiration  of the Human cDNA  Database
Agreement,  resulting from TIGR's research until six months after TIGR discloses
the information or invention to the Company, provided that this six-month period
can  be  extended  to  up  to 18  months  under  certain  circumstances  if  the
information  or  invention  relates  to a  product  that  the  Company  and  its
collaborators  intend to  develop.  With  respect  to  non-animal  genes  (which
includes  microbial  agents),  TIGR has  agreed not to  publish  information  or
inventions  until at least six months after  substantially  all  information and
inventions resulting from studies being conducted by TIGR have been disclosed to
the Company.

     The Human cDNA  Database  Agreement.  In July 1994,  the Company,  TIGR and
SmithKline  Beecham  reached an agreement to contribute a number of partial cDNA
sequences  to a database  (the  "Human cDNA  Database")  that is  accessible  to
academic scientists and researchers at non-profit  institutions that sign access
agreements.  To date,  approximately  160,000  human  cDNAs  resulting  from the
collaboration  between the Company and TIGR have been  contributed  to the Human
cDNA Database,  including 50,000 cDNAs sequenced by the Company.  The Human cDNA
Database  Agreement  provides  that the Human cDNA  Database is not available to
persons or entities  engaged in commercial  activities.  In October  1996,  TIGR
notified  SmithKline  Beecham and the Company of its decision to  terminate  the
Human cDNA Database  Agreement  according to its terms,  such  termination to be
effective in April 1997. Upon termination, all Company sequences will be removed
from  the  database  and the  remaining  TIGR  sequences  may be  made  publicly
available without restriction.

     Potential  Dispute with TIGR.  The Company's  agreements  with TIGR include
non-disclosure  obligations  on the part of TIGR.  The Company and TIGR have had
recent disagreements concerning the scope of these non-disclosure



<PAGE>



obligations.  It has come to the Company's attention that certain disclosures by
TIGR of sequence and other  information  which the Company  believes may violate
such  non-disclosure  obligations  may have taken place or may take place in the
future.  Disclosure of  information  by TIGR in violation of its  non-disclosure
obligations  may  negatively  affect  the  Company's  ability  to obtain  patent
protection on inventions  described  therein.  The Company is investigating this
situation and will  determine  what action,  if any,  should be taken to prevent
such  disclosures.  See "-- Patents  and  Proprietary  Rights."  There can be no
assurance  that these  disagreements  will not  materially  affect the Company's
relationship with TIGR. However,  TIGR has been primarily  sequencing  microbial
genes and not human genes in recent years, and the Company does not believe that
it is or will be dependent on TIGR.

PATENTS AND PROPRIETARY RIGHTS


     The  Company's  commercial  success is  dependent in part on its ability to
obtain  patent  protection on genes  discovered  by it. The Company  applies for
patent protection for genes identified by partial sequencing and,  subsequently,
for  those  genes  which  it fully  sequences.  However,  there  is  substantial
uncertainty as to the patentability of genes based on partial sequences. Even if
patent  protection is afforded for such sequences,  it may not provide effective
marketing  exclusivity.  The Company's  business  might be enhanced by obtaining
patent  protection  based on partial  gene  sequences,  but the Company does not
believe that its commercial success will be materially  dependent on its ability
to do so. The Company has isolated and obtained full-length sequence information
for many of the genes that the  Company or its  collaborators  intend to develop
further and has filed,  and continues to file,  for patent  protection  based on
such full-length sequences.  However, the Company does not expect to isolate and
fully sequence a significant portion of the partial gene sequences it discovers.
See "-- Company Technology and Research."

     The patent positions of biotechnology  firms generally are highly uncertain
and involve complex legal and factual questions.  There is a substantial backlog
of biotechnology patent applications at the PTO, and no clear policy has emerged
regarding the breadth of claims  covered in  biotechnology  patents.  There have
been,  and  continue  to be,  intensive  discussions  on  the  scope  of  patent
protection for both gene fragments and full-length  genes.  There have also been
proposals  for  review  of the  appropriateness  of  patents  on genes  and gene
fragments.  There can be no  assurance  that these or other  proposals  will not
result in  changes  in, or  interpretations  of,  the  patent  laws  which  will
adversely  affect  the  Company's  patent  position.  The  biotechnology  patent
situation  outside the United  States is even more  uncertain  and is  currently
undergoing review and revision in many countries.

     As of  February  15,  1997,  the  Company had filed  United  States  patent
applications  with  respect to more than 230  full-length  human genes and their
corresponding proteins. The Company has also filed U.S. patent applications with
respect to all or portions of the genomes of five infectious  microorganisms and
one non-infectious microorganism.  As of February 15, 1997, the Company has five
issued U.S. patents covering  full-length human genes, which expire between 2013
and 2014.  There can be no assurance  that the remaining  applications  covering
full-length genes and their  corresponding  proteins will result in the issuance
of any  patents.  While the Company  identifies  multiple  uses for genes it has
fully  sequenced,  these  uses  may  not be  sufficient  to meet  the  statutory
requirements  for  patentability  in all  cases.  Additionally,  in  view of the
substantial  number  of  genes  that  may be  covered  by the  Company's  patent
applications,  the Company  cannot  predict what issues may arise in  connection
with the  Company's  patent  applications  or the timing of the grant of patents
with respect to genes covered by such patent applications.  Moreover, in certain
instances,  the Company will be  dependent  upon its  collaborators  to file and
prosecute patent applications.

     The Company also has filed United States patent applications  claiming more
than 190,000 partial human gene sequences.  These  applications  seek to protect
partial human and non-human gene sequences,  the full-length gene sequences that
include the partial  sequences,  as well as products derived  therefrom and uses
therefor.  These applications identify possible biological functions for some of
the genes based in part on a comparison to genes  included in public  databases,
but do not  contain  any  laboratory  or  clinical  data  with  respect  to such
biological  functions.   There  are  certain  court  decisions  indicating  that
disclosure  of  a  partial  sequence  may  not  be  sufficient  to  support  the
patentability  of a full length sequence.  In view of these court decisions,  as
well as the position of the PTO  referred to below,  the Company  believes  that
there  is  significant  risk  that  patents  will  not  issue  based  on  patent
disclosures limited to partial gene sequences. Finally, even if patents issue on
the basis of partial gene sequences,



<PAGE>



there  is  uncertainty  as to the  scope  of  the  coverage,  enforceability  or
commercial protection provided by any such patents.

     In June 1991, the National  Institutes of Health (the "NIH") filed a patent
application  seeking  protection  for a  substantial  number of genes based upon
partial gene sequences. The application generated substantial controversy in the
scientific  community  regarding  the  patentability  of gene  fragments and the
full-length  gene based on only partial  sequencing  of genes,  particularly  in
cases where the biological  function of the full-length  gene is not identified.
An  examiner  in the  PTO  rejected  the  patent  claims  contained  in the  NIH
application and the rejection was not appealed by the NIH. The Company  believes
that the  patent  applications  that have  been  filed by the  Company  based on
partial gene sequences may be considered similar to the application filed by the
NIH.  To date,  the Company  has not  received  notice from the PTO of a similar
rejection of its patent applications covering partial gene sequences.

     Publication of information  concerning  genes prior to the time the Company
applies for patent  protection  based on the  full-length  gene could  adversely
affect the Company's  ability to obtain patent  protection with respect to genes
identified by it.  Washington  University has identified  genes through  partial
sequencing  pursuant to funding  provided by Merck & Co. and has  deposited  the
partial  sequences  identified in a public database.  In July 1994, the Company,
TIGR and  SmithKline  Beecham  reached an  agreement  to  contribute a number of
partial cDNA  sequences to the Human cDNA  Database.  Pursuant to the Agreement,
the  Human  cDNA  Database  is  accessible  only  to  academic   scientists  and
researchers at non-profit  institutions that sign access agreements.  In October
1996,  TIGR  notified  SmithKline  Beecham  and the  Company of its  decision to
terminate the Human cDNA Database  Agreement  effective in April 1997.  TIGR and
researchers  who are  provided  access to  proprietary  data in the  Human  cDNA
Database  have  certain  rights to  publish  human cDNA  sequences  in which the
Company has rights.  The  termination  of the Human cDNA  Database  Agreement in
April 1997 will eliminate  limitations on publication of those  sequences in the
Human  cDNA  Database  as of that  date.  While the  Company  believes  that the
limitations  on  publication  of  sequences  in the  Human  cDNA  Database  have
generally been  sufficient to permit the Company to apply for patent  protection
on genes in which it is interested in pursuing further research, there can be no
assurance that such publication will not affect the Company's  ability to obtain
patent protection for some genes in which it may have an interest, which, in the
case of genes of commercial  significance,  could have a material adverse effect
on the Company. See "-- Collaborative  Agreements -- Agreements with TIGR -- The
Human cDNA Database Agreement" and " -- Potential Dispute with TIGR."

     In January  1997,  TIGR,  in  collaboration  with the  National  Center for
Biological  Information (NCBI),  disclosed  full-length DNA sequences (which are
reportedly in excess of 35,000 sequences)  assembled from partial gene sequences
(EST's)  available in publicly  accessible  databases or sequenced at TIGR. Such
disclosure  might  limit the scope of  claims  or make  unpatentable  subsequent
patent applications filed by the Company on full-length genes.

     In addition,  others have filed and are likely to file in the future patent
applications  which  have  not yet been  published  covering  genes  or  protein
sequences similar or identical to those of the Company.  Moreover, the number of
patent  applications  covering  genes and  proteins  expressed by genes has been
increasing, and is expected to continue to increase, as a result of the increase
in the number of entities conducting genomic research. See "-- Competition." The
Company has been notified that there may be patent  applications filed by others
which  cover  genes for which the Company  has filed  patent  applications.  The
priority  of  competing  patent  claims  would  be  decided  in an  interference
proceeding  before  the PTO.  No  assurance  can be given  that any such  patent
application  of third parties will not have  priority  over patent  applications
filed by the Company or that any patent  applications  filed by the Company will
result in issued patents.

     The  Company is aware that  patent  applications  have been filed by one or
more third  parties with respect to three of the Company's  therapeutic  protein
product  candidates.  The Company has been  granted a patent with respect to DNA
sequences encoding one of the three therapeutic proteins.  However,  proceedings
may be instituted in the PTO to determine  which of the Company or a third party
is entitled to a United States patent  covering such protein and/or DNA encoding
such protein. As to the remaining two therapeutic proteins, the Company has been
notified that the PTO is considering  instituting proceedings to determine which
of the  Company  or a third  party  is  entitled  to a patent  covering  the DNA
encoding one of such therapeutic  proteins,  and it is possible that proceedings
may be instituted as to the third therapeutic protein.

     Accordingly,  there  can  be no  assurance  that  patents  issued  and  any
additional patents, if issued, will provide commercially  meaningful  protection
against competitors. There can also be no assurance that any patent issued to



<PAGE>



the  Company  will  provide  it with  competitive  advantages,  or  will  not be
challenged by others.  Furthermore,  there can be no assurance  that others will
not independently develop similar products which could result in an interference
proceeding in the PTO.  Others may be able to design  around  issued  patents or
develop  products  providing  similar effect to products being  developed by the
Company  based on genes or proteins  expressed by genes which are not covered by
patents issued to the Company.  In addition,  others may discover uses for genes
or proteins other than those uses covered in the Company's patent  applications,
and these other uses may be separately patentable. In such case, the holder of a
use patent  covering an invention as to which the Company has a  composition  of
matter  patent claim could  exclude the Company from selling a product for a use
covered by such use patent.

     The Company's  potential  products may conflict with patents that have been
or may be granted to competitors,  universities or others.  As the biotechnology
industry  expands and more patents are issued and other companies  engage in the
business of discovering genes through the use of high speed sequencers, the risk
increases  that the  Company's  potential  products may give rise to claims that
they  infringe  the  patents of others.  Such other  persons  could  bring legal
actions  against the  Company  claiming  damages and seeking to enjoin  clinical
testing,  manufacturing  and  marketing  of the affected  products.  If any such
actions are successful,  in addition to any potential liability for damages, the
Company  could  be  required  to  obtain a  license  in  order  to  continue  to
manufacture or market the affected products.  There can be no assurance that the
Company would prevail in any such action or that any license  required under any
such patent would be made available on acceptable  terms.  The Company  believes
that there will continue to be significant  litigation in the industry regarding
patent and other  intellectual  property rights. If the Company becomes involved
in such  litigation,  it could  consume a  substantial  portion of the Company's
resources.

     In  addition,  some  of the  genes  (representing  a  small  percentage  of
sequences  covered by the Company's patent filings) covered by two of the patent
applications  in which  the  Company  has  rights  that  have  been  filed  were
identified  pursuant  to  research  funded  by  grants  from the  United  States
Department of Energy ("DOE").  TIGR is also receiving  funding from the DOE with
respect to certain  non-pathogenic  bacterial genomes it is sequencing.  The DOE
has a statutory  right under certain  circumstances  (including  inaction on the
part of the holder of the patent rights to achieve practical  application of the
invention or a need to alleviate public health or safety concerns not reasonably
satisfied by the holder of the patent rights) to grant to other parties licenses
under the patents which may be granted based on research funded by the DOE.

     The  enactment of the  legislation  implementing  the General  Agreement on
Trade and Tariffs has resulted in certain  changes to United  States patent laws
that  became  effective  on June 8,  1995.  Most  notably,  the  term of  patent
protection for patent applications filed on or after June 8, 1995 is no longer a
period of seventeen years from the date of grant.  The new term of United States
patents will  commence on the date of issuance and  terminate  twenty years from
the earliest  effective  filing date of the  application.  Because the time from
filing to  issuance of patent  applications  is often more than three  years,  a
twenty-year   period  from  the  effective  date  of  filing  may  result  in  a
substantially  shortened term of patent  protection,  which may adversely impact
the Company's patent position.

     The Company also relies on trade secret protection for its confidential and
proprietary  information.  The  Company  believes it has  developed  proprietary
procedures for making cDNA libraries and  sequencing  and analyzing  genes.  The
Company has not sought patent protection for these procedures. Additionally, the
Company has developed a substantial  database concerning genes identified by it.
The Company has taken  security  measures to protect its data and  continues  to
explore  ways to further  enhance  the  security  for its data.  However,  trade
secrets  are   difficult  to  protect.   While  the  Company  has  entered  into
confidentiality  agreements  with employees and academic  collaborators  who are
provided data or materials under material transfer  agreements,  there can be no
assurance that such data or material will not be disclosed, that others will not
independently  develop  substantially  equivalent  proprietary  information  and
techniques or otherwise  gain access to the Company's  trade secrets or disclose
such technology, or that the Company can meaningfully protect its trade secrets.
In addition, certain trade secrets important to the Company's business have been
developed  by,  or  are  in  the  possession  of,  TIGR,  including  information
concerning  sequencing  procedures and genes  identified by TIGR.  Although TIGR
also enters into  confidentiality  agreements  with its  employees,  there is an
additional risk that such trade secrets cannot be meaningfully protected.



<PAGE>





COMPETITION


     There is a finite  number of genes in the  human  genome,  and the  Company
believes  that the great  majority  of such  genes have been  identified  by the
Company or others  conducting  genomic  research and that  virtually all will be
identified within several years.  While the Company's goal has been to identify,
establish  the  utility  of and  ultimately  patent as many  genes as rapidly as
possible, the Company continues to face substantial competition in these efforts
both from entities using high  throughput  gene sequencers to discover genes, as
well as from entities using more  traditional  methods to discover genes related
to particular  diseases.  Research to identify genes is also being  conducted by
various institutes and United States and foreign  government-financed  entities,
including  British,  French,  German and Japanese  efforts,  as well as numerous
smaller  laboratories  associated  with  universities  or  other  not-for-profit
entities.  In addition,  a number of pharmaceutical and biotechnology  companies
and government-financed  programs are engaged or have announced the intention to
engage in areas of human  genome  research  similar to or  competitive  with the
Company's focus on gene  discovery,  and other companies are likely to enter the
field.

     The gene sequencing machines used by the Company are commercially available
and are  currently  being  utilized by many other  companies,  in some cases for
business purposes  competitive with those of the Company. In addition,  a number
of other  companies have  announced  plans to engage in gene discovery and could
acquire  similar  machines and develop  procedures  for automated  sequencing of
genes.  Although the Company believes that its large scale,  automated processes
and  lead  time  provide  it with a  competitive  advantage,  any  one of  these
companies or other entities may discover and establish a patent  position in one
or more genes that the  Company  has  identified  and might have  designated  or
considered  designating as a product candidate.  Any potential products based on
genes  identified  by the  Company  will face  competition  both from  companies
developing  gene-based  products and from  companies  developing  other forms of
treatment for diseases that may be caused by, or related to, genes identified by
the Company.

     The   Company's   potential   competitors   include    pharmaceutical   and
biotechnology  firms and other  companies,  not-for-profit  entities  and United
States   and   foreign   government-financed   programs,   many  of  which  have
substantially   greater  research  and  product  development   capabilities  and
financial,  scientific,  marketing and human  resources than the Company.  These
competitors may succeed in identifying genes or developing products earlier than
the Company or its  collaborators,  obtaining  approvals  from the United States
Food and Drug  Administration  (the "FDA") or other regulatory agencies for such
products  more  rapidly  than the Company or its  collaborators,  or  developing
products  that are more  effective  than those  proposed to be  developed by the
Company  or its  collaborators.  Certain  of these  competitors  may be  further
advanced than the Company in developing potential products that may compete with
potential  products of the Company.  There can be no assurance that research and
development  by others  will not render  the  products  that the  Company or its
collaborators  may  seek to  develop  obsolete  or  uneconomical  or  result  in
treatments, cures or diagnostics superior to any therapy or diagnostic developed
by the Company or its collaborators, or that any therapy or diagnostic developed
by the Company or its  collaborators  will be preferred to any existing or newly
developed technologies.  The Company expects that competition in this field will
intensify.

GOVERNMENT REGULATION


     Regulation of Pharmaceutical  Products. New drugs are subject to regulation
under the Federal Food,  Drug,  and Cosmetic Act, and  biological  products,  in
addition to being subject to certain provisions of that Act, are regulated under
the Public  Health  Service Act. The Company  believes  that the  pharmaceutical
products  developed  by it or its  collaborators  will be  regulated  either  as
biological  products  or  as  new  drugs.  Both  statutes  and  the  regulations
promulgated  thereunder govern, among other things, the testing,  manufacturing,
distribution,  safety, efficacy,  labeling, storage, record keeping, advertising
and other promotional  practices  involving  biologics or new drugs, as the case
may be. FDA  approval  or other  clearances  must be  obtained  before  clinical
testing, and before manufacturing and marketing,  of biologics and drugs. At the
FDA, the Center for Biological  Evaluation and Research  ("CBER") is responsible
for the regulation of biologics, and the Center for Drug Evaluation and Research
("CDER") is responsible for the regulation of new drugs.



<PAGE>





     In addition,  any gene therapy products (which is one of the areas in which
the  Company  may  develop  products)  developed  by the  Company  will  require
regulatory  approvals  prior  to  clinical  trials  and  additional   regulatory
approvals  prior to  commercialization.  New human  gene  therapy  products  are
expected  to be  subject  to  extensive  regulation  by the FDA  and  comparable
agencies in other countries.  The precise regulatory requirements with which the
Company will have to comply are uncertain at this time due to the novelty of the
human gene therapies  currently under development.  Currently,  each protocol is
reviewed by the FDA and, in some  instances,  the NIH, on a case-by-case  basis.
The FDA and the NIH have published a "Points to Consider" guidance document with
respect to the development of gene therapy protocols.

     Obtaining FDA approval has  historically  been a costly and time  consuming
process.  Generally, in order to gain FDA pre-market approval, a developer first
must conduct  preclinical  studies in the laboratory and in animal model systems
to gain  preliminary  information  on an agent's  efficacy  and to identify  any
safety  problems.  The results of these  studies are  submitted  as a part of an
investigational new drug ("IND")  application,  which the FDA must review before
human clinical trials of an investigational  drug can start. The IND application
includes a detailed  description  of the initial  clinical  investigation  to be
undertaken.

     Preclinical  studies can take several  years to  complete,  and there is no
assurance that an IND based on such studies will ever become  effective so as to
permit  clinical  testing to begin. A 30-day waiting period after the receipt of
each IND is required by the FDA prior to the  commencement  of initial  clinical
testing,  unless  the FDA  approves  the  IND  before  then.  If the FDA has not
commented on or questioned the IND within this 30-day period,  initial  clinical
studies may begin,  although  companies  often obtain  affirmative  FDA approval
before beginning such studies.  If the FDA has comments or questions,  it places
the  studies  on  clinical  hold  and  the  questions  must be  answered  to the
satisfaction of the FDA before the initial clinical testing may begin.

     In order to  commercialize  pharmaceutical  products,  the  Company  or its
collaborator must sponsor and file an IND and will be responsible for initiating
and overseeing the clinical  studies to demonstrate the safety and efficacy and,
for a biologic product, the potency that are necessary to obtain FDA approval of
any such products.  For Company or  collaborator-sponsored  INDs, the Company or
its  collaborator  will be required to select qualified  investigators  (usually
physicians within medical  institutions) to supervise the  administration of the
products,  and ensure that the  investigations  are  conducted  and monitored in
accordance  with  FDA  regulations  and the  general  investigational  plan  and
protocols  contained  in the IND.  Clinical  trials are  normally  done in three
phases,  although the phases may overlap. Phase I trials are concerned primarily
with the safety and preliminary  effectiveness  of the drug,  involve fewer than
100  subjects,  and may take  from six  months  to over a year.  Phase II trials
normally  involve  a  few  hundred  patients  and  are  designed   primarily  to
demonstrate effectiveness in treating or diagnosing the disease or condition for
which the drug is intended, although short-term side effects and risks in people
whose  health is impaired  may also be  examined.  Phase III trials are expanded
clinical trials with larger numbers of patients which are intended to gather the
additional   information  for  proper  dosage  and  labeling  of  the  drug  and
demonstrate its safety and effectiveness.  Clinical trials generally take two to
five years, but may take longer, to complete.  Recent regulations promulgated by
the FDA may shorten the time periods and reduce the number of patients  required
to be  tested  in the  case of  certain  life-threatening  diseases  which  lack
available alternative treatments.

     The FDA receives reports on the progress of each phase of clinical testing,
and it may require the  modification,  suspension,  or  termination  of clinical
trials if an  unwarranted  risk is presented  to patients.  If the FDA imposes a
clinical  hold,   clinical   trials  may  not   recommence   without  prior  FDA
authorization  and then only under terms  authorized by the FDA. The IND process
can thus result in substantial  delay and expense.  Human gene therapy  products
(which is one of the areas in which the  Company  may seek to develop  products)
are a new  category of  therapeutics,  and there can be no  assurance  as to the
length of the clinical trial period, the number of patients the FDA will require
to be enrolled in the clinical trials in order to establish the safety, efficacy
and, in the case of a biologic,  potency of human gene therapy products, or that
the clinical  data  generated in these  studies will be acceptable to the FDA to
support marketing approval.

     After completion of clinical trials of a new drug or biologic product,  FDA
marketing approval must be obtained.  If the product is regulated as a biologic,
CBER  will  require  the  submission  and  approval,  depending  on the  type of
biologic,  of either a Biologic  License  Application or both a Product  License
Application and an Establishment License Application before commercial marketing
of the biologic.  If the product is  classified as a new drug,  the Company must
file a New Drug Application ("NDA") with CDER and receive approval before



<PAGE>



commercial  marketing of the drug  (collectively  these forms of application are
referred to below as the "BLA").  The NDA or BLA must include results of product
development,  preclinical  studies and clinical trials. The testing and approval
processes require substantial time and effort and there can be no assurance that
the FDA will  accept  the NDA or BLA for  filing  and,  even if filed,  that any
approval will be granted on a timely basis,  if at all. NDAs and BLAs  submitted
to the FDA can take,  on  average,  two to five  years to receive  approval.  If
questions arise during the FDA review process,  approval can take more than five
years.  Notwithstanding  the submission of relevant data, the FDA may ultimately
decide that the NDA or BLA does not satisfy its regulatory criteria for approval
and require additional  clinical studies.  Even if FDA regulatory  approvals are
obtained, a marketed product is subject to continual review, and later discovery
of  previously  unknown  problems  or  failure  to  comply  with the  applicable
regulatory requirements may result in restrictions on the marketing of a product
or  withdrawal  of the  product  from the  market as well as  possible  civil or
criminal sanctions. In addition, the FDA may condition marketing approval on the
conduct  of  specific  post-marketing  studies to  further  evaluate  safety and
effectiveness.

     If a developer  obtains  designation by the FDA of a biologic or drug as an
"orphan" drug for a particular  use, the developer may request small grants from
the federal government to help defray the costs of qualified testing expenses in
connection  with the  development of such drug.  Orphan drug  designation may be
granted  to drugs for rare  diseases  (generally,  a disease or  condition  that
affects  populations of fewer than 200,000  individuals  in the United  States),
including  many  genetic   diseases.   The  first  applicant  who  has  obtained
designation  of a drug for a  particular  use as an orphan drug and then obtains
approval  of a marketing  application  for such drug for the  particular  use is
entitled  to  marketing  exclusivity  for a period of seven  years,  subject  to
certain  limitations.  Essentially,  this means that no other company can market
the same orphan  drug for the use  approved by the FDA for seven years after the
approval.

     Orphan drug  designation  does not convey any  advantage in, or shorten the
duration of, the regulatory approval process. Although obtaining FDA approval to
market a product with an orphan drug designation can be advantageous,  there can
be no  assurance  that  the  scope  of  protection  or the  level  of  marketing
exclusivity that is currently  afforded by orphan drug designation and marketing
approval will remain in effect in the future.

     Rigorous and extensive FDA regulation of pharmaceutical  products continues
after approval,  particularly with respect to manufacturing,  which must be done
in  compliance  with  cGMP,  reporting  of  adverse  effects,  and  advertising,
promotion, and marketing.

     Regulation of Diagnostics. Some of the diagnostic products developed by the
Company or its  collaborators  are likely to be  regulated by the FDA as medical
devices rather than drugs. The nature of the FDA requirements applicable to such
diagnostic  devices  depends on their  classification  by the FDA. A  diagnostic
device  developed  by the Company or its  collaborators  would be  automatically
classified as a Class III device, requiring premarket approval, and would remain
in Class III and require premarket  approval unless the device were reclassified
into Class II or Class I by the FDA or the sponsor could demonstrate to the FDA,
in  the  required  pre-market  notification  procedure,   that  the  device  was
substantially  equivalent to a legally  marketed  existing  device that has been
classified in Class I or Class II or to a legally  marketed Class III device for
which premarket  approval is not required.  Following  submission of a premarket
notification,  a company  may not market the  device for  clinical  use until an
order is issued by the FDA  finding the device to be  substantially  equivalent.
The FDA has no  specific  time  limit by which it must  respond  to a  premarket
notification.  If the Company or its  collaborators  were unable to  demonstrate
such substantial equivalence to the FDA's satisfaction,  it would be required to
undertake  the costly and  time-consuming  process,  comparable  to that for new
drugs, of conducting preclinical studies and conducting clinical tests, filing a
pre-market approval ("PMA") application, and obtaining FDA approval.

     If the Company or its collaborators can demonstrate substantial equivalence
to a Class I product, the "general controls" of the Food, Drug, and Cosmetic Act
- --  chiefly  adulteration,   misbranding,   and  "good  manufacturing  practice"
requirements -- will apply. If substantial  equivalence to a Class II device can
be shown,  the general  controls plus "special  controls" -- such as performance
standards,  guidelines for safety and effective, and post-market surveillance --
will  apply.  If  substantial  equivalence  to a Class  III  device  (for  which
premarket  approval is not required) can be shown, the general controls plus any
applicable  special controls will apply, and the product will require  premarket
approval once the FDA requires such approval for the device to which substantial
equivalence  was  shown  and  other  devices  of the same  generic  type.  While
demonstrating  substantial  equivalence  to a Class I,  Class  II or  Class  III
product (for which  premarket  approval is not  required) is not  ordinarily  as
costly or time-



<PAGE>



consuming as the  premarket  approval  process for Class III devices,  it can in
some  cases also  involve  conducting  clinical  tests to  demonstrate  that any
differences  between  the new  device and  devices  already on the market do not
affect safety or effectiveness.

     In January 1997, the NIH-Department of energy Task Force on Genetic Testing
issues  proposed  recommendations  including  increased  monitoring  of  genetic
disorders,  and tracking of people with positive and negative  test results,  by
CDC;  establishment  (under the Clinical  Laboratory  Improvement  Amendments of
1988) of  national  program for the  accreditation  of  laboratories  performing
genetic testing,  based on quality assurance,  proficiency  testing, and on-site
inspections;  and  additional  regulation by the FDA. The Task Force's  proposed
recommendations,  if  adopted  and  implemented,  would  significantly  increase
federal  regulation of genetic tests,  whether provided as a product or service,
beginning with their manufacture and continuing through their marketing and use.

     Marketed  devices  are  subject  to  pervasive  and  continuing  regulatory
oversight by the FDA,  including  record-keeping  requirements  and reporting of
adverse  experiences  with the use of the  device.  The Federal  Food,  Drug and
Cosmetic Act requires that medical  devices be  manufactured  in accordance with
the FDA's cGMP regulation.  This regulation  requires,  among other things, that
(i) the manufacturing process be regulated, controlled and documented by the use
of written  procedures,  and (ii) the ability to produce  devices which meet the
manufacturer's  specifications be validated by extensive and detailed testing of
every aspect of the process.  The regulation also requires  investigation of any
deficiencies  in the  manufacturing  process  or in the  products  produced  and
detailed record keeping.  Manufacturing facilities are subject to FDA inspection
on a periodic basis to monitor  compliance with GMP requirements.  If violations
of the applicable  regulations are noted during FDA inspections of manufacturing
facilities, the FDA can prohibit further manufacturing, distribution and sale of
the  devices  until the  violations  are cured.  On  October  7,  1996,  the FDA
published  a revision  of its GMP  requirements,  incorporating  them into a new
regulation  called the  quality  system  ("QS")  regulation.  The QS  regulation
requires,  among  other  things,   pre-production  design  controls,  purchasing
controls,  and  maintenance of service  records.  The QS regulation is effective
June 1, 1997,  except that the FDA has stated that as long as manufacturers  are
taking  reasonable  steps  to come  into  compliance  with  the  design  control
requirements,  the FDA will not initiate action  (including  enforcement  cases)
based on a failure to comply with these  requirements  before June 1, 1998. Once
in effect,  the QS regulation is expected to increase the cost of complying with
the cGMP requirements and related  requirements.  Other applicable  requirements
include the FDA's medical  device  (manufacturer)  reporting  regulation,  which
requires that the device  manufacturer  provide information to the FDA on deaths
or serious injuries alleged to have been associated with the use of its marketed
devices,  as well as product  malfunctions that would likely cause or contribute
to a death or serious injury if the malfunction were to recur.

     Labeling,  advertising and promotional  activities for  investigational and
marketed  devices are subject to scrutiny by the FDA and, in certain  instances,
by the Federal Trade Commission. The FDA enforces statutory prohibitions against
promoting or marketing products for unapproved uses.

     Other. In addition to the foregoing,  the Company's business is and will be
subject to  regulation  under  various  state and  federal  environmental  laws,
including the Occupational Safety and Health Act, the Resource  Conservation and
Recovery Act and the Toxic  Substances  Control Act. These and other laws govern
the Company's  use,  handling and disposal of various  biological,  chemical and
radioactive  substances  used in and wastes  generated  by its  operations.  The
Company believes that it is in material compliance with applicable environmental
laws  and that  its  continued  compliance  therewith  will not have a  material
adverse effect on its business. The Company cannot predict, however, whether new
regulatory   restrictions   on  the   production,   handling  and  marketing  of
biotechnology  products  will be  imposed  by state or  federal  regulators  and
agencies.


SOURCES OF SUPPLY


     The Company currently relies on a single supplier,  Applied  Biosystems,  a
division of  Perkin-Elmer  Corporation,  to provide  all of its gene  sequencing
machines and certain  reagents  required in connection  with the gene sequencing
process.  The Company has not  experienced  problems  in  obtaining  either gene
sequencing machines or reagents in a timely manner.  While other gene sequencing
machines are  available,  the Company does not believe that such other  machines
are as efficient as the machines currently used by the Company. The Company



<PAGE>



has entered into  certain  agreements  with  Perkin-Elmer  Corporation  that (i)
provide for an  established  pricing  structure  with  respect to the  Company's
purchases of selected  reagents,  although  such pricing is subject to change if
the Company does not meet certain minimum purchase requirements, and (ii) in the
case of one enzyme,  provide  that the Company will  purchase  and  Perkin-Elmer
Corporation  will sell a stated  quantity at a fixed price.  The Company  orders
these  reagents  by  submitting  purchase  orders  at the time of  purchase.  No
assurance can be given that either the gene sequencing  machines or the reagents
will  remain   available  in  commercial   quantities  at  costs  that  are  not
economically  prohibitive.  Should the  Company  be unable to obtain  additional
machines or an adequate supply of reagents or other  ingredients at commercially
reasonable  rates,  its  ability to  continue to  identify  genes  through  gene
sequencing  in  accordance  with its current  business  plan would be  adversely
affected.

     The Company has contracted for the manufacture of therapeutic  proteins for
preclinical  testing  and  clinical  development  from a  single  supplier.  The
supplier is a recently  organized  entity which will manufacture the therapeutic
proteins in a new cGMP manufacturing  facility. The Company will be dependent on
this  company for its supply of  therapeutic  proteins.  Any failure or delay in
supplying  therapeutic proteins could affect the timing of preclinical tests and
clinical trials and could delay submission of products for regulatory approval.

MANUFACTURING AND MARKETING


     The Company has developed  in-house  capabilities  for the  production  and
purification  of recombinant  proteins for use in its research  activities,  but
does not  currently  have any  manufacturing  facilities  capable  of  supplying
materials suitable for clinical trials or for commercial sale or any experiences
in manufacturing  materials suitable for clinical trials or for commercial sale.
In the near term, the Company intends to rely on third parties for production of
certain of its therapeutic  proteins for use in pre-clinical  and early clinical
development  and has entered into an agreement with a third party to supply such
materials.  The Company  will depend on such third party to comply with  current
good manufacturing  practices ("cGMPs") and other regulatory requirements and to
deliver materials on a timely basis, however there can be no assurance that such
party will  perform.  Any  failures by third  parties may delay  clinical  trial
development or the submission of products for regulatory approval,  or otherwise
impair the Company's competitive position, which could have a materially adverse
effect on the Company's business.

     The Company is planning the  construction  of a pilot scale  production and
process development facility for the preparation of clinical trial quantities of
its therapeutic  proteins in compliance with cGMP requirements.  The Company has
completed the  conceptual  design and is beginning the  preliminary  engineering
design and site selection process. Construction is expected to begin by mid 1997
and be completed in mid to late 1998. The facility will be designed to allow for
the production and purification of multiple  recombinant  proteins.  The Company
intends to use the facility for production of preclinical and clinical  supplies
of its therapeutic proteins and for process development and scale-up. A delay in
completion  of the  facility  could  adversely  affect  the cost and  timing  of
clinical trials and could delay submission of products for regulatory  approval.
The Company  intends to seek  financing  with respect to all or a portion of the
estimated  $40  million  construction  cost  of  this  proposed  facility.   See
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations -- Liquidity."

     The Company's long range plan is to establish manufacturing capabilities to
allow it to meet its clinical trial and commercial  manufacturing  requirements.
However,  the Company may contract with third party manufacturers or may develop
products  with  partners  and  take  advantage  of the  partner's  manufacturing
capabilities.  There  can be no  assurance  that  the  Company  will  be able to
successfully establish  manufacturing  capabilities and manufacture its products
economically or in compliance with cGMPs and other regulatory requirements.

     The  Company  generally  expects to rely on its  collaborators  or on third
parties  with whom the Company may  contract to market any  products.  In either
case,  the  Company  will be  dependent  on such third  parties  for  marketing.
However,  in the future,  the Company may  co-promote  or retain U.S.  marketing
rights to certain  of its  products.  Significant  additional  expenditures  and
management  resources  will be required  to develop an external  sales force and
implement  its  marketing  strategy  if the Company  decides to market  products
directly.  There can be no assurance that the Company's  collaborators  or other
third parties will be successful in marketing products, or that the Company will
be able to establish a successful marketing force.



<PAGE>







EMPLOYEES


     As of February 15, 1997, the Company had 284 full-time  employees,  of whom
244 were in research and development,  including 61 scientists holding doctorate
degrees.  The Company anticipates hiring  approximately 25 additional  employees
during the next twelve months.  The  additional  staff are expected to include a
formulation and stability staff and a clinical  development  group in support of
product  development  research.  None of the  Company's  employees is covered by
collective bargaining agreements and management considers its relations with its
employees to be good.



ITEM 2.  PROPERTIES



     The  Company  currently  leases   approximately   135,000  square  feet  of
laboratory  and office space in five  buildings  in  Rockville,  Maryland.  This
includes approximately 119,000 square feet of laboratory space and approximately
16,000 square feet of administrative office space.

     The Company  considers that its properties are generally in good condition,
are well  maintained  and are  generally  suitable  and adequate to carry on the
Company's business.


ITEM 3.  LEGAL PROCEEDINGS


     The Company is not party to any material legal proceedings.


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


     None.



<PAGE>





                                     PART II

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

     The Company's  Common Stock is traded on the NASDAQ  National Market System
under the symbol HGSI.  The Company's  Common Stock began trading on December 2,
1993.  The following  table  presents the quarterly  high and low sales price as
quoted by NASDAQ.

                                    1996             HIGH              LOW

                           First Quarter             49 3/4            31 1/2

                           Second Quarter            48 1/4            32 1/2

                           Third Quarter             39 1/2            24 3/4

                           Fourth Quarter            43 1/4            34 3/4

                                    1995             HIGH              LOW

                           First Quarter             15 1/2            12 1/4

                           Second Quarter            17 3/4            12 1/4

                           Third Quarter             29                16 5/8

                           Fourth Quarter            38 1/4            18 1/4

                                    1994             HIGH              LOW

                           First Quarter             20 3/4            14

                           Second Quarter            20 1/2            15 1/4

                           Third Quarter             19 3/4            14

                           Fourth Quarter            18 1/2            14 1/4

                                    1993             HIGH              LOW

                           12/2/93 - 12/31/93        27 3/4            14 1/2

As of March 17,  1997,  there were  approximately  525  holders of record of the
Company's  Common Stock. No cash dividends have been paid on the Common Stock to
date.



<PAGE>





ITEM 6.                             SELECTED FINANCIAL DATA

The  following  selected  financial  data of the  Company  for the  years  ended
December 31, 1994, 1995 and 1996, and as of December 31, 1995 and 1996 have been
derived from the audited  financial  statements  included  elsewhere  herein and
should  be  read  in  conjunction   with  such  financial   statements  and  the
accompanying notes. The following selected financial data of the Company for the
period from June 26,  1992  (inception)  to  December  31, 1992 and for the year
ended  December 31, 1993,  and as of December 31, 1992,  1993 and 1994 have been
derived from audited  financial  statements not included herein.  The results of
operation of prior periods are not necessarily indicative of results that may be
expected for any other period. See "ITEM 7. MANAGEMENTS  DISCUSSION AND ANALYSIS
OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS" and "ITEM 1. BUSINESS."
<TABLE>
<CAPTION>

                             JUNE 26, 1992
                              (INCEPTION)             YEARS ENDED DECEMBER 31,
                            TO DECEMBER 31,  -------------------------------------------------
                                 1992        1993        1994            1995         1996
                               --------    --------    ----------     ----------    ----------
                                            (IN THOUSANDS, EXCEPT PER SHARE DATA)
STATEMENT OF OPERATIONS
DATA:
<S>                            <C>         <C>         <C>            <C>            <C>     
Revenue-research and development
 collaborative contracts ...   $     --    $ 22,000    $ 41,065       $  5,000       $ 36,460
Costs and expenses:
  Research and development:
     Direct expenditures ...        805       7,611      17,636         22,904         30,409
     Payments under research
       services agreement ..      2,925       8,989       9,662         10,075         10,063
  General and administrative        541       3,998       6,840          8,745          9,639
Net interest (income)
    expense ................        121        (390)     (2,813)        (4,005)        (6,092)
                               --------    --------    ----------     -------- --    ----------
Income (loss) before taxes .     (4,392)      1,792       9,740        (32,719)        (7,559)
Provision (benefit) for
income taxes ...............                     --          (2)         2,436         (1,651)
                                                                                          208
Net income (loss) ..........   $ (4,392)   $  1,794    $  7,304       $(31,068)      $ (7,767)
                               ========    ========    ==========     ==========    ==========
Net income (loss) per share    $  (0.41)   $   0.15    $   0.47(1)    $  (1.98)(1)   $  (0.42)(1)
                               ========    ========    ==========     ==========    ==========
Weighted average shares
 outstanding ...............     10,783      12,197      15,543(1)      15,723(1)      18,631(1)
</TABLE>
<TABLE>
<CAPTION>

                                                                     AS OF DECEMBER 31,
                                                 -----------------------------------------------------------
                                                   1992        1993         1994         1995         1996
                                                 --------     -------      -------     ---------    ---------
                                                                        (In thousands)
<S>                                              <C>          <C>          <C>         <C>          <C>      
                BALANCE SHEET DATA:
                Cash, cash equivalents and
                 investments...................  $  2,898     $69,478      $76,002     $ 105,462    $ 116,116
                Total assets...................     9,835      82,450       95,543       126,963      140,117
                Total debt and capital
                 leases, less current portions.        64       1,338        5,346         4,332        2,954
                Retained earnings (deficit)....    (4,392)     (2,598)       4,706       (26,362)     (34,129)
                Total stockholders' equity.....        68      75,929       83,785       115,606      128,521

- -------------------------------------------------------------------------------------------------------------------
</TABLE>

(1)      Computed  on the  basis  described  in  Note B of  Notes  to  Financial
         Statements.

     The Company has never paid dividends on its Common Stock.




<PAGE>







ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL

                       CONDITION AND RESULTS OF OPERATIONS
OVERVIEW


     The Company  initially  focused its efforts on  establishing  collaborative
arrangements,  establishing and expanding its gene  sequencing,  bioinformatics,
molecular   biology,   cell  biology,   protein   expression  and   pharmacology
capabilities, developing proprietary processes for automating the gene discovery
process and creating,  together with its  collaborators,  approximately 600 cDNA
libraries  representing most human organs, tissues and cell types. The Company's
activities  are focused  primarily on research and  development  of  therapeutic
protein product candidates.

     The Company has not received any product  sales  revenue or royalties  from
product  sales  and does not  anticipate  revenues  from  product  sales or from
royalties on product sales in the foreseeable future. Through December 31, 1996,
the  Company had  received  (i) $69.9  million in revenue  and $55.1  million in
equity payments pursuant to the SB Collaboration Agreements,  (ii) payments from
the New Collaboration  Partners of $17.5 million and (iii) an aggregate of $14.6
million from other  collaborators,  including $8.0 million from Pioneer  Hi-Bred
International,   Inc.  ("Pioneer"),  $2.0  million  from  F.  Hoffmann-La  Roche
("Roche"),  $3.0 million from  Pharmacia & Upjohn  Company  ("Pharmacia"),  $0.6
million  from  OraVax  Merieux  Co. and  Merieux  OraVax  S.N.C.  (collectively,
"OraVax") and $1.0 million from Schering-Plough (in addition to certain payments
received  from  Schering-Plough   pursuant  to  the  New  Collaboration  Partner
Agreements). Pursuant to the terms of such collaboration agreements, the Company
expects to receive license fees and research  payments of $17.5 million annually
over the next four years from the New Collaboration Partners and an aggregate of
$19.5 million over the next four years from other  collaborators.  See "Business
- -- Collaborative Arrangements."

     The Company  expects that its revenue sources for at least the next several
years may be  limited  to  interest  income,  payments  under the  collaboration
agreements with the New Collaboration Partners, payments from the sale of rights
and other  payments from other  collaborators  and licensees  under  existing or
future arrangements, to the extent that the Company enters into any such further
arrangements.  The Company  expects to continue  to incur  substantial  expenses
relating to its research and development efforts, which are expected to increase
relative to historical levels as the Company focuses on preclinical and clinical
trials required for the development of therapeutic  protein product  candidates.
As a result,  the Company expects to incur continued and increasing  losses over
the next several years unless it is able to realize  additional  revenues  under
existing  or new  collaboration  agreements.  The  timing  and  amounts  of such
revenues,  if any, cannot be predicted with certainty and will likely  fluctuate
sharply. Results of operations for any period may be unrelated to the results of
operations for any other period. In addition,  historical  results should not be
viewed as indicative of future operating results.

RESULTS OF OPERATIONS


YEARS ENDED DECEMBER 31, 1996 AND 1995
     Revenues.  The Company had  revenues of $36.5  million and $5.0 million for
the years ended December 31, 1996 and December 31, 1995, respectively.  The 1996
revenue  consisted of $6.9 million for the  achievement  of the third  milestone
("Milestone  III")  under the SB  Collaboration  Agreements,  $10.0  million  in
license fees and research  payments from  collaborations  with Pioneer and Roche
entered into in the first quarter of 1996,  $12.0 million in annual license fees
and additional payments from collaborations with  Schering-Plough and Synthelabo
entered into in the second quarter of 1996,  $5.5 million in annual license fees
and additional payments pursuant to a collaboration  agreement entered into with
Merck in July 1996,  and $2.1 million in license fees from  collaborations  with
Pharmacia,  MedImmune and OraVax entered into in the fourth quarter of 1996. The
1995  revenue  consisted  of $5.0  million from Takeda for an option and license
agreement to commercialize certain future products of the Company in Japan.

     Expenses.  Research and development expenses increased to $40.5 million for
the year ended  December 31, 1996 from $33.0 million for the year ended December
31, 1995. The increase  resulted  primarily from  significant  expansions in the
Company's cell biology,  protein  expression and  pharmacology  departments  and
reflect the



<PAGE>



Company's  increasing  emphasis on  determining  the  biological  functions  and
possible medical  utilities of genes and proteins  discovered as a result of the
Company's gene discovery efforts.  Expenses will continue to increase in support
of research and development of potential  products by the Company and in support
of the new collaborations.

     General and administrative  expenses increased to $9.6 million for the year
ended  December 31, 1996 from $8.7 million for the year ended December 31, 1995.
The  increase  resulted  primarily  from  significantly  higher  legal  expenses
associated  with filing and  prosecuting a larger number of patent  applications
relating to genes and proteins  discovered by the Company.  Patent expenses will
continue to increase  significantly  as  additional  applications  are filed and
existing  applications are prosecuted in the United States and  internationally.
Interest  income was  significantly  higher for the year ended December 31, 1996
compared to the year ended  December  31, 1995 due to higher cash  balances  and
interest rates.

     Net Income  (Loss).  The Company  recorded a net loss of $7.8  million,  or
$0.42 per share,  for the year ended December 31, 1996 compared to a net loss of
$31.1  million,  or $1.98 per share,  for the year ended  December 31, 1995. The
difference in results for the year ended December 31, 1996 and 1995 is primarily
due to the receipt of $36.5 million in license fees and research payments during
the year ended December 31, 1996, which was partially offset by higher expenses.



YEARS ENDED DECEMBER 31, 1995 AND DECEMBER 31, 1994

     Revenues. The Company generated $5.0 million in revenues for the year ended
December 31, 1995,  compared  with  revenues of $41.1 million for the year ended
December 31, 1994. The 1995 revenues were received from Takeda for an Option and
License  Agreement to  commercialize  certain future  products of the Company in
Japan. Substantially all of the 1994 revenues were payments upon the achievement
of the first milestone  ("Milestone I") (first quarter) and the second milestone
("Milestone II") (second quarter) under the SB Collaboration Agreements, and the
exercise by SB of an option for certain  rights in Southeast  Asia,  pursuant to
the SB Collaboration Agreements.

     Expenses. Research and development expenses were $33.0 million for the year
ended  December 31, 1995,  compared to $27.3 million for the year ended December
31, 1994. The Company's  payments to TIGR increased from $9.7 million in 1994 to
$10.1 million in 1995 due  primarily to higher  scheduled  research  payments in
accordance  with  the  long-term  contractual  agreement  between  TIGR  and the
Company.  Direct  expenditures  for research and development  increased to $22.9
million for the year ended  December  31,  1995 from $17.6  million for the year
ended  December  31, 1994 due to planned  expansions  in the areas of  molecular
biology, cell biology, protein expression and pharmacology.

     General and administrative  expenses increased to $8.7 million for the year
ended  December 31, 1995 from $6.8 million for the year ended  December 31, 1994
to support the increase in the Company's  activities.  Patent expenses increased
significantly as additional  applications  were filed and existing  applications
were  prosecuted in the United States and  internationally.  Interest income was
significantly  higher for the year ended  December 31, 1995 compared to the year
ended December 31, 1994 due to higher interest rates and cash balances.

     Net Income (Loss).  The Company  reported a net loss of $31.1  million,  or
$1.98 per share,  for the year ended December 31, 1995 compared to net income of
$7.3 million,  or $0.47 per share,  for the year ended  December 31, 1994.  This
difference is primarily due to the considerably  higher revenues recorded during
1994 compared to 1995 coupled with higher overall  expenses during 1995 compared
to 1994.

LIQUIDITY AND CAPITAL RESOURCES


     The Company had working capital plus long term  investments,  which include
obligations of the U.S.  government and  commercial  paper that have  maturities
greater  than 12 months  from the  balance  sheet  date,  of $110.8  million  at
December  31, 1996 as  compared to $101.0  million at  December  31,  1995.  The
increase  resulted from the sale of 339,065 shares of Common Stock to SmithKline
Beecham  for  $18.1  million  upon  completion  of  Milestone  III  under the SB
Collaboration  Agreements,  which was partially offset by the net loss generated
during the year, capital  expenditures,  and payments on capitalized  leases. In
addition, in March 1997 the company received



<PAGE>



net proceeds of $105 million after  underwriting  discounts and  commissions and
estimated offering expenses from a public offering of 3,000,000 shares of Common
Stock at a public offering price of $37.00 per share.

     The Company expects to continue to incur  substantial  expenses relating to
its research and  development  efforts,  which expenses are expected to increase
relative to historical levels as the Company focuses on preclinical and clinical
trials required for the development of therapeutic  protein product  candidates.
As of December  31, 1996,  the Company is  committed  to pay TIGR  approximately
$43.5 million during the next six years,  including  approximately $16.9 million
through  December 31, 1998.  At December 31, 1996,  the Company had  outstanding
commitments for  construction  and equipment  purchases  totaling  approximately
$700,000. In addition, the Company is planning the construction of a pilot scale
production and process  development  facility and intends to seek financing with
respect to all or a portion of the  estimated $40 million  construction  cost of
such facility. There can be no assurance that the Company will be able to obtain
any such financing on terms  acceptable to the Company,  or at all. In the event
that financing is not available on acceptable  terms,  the Company may determine
to use its own capital resources to finance all or a portion of the cost of such
facility.

     The Company expects that its existing funds,  (including  proceeds from the
offering in March 1997) interest income, and committed license fees and research
payments from the New  Collaboration  Partners and under existing  collaboration
agreements  will  be  sufficient  to  fund  the  Company's  operations  for  the
foreseeable  future. The Company's future capital  requirements and the adequacy
of its  available  funds  will  depend  on many  factors,  including  scientific
progress in its  research  and  development  programs,  the  magnitude  of those
programs,  the ability of the Company to establish  collaborative  and licensing
arrangements,  the cost involved in preparing, filing, prosecuting,  maintaining
and enforcing patent claims and competing technological and market developments.

     As of December 31, 1996, the Company had net operating  loss  carryforwards
for federal  income tax  purposes of  approximately  $30 million the majority of
which  expire,  if unused,  in the year 2011.  The  Company  also has  available
research and development tax credit carryforwards of approximately $4.8 million,
the majority of which will expire, if unused, between the years 2000 and 2010.

     The Company's funds are currently  invested in U.S. Treasury and government
agency  obligations,  investment-grade  commercial  paper  and  interest-bearing
securities.   Such  investment  reflects  the  Company's  policy  regarding  the
investment  of  liquid  assets,  which is to seek a  reasonable  rate of  return
consistent with the emphasis on safety, liquidity and preservation of capital.

SAFE HARBOR STATEMENT UNDER THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995


     Certain   statements   contained  in  "Item  1.   Business  "and  "Item  7.
Management's  Discussion  and  Analysis of  Financial  Condition  and Results of
Operations" , including statements  concerning future collaboration  agreements,
royalties  and  other  payments  under  collaboration  agreements,  and  product
development and sales and other  statements are forward looking  statements,  as
defined in the Private Securities  Litigation Reform Act of 1995. Actual results
may differ materially from those projected in the forward looking  statements as
a  result  of  risks  and  uncertainties,  including  but not  limited  to,  the
following:   the  scientific  progress  of  the  Company  in  its  research  and
development  programs;  the  magnitude  of these  programs;  the  ability of the
Company to establish additional  collaborative and licensing  arrangements;  the
extent to which the Company  engages in clinical  development of any products on
its own; the scope and results of pre-clinical  testing and clinical trials; the
time and costs involved in obtaining regulatory approvals; the costs involved in
preparing,  filing,  prosecuting,   maintaining  and  enforcing  patent  claims;
competing  technological  and market  developments;  and whether  conditions  to
milestone  payments are met and the timing of such payment,  and other risks and
uncertainties  detailed  elsewhere  herein  and  from to  time in the  Company's
filings with the Securities and Exchange Commision.


ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA


     The information  required by this item are set forth here in on pages F-1 -
F-19.



<PAGE>





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

           None.
          
                                    PART III


ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

     The Company  incorporates  herein by reference the  information  concerning
directors and executive officers in its Notice of Annual  Stockholder's  Meeting
and Proxy  Statement to be filed within 120 days after the end of the  Company's
fiscal year (the "1997 Proxy Statement").


ITEM 11. EXECUTIVE COMPENSATION


     The Company  incorporates  herein by reference the  information  concerning
executive compensation contained in the 1997 Proxy Statement.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT


     The Company  incorporates  herein by reference the  information  concerning
security ownership of certain beneficial owners and management  contained in the
1997 Proxy Statement.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS


     The Company  incorporates  herein by reference the  information  concerning
certain  relationships  and  related  transactions  contained  in the 1997 Proxy
Statement.



<PAGE>





                                     PART IV

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

(a)            The following documents are filed as part of this Annual Report:

(1)            Index to Financial Statements
<TABLE>
<CAPTION>

                                                                                Page
                                                                               Number
<S>                                                                           <C>
   Report of Ernst & Young LLP, Independent Auditors........................    F-2
 
   Report of Richard A. Eisner & Company, LLP, Independent Auditors.........    F-3

   Balance Sheets at December 31, 1995 and 1996.............................    F-4
 
   Statements of Operations for the years ended December 31, 1994, 1995 and    
    1996...................................................................     F-5
 
   Statements of Stockholders' Equity for the years ended December 31,
    1994, 1995 and 1996....................................................     F-6 
 
   Statements of Cash Flows for the years ended December 31, 1994, 1995 and     
    1996...................................................................     F-7
 
  Notes to Financial Statements............................................     F-8
</TABLE>

(2)       Financial Statement Schedules

         Financial   statement  schedules  are  omitted  because  they  are  not
required.

(3)         Exhibits
<TABLE>
<CAPTION>

Exhibit No.
<S>                <C>
 3.1*              Restated  Certificate of  Incorporation  (Fifth) of the Registrant  (Filed as Exhibit 3.1 to the
                   Registrant's  Form 10-K for the fiscal year ended December 31, 1993 and  incorporated  herein by
                   reference).
 3.2*              By-laws of the  Registrant  (Filed as Exhibit 3.2 to the  Registrant's  Form 10-K for the fiscal
                   year ended December 31, 1993 and incorporated herein by reference).
 4.1*              Form of Common Stock certificate
10.1*+             Collaboration  Agreement,  dated May 19, 1993,  between the  Registrant  and  SmithKline  Beecham
                   Corporation  ("SmithKline  Beecham"),  as amended on May 19,  1993 and August 19,  1993 (Filed as
                   Exhibit 10.1 to the Registrant's Form S-1 Registration Statement, as amended (Commission File No.
                   33-69850), originally filed October 1, 1993 and incorporated herein by reference).
10.2*              Second Amendment to HGS-SB Collaboration  Agreement,  effective  September 1,  1993, between the
                   Registrant and SmithKline  Beecham (Filed as exhibit 10.2 to the Registrant's  Form 10-K for the
                   fiscal year ended December 31, 1993 and incorporated herein by reference).
10.3*              Amendment to HGS-SB Collaboration Agreement, effective March 17, 1994, between the Registrant and
                   SmithKline Beecham (Filed as Exhibit 10.3 to the Registrant's Form 10-K for the fiscal year ended
                   December 31, 1993 and incorporated herein by reference).
10.4*+             License Agreement between the Registrant and SmithKline Beecham  Corporation dated September 15,
                   1994  (Filed  as  Exhibit  10.8 to the  Registrant's  Form  10-Q  filed  November 14,  1994  and
                   incorporated herein by reference).
10.5*+             Amendment to HGS-SB Collaboration  Agreement (Therapeutic Protein Amendment),  effective December
                   23,  1994,  between  the  Registrant  and  SmithKline  Beecham  (Filed  as  Exhibit  10.4  to the
                   Registrant's  Form 10- K for the fiscal year ended December 31, 1994 and  incorporated  herein by
                   reference).
<PAGE>

10.6*+             Amendment to HGS-SB Collaboration  Agreement (Milestone III Amendment),  effective  December 29,
                   1994,  between the Registrant and SmithKline  Beecham (Filed as Exhibit 10.5 to the Registrant's
                   Form 10-K for the fiscal year ended December 31, 1994 and incorporated herein by reference).
10.7*              Amendment to the Series B Convertible  Preferred Stock Purchase Agreement between the Registrant
                   and SmithKline  Beecham  Corporation,  dated  December 29,  1994. (Filed as Exhibit 10.96 to the
                   Registrant's  form S-3  Registration  Statement,  as  amended  (Commission  File  No.  33-96206)
                   originally filed August 25, 1995 and incorporated herein by reference).
10.8*+             Amendment to HGS-SB Collaboration Agreement, effective April 24, 1995, between the Registrant and
                   SmithKline Beecham Corporation.  (Filed as Exhibit 10.6 to the Registrant's form S-3 Registration
                   Statement,  as amended  (Commission  File No.  33-96206),  originally  filed  August 25, 1995 and
                   incorporated herein by reference).
10.9*+             Amendment to HGS-SB Collaboration Agreement,  effective May 31, 1995, between the Registrant and
                   SmithKline Beecham.  (Filed as Exhibit 10.1 to the Registrant's Form 10-Q filed August 14,  1995
                   and incorporated herein by reference).
10.10*+            Amendment  and  Restated  License  Agreement  between  the  Registrant  and  SmithKline  Beecham
                   effective  May 31,  1995 (Filed as Exhibit 10.1 to the  Registrant's  Form 10-Q filed August 14,
                   1995 and incorporated herein by reference).
10.11*+            Amendment to SmithKline  Beecham and Human Genome  Sciences,  Inc.  Collaboration  Agreement and
                   License  Agreement and Amended and Restated  License  Agreement  dated June 28, 1996.  (Filed as
                   exhibit  10.1 to the  Registrants  10-Q  filed  August  14,  1996  and  incorporated  herein  by
                   reference).
10.12*+            SmithKline  Beecham and Human Genome  Sciences,  Inc.  License  Agreement Dated June 28, 1996. (
                   Filed as exhibit 10.2 to the Registrants 10 -Q filed August 14, 1996 and incorporated  herein by
                   reference).
10.13*+            Therapeutic  Collaboration  and License  Agreement  by and among Human  Genome  Sciences,  Inc.,
                   Schering  Corporation,  Schering-Plough  Ltd., and SmithKline Beecham Corporation dated June 28,
                   1996. ( Filed as exhibit  10.3 to the  Registrants  10-Q filed August 14, 1996 and  incorporated
                   herein by reference).
10.14*+            Gene Therapy  Collaboration  and License  Agreement by and among Human  Genome  Sciences,  Inc.,
                   Schering  Corporation,  and Schering-Plough  Ltd., June 28, 1996. ( Filed as exhibit 10.4 to the
                   Registrants 10-Q filed August 14, 1996 and incorporated herein reference).
10.15*+            Collaboration and License Agreement by and among Human Genome Sciences,  Inc. SmithKline Beecham
                   Corporation and Synthelabo  dated June 30, 1996. ( Filed as exhibit 10.5 to the Registrants 10-Q
                   filed August 14, 1996 and incorporated herein by reference).
10.16*+            Collaboration  and License  Agreement  between  SmithKline  Beecham  Corporation,  Human  Genome
                   Sciences,  Inc.  and  Merck  KGaA  effective  July  10,  1996.  ( Filed as  exhibit  10.6 to the
                   Registrants 10-Q filed November 14, 1996 and incorporated herein by reference).
10.17*+            Research  Collaboration  Agreement  between the  Registrant  and  Genetic  Therapy,  Inc.  dated
                   September 13,  1994 (Filed as Exhibit 10.7 to the Registrant's Form 10-Q filed November 14, 1994
                   and incorporated herein by reference).
10.18*+            Option and License  Agreement  between the Company and Takeda  Chemical  Industries,  Ltd. dated
                   June 12,  1995 (Filed as Exhibit 10.3 to the Registrant's  Form 10-Q filed  August 14,  1995 and
                   incorporated herein by reference).
10.19*+            Collaboration and License  Agreement  between the Registrant and MedImmune,  Inc. dated July 27,
                   1995  (Filed  as  Exhibit  10.5  to  the  Registrant's  Form  10-Q  filed  August 14,  1995  and
                   incorporated herein by reference).
10.20*+            Research  Collaboration  Agreement,  dated  January 19,  1996,  between  Registrant  and Pioneer
                   Hi-Bred  International,  Inc. ("Pioneer").  (Field as Exhibit 10.15 to the Registrants Form 10-K
                   filed March 31,1996 and incorporated here in by reference).
10.21*+            License Agreement between Registrant and F. Hoffman-La Roche, Ltd. ("Roche").  (Filed as Exhibit
                   10.16 to the Registrants Form 10-K filed March 31,1996 and incorporated here in by reference).
10.22*+            Research Services Agreement,  dated October 1, 1992, between the Registrant and The Institute for
                   Genomic  Research  ("TIGR")  (Filed as Exhibit  10.4 to the  Registrant's  Form S-1  Registration
                   Statement,  as amended  (Commission  File No.  33-69850),  originally  filed  October 1, 1993 and
                   incorporated herein by reference).
10.23*+            Intellectual Property Agreement, dated October 2, 1992, between the Registrant and TIGR (Filed as
                   Exhibit 10.5 to the Registrant's Form S-1 Registration Statement, as amended (Commission File No.
                   33-69850), originally filed October 1, 1993 and incorporated herein by reference).
10.24*             Lease Funding  Agreement and Assignment,  dated March 2,  1993,  between the Registrant and TIGR
                   (Filed  as  Exhibit 10.6  to the  Registrant's  Form  S-1  Registration  Statement,  as  amended
                   (Commission File  No. 33-69850),  originally  filed October 1, 1993 and  incorporated  herein by
                   reference).
10.25*             Letter Agreement,  dated March 31,  1993, between the Registrant and TIGR (Filed as Exhibit 10.7
                   to the Registrant's Form S-1 Registration  Statement, as amended (Commission File No. 33-69850),
                   originally filed October 1, 1993 and incorporated herein by reference).
10.26*+            Letter Agreement,  dated April 19,  1993, between the Registrant and TIGR (Filed as Exhibit 10.8
                   to the Registrant's Form S-1 Registration  Statement, as amended (Commission File No. 33-69850),
                   originally filed October 1, 1993 and incorporated herein by reference).
10.27*             Stock  Purchase,  Restriction  and  Repurchase  Agreement,  dated  April 26,  1993,  between the
                   Registrant  and  TIGR  (Filed  as  Exhibit 10.47  to  the  Registrant's  Form  S-1  Registration
                   Statement,  as amended  (Commission  File  No. 33-69850),  originally  filed October 1, 1993 and
                   incorporated herein by reference).
10.28*             Letter Agreement,  dated May 7, 1993,  between the Registrant and TIGR (Filed as Exhibit 10.9 to
                   the Registrant's Form S-1 Registration  Statement,  as amended  (Commission File  No. 33-69850),
                   originally filed October 1, 1993 and incorporated herein by reference).
10.29*+            Human cDNA Database  Agreement among the Registrant,  SmithKline  Beecham  Corporation,  and The
                   Institute for Genomic  Research dated July 7,  1994 (Filed as Exhibit 10.5  to the  Registrant's
                   Form 10-Q filed November 14, 1994 and incorporated herein by reference).
10.30*+            Amendment to the Human cDNA Database  Agreement  between the Registrant  and SmithKline  Beecham
                   Corporation  and  the  Institute  for  Genomic  Research  dated   October 26,   1994  (Filed  as
                   Exhibit 10.6 to the Registrant's Form 10-Q filed  November 14,  1994 and incorporated  herein by
                   reference).
10.31*+            Second  Amendment to the Human cDNA Database  Agreement  between the  Registrant  and  SmithKline
                   Beecham  Corporation and the Institute for Genomic Research dated as of April 14, 1995. (Filed as
                   Exhibit  10.87 to the  Registrant's  Form 10-K for the fiscal  year ended  December  31, 1994 and
                   incorporated herein by reference).
10.32*             Common Stock Purchase Warrant,  dated June 8, 1993, granted to HCV III (Filed as Exhibit 10.33 to
                   the Registrant's  Form S-1 Registration  Statement,  as amended  (Commission File No.  33-69850),
                   originally filed October 1, 1993 and incorporated herein by reference).

<PAGE>

10.33*             Common Stock Purchase Warrant,  dated June 8, 1993, granted to HCV IV (Filed as Exhibit 10.34 to
                   the Registrant's  Form S-1 Registration  Statement,  as amended  (Commission File No. 33-69850),
                   originally filed October 1, 1993 and incorporated herein by reference).
10.34*             Common Stock Purchase Warrant,  dated June 8, 1993, granted to Everest (Filed as Exhibit 10.36 to
                   the Registrant's  Form S-1 Registration  Statement,  as amended  (Commission File No.  33-69850),
                   originally filed October 1, 1993 and incorporated herein by reference).
10.35*             Master Lease Agreement,  dated January 31, 1993, between the Registrant and MMC/GATX  Partnership
                   No. I (Filed as Exhibit 10.25 to the  Registrant's  Form S-1 Registration  Statement,  as amended
                   (Commission  File No.  33-69850),  originally  filed October 1, 1993 and  incorporated  herein by
                   reference).
10.36*             Warrant  Agreement,  dated  January 31,  1993,  between the Registrant and MMC/GATX  Partnership
                   No. I (Filed as Exhibit 10.26 to the Registrant's  Form S-1 Registration  Statement,  as amended
                   (Commission File No. 33- 69850),  originally filed  October 1,  1993 and incorporated  herein by
                   reference).
10.37*             Master  Lease  Agreement,  dated as of January 31,  1993,  between the  Registrant  and  Dominion
                   Ventures,  Inc. (Filed as Exhibit 10.27 to the Registrant's Form S-1 Registration  Statement,  as
                   amended (Commission File No. 33-69850),  originally filed October 1, 1993 and incorporated herein
                   by reference).
10.38*             Master Lease  Agreement,  dated  January 31,  1993,  between the Registrant  and Comdisco,  Inc.
                   (Filed as  Exhibit 10.29  to the  Registrant's  Form S- 1  Registration  Statement,  as  amended
                   (Commission File No.  33-69850),  originally filed  October 1,  1993 and incorporated  herein by
                   reference).
10.39*             Master Lease Agreement  (Equipment)  between the Registrant and Comdisco,  Inc.,  dated June 30,
                   1994  (Filed  as  Exhibit 10.12  to the  Registrant's  Form  10-Q  filed  August  12,  1994  and
                   incorporated herein by reference).
10.40*             Lease of Premises at 9620 Medical Center Drive,  Rockville,  Maryland (Filed as Exhibit 10.42 to
                   the Registrant's  Form S-1 Registration  Statement,  as amended  (Commission File No. 33-69850),
                   originally filed October 1, 1993 and incorporated herein by reference).
10.41*             Lease of Premises at 9430 Key West Avenue,  Rockville,  Maryland (Filed as  Exhibit 10.44 to the
                   Registrant's  Form S-1  Registration  Statement,  as  amended  (Commission  File No.  33-69850),
                   originally filed October 1, 1993 and incorporated herein by reference).
10.42*             Office Lease between the Registrant  and Key West IV Limited  Partnership,  dated June 14,  1994
                   (Filed as  Exhibit 10.11 to the  Registrant's  Form 10-Q filed August 12,  1994 and incorporated
                   herein by reference).
10.43*             Stock Purchase and Restriction  Agreement,  dated December 31,  1992, between the Registrant and
                   William A. Haseltine,  Ph.D.  (Filed as Exhibit 10.15 to the Registrant's  Form S-1 Registration
                   Statement,  as amended  (Commission File No.  33-69850),  originally  filed October 1,  1993 and
                   incorporated herein by reference).
10.44              Employment Agreement, dated February 25,1997, with William A. Haseltine, Ph.D.
10.45*             Restricted Stock Purchase  Agreement,  dated May 18, 1993,  between the Registrant and William A.
                   Haseltine,  Ph.D. (Filed as Exhibit 10.24 to the Registrant's Form S-1 Registration Statement, as
                   amended (Commission File No. 33-69850),  originally filed October 1, 1993 and incorporated herein
                   by reference).
10.46*             Promissory  Note,  dated March 4, 1994,  given by William A. Haseltine,  Ph.D. to the Registrant
                   (Filed as  Exhibit 10.58 to the  Registrant's  Form 10-K for the fiscal year ended  December 31,
                   1993 and incorporated herein by reference).

<PAGE>

10.47*             First Allonge to Promissory Note, dated December 16, 1994, given by William A. Haseltine,  Ph.D.
                   to the  Registrant  (Filed as Exhibit  10.65 to the  Registrant's  Form 10-K for the fiscal year
                   ended December 31, 1994 and incorporated herein by reference).
10.48*             Pledge  Agreement,  dated March 4,  1994,  between  William A.  Haseltine,  Ph.D. and Registrant
                   (Filed as  Exhibit 10.59 to the  Registrant's  Form 10-K for the fiscal year ended  December 31,
                   1993 and incorporated herein by reference).
10.49*             First  Amendment to Pledge  Agreement,  dated December 16, 1994,  between  William A. Haseltine,
                   Ph.D. and Registrant  (Filed as Exhibit 10.67 to the Registrant's  Form 10-K for the fiscal year
                   ended December 31, 1994 and incorporated herein by reference).
10.50*             Employment Agreement,  dated October 1992, with Craig A. Rosen, Ph.D. (Filed as Exhibit 10.17 to
                   the Registrant's  Form S-1 Registration  Statement,  as amended  (Commission File No. 33-69850),
                   originally filed October 1, 1993 and incorporated herein by reference).
10.51*             Restricted Stock Purchase  Agreement,  dated April 21, 1993,  between the Registrant and Craig A.
                   Rosen,  Ph.D.  (Filed as Exhibit 10.22 to the Registrant's  Form S-1 Registration  Statement,  as
                   amended (Commission File No. 33-69850),  originally filed October 1, 1993 and incorporated herein
                   by reference).
10.52*             Employment Agreement,  dated March 14, 1994, with Bradley G. Lorimier (Filed as Exhibit 10.22 to
                   the Registrant's Form 10-K for the Fiscal year ended December 31,  1993 and incorporated  herein
                   by reference).
10.53*             Promissory Note dated September 12,  1994, given by Bradley G. Lorimier to the Registrant (Filed
                   as Exhibit 10.9 to the Registrant's Form 10-Q filed  November 14,  1994 and incorporated  herein
                   by reference).
10.54*             Employment  Agreement,  dated January 23,  1995 with Robert H. Benson (Filed as Exhibit 10.27 to
                   the Registrant's From 10-K for the Fiscal year ended December 31,  1994 and incorporated  herein
                   by reference).
10.55*             Employment  Agreement  between the Company and  Melvin D.  Booth dated  June 19,  1995 (Filed as
                   Exhibit 10.4 to the  Registrant's  Form 10-Q filed August 14,  1995 and  incorporated  herein by
                   reference).
10.56*             Restricted Stock Purchase Agreement,  dated April 21, 1993, between the Registrant and Catherine
                   G. Blair  (Filed as  Exhibit 10.19  to the  Registrant's  Form S-1  Registration  Statement,  as
                   amended  (Commission  File No.  33-69850),  originally  filed  October 1, 1993 and  incorporated
                   herein by reference).
10.57*             Restricted Stock Purchase Agreement,  dated April 21, 1993, between the Registrant and James W.
                   Church (Filed as Exhibit 10.20 to the Registrant's Form S-1 Registration  Statement,  as amended
                   (Commission File No.  33-69850),  originally filed  October 1,  1993 and incorporated  herein by
                   reference).
10.58*             Restricted Stock Purchase Agreement,  dated April 21, 1993, between the Registrant and Donald D.
                   Johnston  (Filed as  Exhibit 10.21  to the  Registrant's  Form S-1  Registration  Statement,  as
                   amended  (Commission  File  No. 33-69850),  originally  filed  October 1,  1993 and incorporated
                   herein by reference).
10.59*             1993 Stock  Option  Plan  (Filed as  Exhibit 10.45  to the  Registrant's  Form S-1  Registration
                   Statement,  as amended  (Commission File No. 33- 69850),  originally  filed October 1,  1993 and
                   incorporated herein by reference).
10.60*             1994 Stock Option Plan (Filed as Exhibit 4 to the  Registrant's  Registration  Statement on Form
                   S-8, File No. 33-79020, filed May 17, 1994 and incorporated herein by reference).
10.61*             Form  of  Stock  Option  Agreement  (Filed  as  Exhibit  10.46  to  the  Registrant's  Form  S-1
                   Registration Statement,  as amended (Commission File No. 33-69850),  originally filed October 1,
                   1993 and incorporated herein by reference).
<PAGE>


10.62*             Agreements  between the Registrant and Perkin-Elmer  Corporation  (Filed as Exhibit 10.48 to the
                   Registrant's  Form S-1  Registration  Statement,  as  amended  (Commission  File No.  33-69850),
                   originally filed October 1, 1993 and incorporated herein by reference).
10.63*             $4,000,000  Maryland  Industrial  Development  Financing  Authority Taxable Variable Rate Demand
                   Economic  Development  Revenue  Bonds dated  December 21,  1994  (Filed as Exhibit  10.90 to the
                   Registrant's Form 10- K for the fiscal year ended December 31,  1994 and incorporated  herein by
                   reference).
23.1               Consents of Ernst & Young LLP, Independent Auditors
23.2               Consent of Richard A. Eisner & Company, LLP, Independent Auditors
27                 Financial Data Schedule
- -------------------------------------------------------------------------------------------------------------------
</TABLE>

     *    Incorporated by reference.

     +    Confidentiality treatment has been granted by the Commission. The copy
          filed  as  an   exhibit   omits  the   information   subject   to  the
          confidentiality request.



b)        Reports on Form 8-K

              The Company did not file any reports on Form 8-K during the fourth
quarter of 1996.




<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.




HUMAN GENOME SCIENCES, INC.


                                    BY:  /s/ William A. Haseltine, PH.D.
                                         --------------------------------------
                                            William A. Haseltine, Ph.D.
                                            Chairman and Chief Executive Officer



Dated:  March 31, 1997

     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 and the dates indicated:
<TABLE>
<CAPTION>

                   Signature                                         Title                                        Date
                   ---------                                         -----                                        ----
<S>                                              <C>                                                          <C>

/s/  William A. Haseltine, Ph.D.                 Chairman  of the Board  and  Chief  Executive                March 31, 1997  
- -----------------------------------              Officer (principal executive officer)  
William A. Haseltine, Ph.D.                                                   
                                                                                                                              
                                                 
/s/ Melvin D. Booth                              President, Chief Operating Officer                           March 31, 1997  
- -----------------------------------              Director                                            
Melvin D. Booth                                                                       
                                                                                                                              

/s/ Craig A. Rosen, Ph.D.                        Senior Vice President, Research and                          March 31, 1997  
- -----------------------------------              Development and Director                                                     
Craig A. Rosen, Ph.D.                                                                                
                                                                                                                              

/s/ Bradley G. Lorimier                          Senior Vice President, Business Development                  March 31, 1997  
- -----------------------------------              and Director     
Bradley G. Lorimier                                                                                         
                                                                                                                              

/s/ Steven C. Mayer                              Senior Vice President and                                    March 31, 1997  
- ----------------------------------               Chief Financial Officer
Steven C. Mayer                                  (Principal Financial and
                                                 Accounting Officer)
                                                                                                                              
/s/ Robert A. Armitage                           Director                                                     March 31, 1997  
- -----------------------------------                                                                            
Robert A. Armitage                                                                                                
                                                                                                                              
                                                                                                                              
                                                                                                                              
                                                                                                                              
<PAGE>                                                                                                                        
                                                                                                                              
                                                                                                                              
                                                                                                                              
                                                                                                                              
                                                       Director                                               March 31, 1997  
- -----------------------------------                                                                                         
Beverly Sills Greenough                                                                                                       
                                                                                                                              
                                                                                                                              
                                                       Director                                               March 31, 1997  
/S/ Donald D. Johnston                                                                                                        
- -----------------------------------                                                                                         
Donald D. Johnston                                                                                                            
                                                                                                                              
                                                       Director                                               March 31, 1997  
- -----------------------------------                                                                                         
Max Link, Ph. D.                                                                                                              
                                                                                                                              
                                                                                                                              
/S/ Joshua Ruch                                        Director                                               March 31, 1997  
- -----------------------------------                                                                                         
Joshua Ruch                                                                                                                   
                                                                                                                              
/s/ James Barnes Wyngaarden, M.D.                      Director                                               March 31, 1997  
- -----------------------------------                                                                                         
James Barnes Wyngaarden, M.D.                                                                                 


</TABLE>

<PAGE>
<TABLE>
<CAPTION>



                          INDEX TO FINANCIAL STATEMENTS

                                                                                         PAGE
                                                                                        NUMBERS
                                                                                        -------
<S>                                                                                      <C>
Report of Ernst & Young LLP, Independent Auditors .....................................   F-2
Report of Richard A. Eisner & Company, LLP, Independent Auditors ......................   F-3
Balance Sheets at December 31,1995 and 1996 ...........................................   F-4
Statements of Operations for years ended December 31, 1994 1995 and 1996 ..............   F-5
Statements of Stockholders' Equity for the years ended December 31, 1994, 1995 and 1996   F-6
Statements of Cash Flows for the years ended December 31, 1994, 1995 and 1996..........   F-7
Notes to Financial Statements .........................................................   F-8
</TABLE>






                                       F-1




<PAGE>



                REPORT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

Board of Directors and Stockholders
Human Genome Sciences, Inc.
Rockville, Maryland

         We have  audited  the  accompanying  balance  sheets  of  Human  Genome
Sciences,  Inc. as of December 31, 1995 and 1996 and the related  statements  of
operations, stockholders' equity, and cash flows for the years then ended. These
financial  statements are the  responsibility of the Company's  management.  Our
responsibility  is to express an opinion on these financial  statements based on
our audits. The financial statements of Human Genome Sciences, Inc. for the year
ended  December  31, 1994 were  audited by other  auditors  whose  report  dated
February 14,1995 expressed an unqualified opinion on those statements.

         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 Human  Genome
Sciences,  Inc. at December 31, 1995 and 1996 and the results of its  operations
and cash flows for the years then ended, in conformity  with generally  accepted
accounting principles.


                                                           /s/ Ernst & Young LLP

Vienna, Virginia
February 14,1997


                                       F-2

<PAGE>




        REPORT OF RICHARD A. EISNER & COMPANY, LLP, INDEPENDENT AUDITORS


Board of Directors and Stockholders
Human Genome Sciences, Inc.
Rockville, Maryland

         We  have   audited   the   accompanying   statements   of   operations,
stockholders' equity and cash flows of Human Genome Sciences,  Inc. for the year
ended December 31, 1994. These financial  statements are the  responsibility  of
the Company's  management.  Our responsibility is to express an opinion on these
financial statements based on our audit.

         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  enumerated  above  present
fairly,  in all material  respects,  the results of operations and cash flows of
Human Genome  Sciences,  Inc. for the year ended December 31, 1994 in conformity
with generally accepted accounting principles.


                                            /s/ Richard A. Eisner & Company, LLP

New York, New York
February 14, 1995







                                      F-3










<PAGE>

<TABLE>
<CAPTION>
                           HUMAN GENOME SCIENCES, INC.
                                 BALANCE SHEETS
                                                                                         December 31,
                                                                                      1995          1996
                                                                                 ------------- ---------
                                                                                   (dollars in thousands
                                                                                 except per share amounts)
<S>                                                                                <C>           <C>      
                         ASSETS
                         Current assets:
                           Cash and cash equivalents..........................     $  39,853     $  27,341
                           Short-term investments.............................        58,529        58,282
                           Prepaid expenses and other current assets..........         2,163         2,935
                                                                                   ---------     ---------
                                   Total current assets.......................       100,545        88,558
                         Long-term investments................................         7,080        30,493
                         Furniture and equipment (net of accumulated
                           depreciation and amortization).....................        16,005        18,031
                         Restricted investments...............................         2,000         1,705
                         Other assets.........................................         1,333         1,330
                                                                                   ---------     ---------
                                   TOTAL......................................    $  126,963    $  140,117
                                                                                 ============  ===========
                         LIABILITIES
                         Current liabilities:
                           Current portion of long-term debt..................     $     444     $     444
                           Accounts payable and accrued expenses..............         2,341         3,361
                           Accrued payroll and related taxes..................           692         1,120
                           Current obligation under capital leases............         1,174           811
                           Deferred income....................................         2,000         2,537
                                                                                   ---------     ---------
                                   Total current liabilities..................         6,651         8,273
                         Long-term debt, net of current portion...............         3,112         2,668
                         Obligations under capital leases, net of current
                           portion............................................         1,220           286
                         Other liabilities....................................           374           369
                                                                                   ---------     ---------
                                   TOTAL......................................        11,357        11,596
                         Commitments and other matters........................           --             --

                         STOCKHOLDERS' EQUITY
                         Common stock -- $.01 par value; shares
                           authorized -- 50,000,000; shares issued -- 18,231,931
                           and 18,784,382 at December 31, 1995 and 1996,
                           respectively.......................................          182           188
                                                                                    --------     ---------
                         Additional paid-in capital...........................       142,624       162,583
                         Unearned portion of compensatory stock and warrants..          (885)           --
                         Unrealized gain (loss) on investments available for
                           sale...............................................            47          (121)
                         Retained deficit.....................................       (26,362)      (34,129)
                                                                                   ---------     ---------
                                   Total stockholders' equity.................       115,606       128,521
                                                                                 -----------   -----------
                                   TOTAL......................................     $ 126,963    $  140,117
                                                                                   =========   ===========
</TABLE>

The accompanying notes to financial statements are an integral part hereof.

                                      F-4
<PAGE>



                           HUMAN GENOME SCIENCES, INC.
                            STATEMENTS OF OPERATIONS
<TABLE>
<CAPTION>

                                                                               Year Ended December 31,
                                                                        1994            1995           1996
                                                                   --------------  -------------- ---------
                                                                          (dollars in thousands, except
                                                                                per share amounts)
<S>                                                                 <C>              <C>           <C>         
                    Revenue -- research and development
                    collaborative contracts......................   $     41,065     $     5,000   $     36,460
                    Costs and expenses:
                      Research and development:
                         Direct expenditures.....................         17,636          22,904         30,409
                         Payments under research services
                         agreement...............................          9,662          10,075         10,063
                                                                   -------------     -----------    -----------
                              Total research and development.....         27,298          32,979         40,472

                      General and administrative.................          6,840           8,745          9,639
                                                                     -----------     -----------    -----------
                         Total costs and expenses................         34,138          41,724         50,111
                                                                     -----------     -----------    -----------
                    Income (loss) from operations................          6,927         (36,724)       (13,651)
                    Interest income..............................          3,115           4,555          6,462
                    Interest expense.............................           (302)           (550)          (370)
                                                                     -----------     -----------    -----------
                    Income (loss) before taxes...................          9,740         (32,719)        (7,559)
                    Provision (benefit) for income taxes:
                      Current....................................          2,419          (1,651)           208
                      Deferred...................................             17              --             --
                                                                     -----------     -----------    -----------
                                                                           2,436          (1,651)           208
                                                                     -----------     -----------    -----------
                    NET INCOME (LOSS)............................   $      7,304     $   (31,068)   $    (7,767)
                                                                   =============     ===========    ===========
                    NET INCOME (LOSS) PER SHARE..................   $       0.47     $     (1.98)   $     (0.42)
                                                                   =============     ===========    ===========
                    Weighted average shares outstanding..........     15,543,375      15,723,144     18,630,986
                                                                    ============   =============  =============
</TABLE>

The accompanying notes to financial statements are an integral part hereof.




                                      F-5

<PAGE>



                           HUMAN GENOME SCIENCES, INC.
                       STATEMENTS OF STOCKHOLDERS' EQUITY
<TABLE>
<CAPTION>

                                                                                 Unearned
                                               Common Stock                     Portion of
                                            Number                Additional   Compensatory  Unrealized   Retained
                                              of                    Paid-In      Stock and      Gain      Earnings
                                            Shares       Amount     Capital      Warrants      (Loss)     (Deficit)     Total
                                                                        (dollars in thousands)
<S>                                      <C>            <C>      <C>           <C>           <C>        <C>         <C>     
      Balance-- December 31, 1993.......   14,555,874     $ 145    $ 80,696      $ (2,314)     $   --     $ (2,598)   $ 75,929
      Exercise of options...............       44,168         1          35            --          --           --          36
      Warrants exercised by lessor......      245,967         2          (2)           --          --           --          --
      Compensatory stock and warrants
        earned..........................           --        --          --           730          --           --         730
      Net income........................           --        --          --            --          --        7,304       7,304
      Unrealized (loss) on investments..           --        --          --            --        (214)          --        (214)
                                         ------------     -----    --------      --------      ------     --------    --------
      Balance-- December 31, 1994.......   14,846,009       148      80,729        (1,584)       (214)       4,706      83,785
      Exercise of options...............      113,691         1         932            --          --           --         933
      Warrants exercised................        7,499        --           1            --          --           --           1
      Warrants exercised by lessor......      216,330         2          (2)           --          --           --          --
      Issuance of common stock
      pursuant to public offering (net
        of expenses)....................    3,048,402        31      60,964            --          --           --      60,995
      
      Compensatory stock and
        warrants earned.................           --        --          --           699          --           --         699
      Net loss..........................           --        --          --            --          --      (31,068)    (31,068)
      Unrealized gain on investments....           --        --          --            --         261           --         261
                                         ------------     -----    --------      --------      ------     --------    --------
      Balance-- December 31, 1995.......   18,231,931       182     142,624          (885)         47      (26,362)    115,606
      Exercise of options...............      193,752         3       1,897            --          --           --       1,900
      Warrants exercised by lessor......       17,431        --          --            --          --           --          --
      Warrants exercised................        2,203        --          --            --          --           --          --
      Issuance of common stock in
        connection with SB Milestone III      339,065         3      18,062            --          --           --      18,065
      Compensatory stock and
        warrants earned.................           --        --          --           885          --           --         885
      Net loss..........................           --        --          --            --          --       (7,767)     (7,767)
      Unrealized (loss) on investments..           --        --          --            --        (168)          --        (168)
                                         ------------     -----    --------      --------      ------     --------    --------
      Balance-- December 31, 1996.......   18,784,382     $ 188    $162,583      $     --      $ (121)    $(34,129)   $128,521
                                         ============     =====    ========      ========      ======     ========    ========
</TABLE>

The accompanying notes to financial statements are an integral part hereof.

                                      F-6
<PAGE>



                           HUMAN GENOME SCIENCES, INC.
                            STATEMENTS OF CASH FLOWS
<TABLE>
<CAPTION>

                                                                                        Year Ended December 31,
                                                                                   1994          1995          1996
                                                                               ------------  ------------  --------
                                                                                       (dollars in thousands)
<S>                                                                             <C>           <C>           <C>       
              Cash flows from operating activities:
                Net income (loss)............................................    $  7,304      $(31,068)     $  (7,767)
                Adjustments to reconcile net income (loss) to net cash
                   provided by (used in) operating activities:
                   Accrued interest on U.S. Treasury bills and
                     commercial paper........................................        (350)         (251)          (857)
                   Depreciation and amortization.............................       3,061         4,395          5,858
                   Loss due to disposal and write-down of furniture and
                     equipment...............................................         257           665             66
                   Issuance of and accretion of compensatory stock and
                     warrants................................................         730           699            885
                   Changes in operating assets and liabilities:
                     Prepaid expenses and other current assets...............        (419)         (699)          (718)
                     Deferred tax asset......................................         353            --             --
                     Funds available-- facility fund.........................          --           (52)            --
                     Other assets............................................        (117)           12              3
                     Accounts payable and accrued expenses...................        (741)          305          1,376
                     Accrued payroll and related taxes.......................        (561)          143            428
                     Deferred income.........................................          --         2,000            537
                     Deferred income taxes...................................        (336)           --             --
                     Income taxes payable....................................       1,919        (2,134)            --
                     Other liabilities.......................................         337           (26)            (5)
                                                                                 --------      --------      ---------
                        Net cash provided by (used in) operating
                          activities.........................................      11,437       (26,011)          (194)
                                                                                 --------      --------      ---------
              Cash flows from investing activities:
                Capital expenditures-- furniture and equipment...............      (4,206)       (8,327)        (8,306)
                Proceeds from sale of furniture and equipment................          --           630             --
                Purchase of investments and marketable securities............     (78,741)      (98,717)      (182,030)
                Proceeds from sale and maturities of investments and
                   marketable securities.....................................      65,559        73,552        159,499
                                                                                 --------      --------      ---------
                        Net cash used in investing activities................     (17,388)      (32,862)       (30,837)
                                                                                 --------      --------      ---------
              Cash flows from financing activities:
                Proceeds from long-term debt.................................       1,699         2,353             --
                Repayment of long-term debt..................................          --          (444)          (444)
                Collateral on line of credit-- restricted....................      (2,000)           --            295
                Payments on capital lease obligations........................        (703)       (1,139)        (1,297)
                Proceeds from issuance of common stock (net of
                   expenses).................................................          36        61,929         19,965
                Assets held for resale-- expenditures........................         (41)           --             --
                                                 -- proceeds.................         176            --             --
                                                                                 --------      --------      ---------
                       Net cash (used in) provided by financing
                          Activities.........................................        (833)       62,699         18,519
                                                                                 --------      --------      ---------
              NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS...........      (6,784)        3,826        (12,512)
              Cash and cash equivalents-- beginning of year..................      42,811        36,027         39,853
                                                                                 --------      --------      ---------
              CASH AND CASH EQUIVALENTS-- END OF YEAR........................    $ 36,027      $ 39,853      $  27,341
                                                                                 ========      ========      =========
              Supplemental  disclosures  of cash  flow  information:
              Cash paid during the year for:
                   Interest..................................................    $    521      $    233      $     199
                   Income taxes..............................................         280           508            208
              See Note G for noncash exercise of warrants.

</TABLE>


The accompanying notes to financial statements are an integral part hereof.

                                      F-7
<PAGE>



                           HUMAN GENOME SCIENCES, INC.

                          NOTES TO FINANCIAL STATEMENTS

(NOTE A) -- THE COMPANY

     Human Genome Sciences,  Inc. (the "Company") was incorporated and commenced
operations  on June 26,  1992.  The  Company  is  engaged  in the  research  and
development of novel,  proprietary  pharmaceutical and diagnostic products based
on the  discovery  and  understanding  of the  medical  utility  of  genes.  The
Company's revenue is currently derived from contract research arrangements.  The
Company does not yet generate any revenues from product sales.

(NOTE B) -- SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

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  reported  amounts of assets and  liabilities  and
disclosure of  contingent  assets and  liabilities  at the date of the financial
statements  and the  reported  amounts  of  revenues  and  expenses  during  the
reporting period.
Actual results could differ from those estimates.

Depreciation and amortization:

     Depreciation is computed using the straight-line  method over the estimated
useful lives of the assets as follows:

                    Laboratory equipment.............. 3-- 10 years
                    Computers and EDP equipment....... 3 years
                    Furniture and office equipment.... 3-- 5 years
                    Leasehold improvements.............over the lease term

     Equipment  acquired  under capital lease  agreements is amortized  over the
terms of the leases ranging from three to four years.

Patent costs:

     Patent application costs are charged to expense as incurred.

Cash equivalents:

     The Company  considers all highly liquid investment  instruments  purchased
with a maturity of three months or less to be cash equivalents.  On December 31,
1995  and  1996,   the  Company  had  purchased   $5,244,000   and   $6,840,054,
respectively,  of U.S.  Government  securities  under  agreements  to  resell on
January  1, 1996 and 1997,  respectively.  Due to the  short-term  nature of the
agreements,  the Company did not take  possession of the  securities  which were
held by the  Company's  asset  managers.  The  market  value  of the  securities
approximated the carrying amount.

Investments:

     The   Company    classifies   its   investments    into   the   categories:
"held-to-maturity"  and  "available-for-sale",  each  of  which  have  different
accounting   treatment.   Investments  in  securities  that  are  classified  as
available-for-sale  and have  readily  determinable  fair values are measured at
fair market value in the balance sheet, and unrealized  holding gains and losses
for these  investments  are reported as a separate  component  of  stockholders'
equity until realized. Debt securities classified as held-to-maturity securities
will be carried at amortized cost.

Concentration of credit risk:

     The Company has invested its cash in obligations of the U.S. Government and
in commercial paper which bear minimal risk.

Research and development:

     Research and development costs are charged to expense as incurred.

Compensatory stock and warrants:

     The Company accounts for the difference between the issue or grant price of
compensatory  stock and warrants and fair value as "Unearned  Compensatory Stock
and  Warrants,"  which the  Company  charges to  operations  over their  vesting
period.

                                      F-8

<PAGE>





                           HUMAN GENOME SCIENCES, INC.

                   NOTES TO FINANCIAL STATEMENTS - (CONTINUED)

(NOTE B) - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

Stock-Based Compensation:

     During  1996,  the  Company  adopted  Statement  of  Financial   Accounting
Standards No. 123, "Accounting for Stock-Based Compensation" (SFAS No. 123). The
provisions of SFAS No. 123 allow  companies to either expense the estimated fair
value of stock options or to continue to follow the  intrinsic  value method set
forth in APB Opinion 25, "Accounting for Stock Issued to Employees" (APB 25) but
disclose  the pro forma  effects on net income  (loss) had the fair value of the
options  been  expensed.  The Company has elected to continue to apply APB 25 in
accounting  for its stock option  incentive  plans.  See Note L to the financial
statements for further information.

Net income (loss) per share:

     Net income (loss) per share is calculated using the weighted average number
of outstanding  shares of common stock.  Common stock issuable upon the exercise
of stock options or warrants is included in the calculation of net income (loss)
per share to the extent that its inclusion would have a dilutive effect.

Revenue recognition:

     Nonrefundable  license fees,  research payments,  and milestone payments in
connection with collaboration  agreements are recognized when they are earned in
accordance  with the applicable  performance  requirements  and / or contractual
terms.

Sources of supply:

     The Company currently relies on a single supplier,  Applied  Biosystems,  a
division of  Perkin-Elmer  Corporation,  to provide  all of its gene  sequencing
machines and certain  reagents  required in connection  with the gene sequencing
process.  The Company has not  experienced  problems  in  obtaining  either gene
sequencing machines or reagents in a timely manner.  While other gene sequencing
machines are  available,  the Company does not believe that such other  machines
are as efficient as the machines currently used by the Company. No assurance can
be given that either the gene  sequencing  machines or the reagents  will remain
available  in  commercial   quantities  at  costs  that  are  not   economically
prohibitive.

(NOTE C) -- INVESTMENTS

Investments,  including accrued interest,  at December 31, 1995 and 1996 were as
follows:
<TABLE>
<CAPTION>

                                December 31, 1995

                                              Amortized                Unrealized
                  Held to Maturity             Cost      Fair Value   Gain/(Loss)
<S>                                        <C>           <C>          <C>         
  Corporate debt securities..............  $ 58,529,000  $58,584,000  $     55,000
                                           ============  ===========  ============

                 Available for Sale

  U.S. Treasury and agencies.............  $  7,033,000  $ 7,080,000  $     47,000
                                           ============  ===========  ============

                                December 31, 1996


                  Held to Maturity

  Corporate debt securities..............  $ 58,282,000  $58,247,000  $    (35,000)
                                           ============  ===========  ============

                 Available for Sale

  U.S. Treasury and agencies.............  $ 15,262,000  $15,194,000  $    (68,000)
  Corporate debt securities..............    15,352,000   15,299,000       (53,000)
                                           ------------  -----------  ------------
                                           $ 30,614,000  $30,493,000  $   (121,000)
                                           ============  ===========  ============
</TABLE>

                                      F-9

<PAGE>



                           HUMAN GENOME SCIENCES, INC.

                   NOTES ON FIANCIAL STATEMENTS - (CONTINUED)


(NOTE D) -- AGREEMENTS WITH THE INSTITUTE FOR GENOMIC RESEARCH ("TIGR")

     Research Services Agreement:

     Effective  October 1, 1992,  the Company  entered into a ten-year  Research
Services  Agreement  (the  "Services  Agreement")  with  TIGR,  which is largely
dependent upon the Company for its funding.  The Services Agreement provides for
the payment of $65,000,000 over ten years in specified annual amounts payable in
quarterly  installments  and the provision of up to $5,000,000 of equipment (see
Note G). In return,  TIGR has  assigned to the Company all of its rights,  title
and interest in and to any invention  and patent  rights  stemming from research
funded by the Company. However, TIGR can conduct ongoing research under any such
invention  or  patent  free  of  any  royalty.   The  Company  is  to  bear  all
patent-related costs.

     Minimum payments pursuant to the Services Agreement for the next five years
are as follows:

                Year Ending December 31,
               -------------------------
                1997.....................  $7,375,000
                1998.....................  $7,000,000
                1999.....................  $7,000,000
                2000.....................  $6,750,000
                2001.....................  $5,587,500
                Thereafter...............  $3,262,500

     The Company also committed,  pursuant to an agreement dated April 19, 1993,
to  provide  to TIGR  (i) an  additional  $1  million  per  year  for 10  years,
commencing  on May 1,  1993,  to  enable  TIGR  to  enhance  its  bioinformatics
capacity, and (ii) certain additional amounts including compensation for certain
sequencing performed for the Company, reimbursement for salaries of certain TIGR
employees, a portion of TIGR's rent and utilities and other miscellaneous items.

Intellectual Property Agreement:

     Effective  October  2,  1992,  the  Company  also  entered  into a ten-year
intellectual property agreement with TIGR pursuant to which TIGR assigned all of
its interest in  inventions  and patent rights other than those  resulting  from
research  services  funded by the  Company  and  granted the Company a worldwide
noncancellable  license to any invention and patent right  stemming from funding
provided by U.S.  government and other  nonprofit  organizations.  In return for
such  license,  the Company is required to pay to TIGR a percentage of net sales
of, or sub-license income from, such inventions and patent rights.

Stock Purchase, Restriction and Repurchase Agreement:

     In connection with the intellectual  property  agreement,  the Company sold
1,609,884 shares (the "shares") of its common stock at $.01 per share to TIGR in
1993.

(NOTE E) -- COLLABORATION AGREEMENTS

Agreements with SmithKline Beecham Corporation:

     In May 1993, the Company entered into a collaboration agreement, as amended
("SB Collaboration Agreements"), providing SmithKline Beecham Corporation ("SB")
a first right to develop and market products in human and animal healthcare ("SB
Products"),  based upon human genes identified by the Company. In return, SB has
paid $125 million to the Company since 1993.  Approximately  $55 million related
to the purchase  price of  1,351,738  shares of common stock with the balance of
$70 million  recognized as revenue related to license fees,  option rights,  and
milestone  payments.  Of the $70 million  recognized as revenue since 1993,  $41
million and $6.9 were recognized as revenues during the years ended December 31,
1994 and 1996, respectively.

     The 1996  payment by SB of $25 million was made  pursuant to the  Company's
achievement of Milestone III. Pursuant to the SB Collaboration  Agreements,  the
payment was  allocated as follows.  The Company  sold  339,065  shares of common
stock to SB at $58.28 per share,  which was calculated  pursuant to the contract
as 125% of the average  market price of the Company's  common stock for the five
trading days preceding payment, for total proceeds of approximately $18,065,000.
The  remainder of the payment was allocated to the  deliverables  and other data
being transferred to SB and recorded by the Company as revenue.

                                      F-10

<PAGE>
                           HUMAN GENOME SCIENCES, INC.

                   NOTES ON FINANCIAL STATEMENTS - (CONTINUED)

     (NOTE E) - COLLABORATION AGREEMENTS - (CONTINUED)

     In addition,  the Company is entitled to (i)  royalties on the net sales of
SB Products,  (ii) product development progress payments and (iii) the option to
co-promote  up to 20% of any  product  developed  by SB under the  collaboration
agreement.

     In June 1996, the SB Collaboration  Agreements were  substantially  amended
(the  "SB  Amendment")  to allow  the  Company  and SB  together  to enter  into
collaboration    agreements    with    additional    pharmaceutical    companies
("Collaboration  Partners") in the SB Field (other than  diagnostics  and animal
healthcare  in  which  SB  has  generally  retained  exclusive  rights).  The SB
Amendment restricts the Company from entering into further collaborations in the
SB Field during the initial  research term (through June 2001).  The restriction
also applies to certain  products which are subject to research plans  submitted
by SB prior to the  expiration  of the  initial  research  term and for a period
thereafter.  SB has  the  right  to  extend  the  research  term  for up to five
additional  years by making  certain  payments,  which would extend the time for
submitting research plans as to therapeutic products.

     The SB Amendment provides that SB and the Company will share equally in any
license  fees  and  product   development   milestone   payments   paid  by  the
Collaboration Partners, that the Company will receive all royalties and research
payments paid by the  Collaboration  Partners.  The SB Collaboration  Agreements
provide for  payments to the Company by SB of royalties on net sales of products
based  on the  Company's  patents  or  technologies  within  the SB  Field  ("SB
Products") made by SB and milestone  payments in connection with the development
of SB Products.

Other Collaboration Agreements in the SB Field:

     In June 1995, the Company entered into an Option and License Agreement with
Takeda Chemical Industries, Ltd. ("Takeda") pursuant to which Takeda was granted
an exclusive option to license rights under the Company's patents and technology
in the  field of human  healthcare  (other  than  gene  therapy,  antisense  and
diagnostics)  to  make  and  sell a  limited  number  (equal  to the  number  of
collaboration  partners  other than SB and Takeda with which the Company  enters
into  collaboration  agreements  in the SB  field)  of  products  in  Japan.  In
consideration  of the grant of the  option,  Takeda paid the Company $5 million,
which was recognized as revenue by the Company in 1995, and agreed to pay to the
Company royalties based on the sale of Takeda products covered by the Option and
License Agreement and certain milestone payments.

     In June 1996,  the Company  and SB entered  into  collaboration  agreements
("New  Collaboration   Partner   Agreements")  with  Schering   Corporation  and
Schering-Plough  Ltd.  ("Schering  Plough"),  Synthelabo  S.A.,  and Merck  KGaA
("Merck"),  (collectively "New Collaboration  Partners").  The New Collaboration
Partner  Agreements  provide  the New  Collaboration  Partners  the  rights  and
licenses to access the Company's  Human Gene  Technology,  as well as biological
information  developed  by the  Company  and SB prior to, and in the case of the
Company,  after the effective date of such Agreement,  to discover,  develop and
commercialize products based upon or derived from such Company technology in the
SB Field (other than diagnostics and animal  healthcare).  The New Collaboration
Partners  are  obligated  to pay  license  fees,  research  payments,  milestone
payments and royalties in connection with the agreements.  The initial  research
term expires in June,  2001.  The New  Collaboration  Partners have the right to
extend the term for up to five  additional  years by making  certain  additional
payments.  Aggregate  license  fees and  research  payments  due  under  the New
Collaborative  Partner  Agreements are $140 million during the initial  research
term, of which the Company will be entitled to $87.5  million,  payable in equal
installments over a five-year period.  The Company has received $17.5 million of
the license fees,  research,  and additional payments during 1996 related to the
New Collaboration  Partner Agreements,  of which $16.5 million has been recorded
as revenue.

Collaborative Agreements Outside of the SB Field:

     In  January,  1996,  the  Company  entered  into a  comprehensive  Research
Collaboration  Agreement  in the field of corn  genomics  with  Pioneer  Hi-Bred
International,  Inc. ("Pioneer").  Under the terms of the agreement, the Company
will receive $16 million from Pioneer over three years for work performed  under
the  collaboration.  The relationship is exclusive for five years.  Pioneer will
own all sequence information and intellectual  property developed as a result of
this  collaboration.  The  Company  retains  commercial  rights  to use any gene
sequence  in human  health  and for  certain  specialty  and  industrial  enzyme
applications.  During 1996, pursuant to this agreement, the Company received and
recorded as revenue $8 million related to license fees and research payments. In
January 1997,  the Company  received an  additional $3 million  pursuant to this
agreement that the Company anticipates will be recognized as revenue in 1997.

                                      F-11

<PAGE>

                           HUMAN GENOME SCIENCES, INC.

                   NOTES ON FINANCIAL STATEMENTS - (CONTINUED)

     (NOTE E) - COLLABORATION AGREEMENTS - (CONTINUED)

     In  March,  1996 the  Company  entered  into a  License  Agreement  with F.
Hoffmann-La  Roche,  Ltd.  ("Roche")  to  sequence  and  assemble  the genome of
Streptococcus  pneumoniae,  a major  bacterial  pathogen  responsible for severe
respiratory  and other  infections.  Roche has  received  a license  to use this
information  to identify  potential new  anti-infectives  and  antibiotics.  The
Company received $2 million from Roche in 1995, which was recorded as revenue in
1996. The Company will receive research payments and potential future royalties.

     In  June  1996,  the  Company  entered  into a  Collaboration  and  License
Agreement  with  Schering-Plough  relating  to the field of human  gene  therapy
(including gene therapy vaccines to a limited extent). Under this agreement, the
Company has granted Schering-Plough a non-exclusive license to use the Company's
Human Gene Technology to conduct research,  and an option to obtain an exclusive
license to specific genes in the field of gene therapy.  The agreement  provides
that Schering-Plough will pay the Company a $5 million license fee (payable over
five years) for a  non-exclusive  research  license,  an option exercise fee and
development  milestone  payments for each gene for which it exercises its option
to  obtain an  exclusive  license  and  royalties  on net sales of gene  therapy
products  resulting from research  under the agreement.  The agreement is for an
initial term expiring June 2001,  subject to extension  until 2006 on payment of
certain amounts.  The Company has received $1 million for the license fee, which
the Company recorded as revenue.

     In October 1996, the Company entered into a License and Research  Agreement
with Pharmacia & Upjohn Company to sequence a certain genome. Pharmacia & Upjohn
Company has received  license rights to use this information to develop products
for the human  pharmaceutical and veterinary fields. The Company has received $3
million  from  Pharmacia  & Upjohn  Company  in 1996 of which  $1.5  million  is
recorded as deferred revenue.



(NOTE F) -- FURNITURE AND EQUIPMENT

     Furniture and equipment,  including  equipment  under capital  leases,  are
stated at cost and are summarized as follows:

                                                     December 31,
                                                  1995          1996
                                             ------------- ---------
  Laboratory equipment.....................   $12,555,000   $16,692,000
  Computers and EDP equipment..............     4,089,000     5,363,000
  Furniture and office equipment...........       694,000     1,010,000
  Leasehold improvements...................     6,134,000     7,777,000
                                              -----------   -----------
                                               23,472,000    30,842,000
  Less accumulated depreciation and 
    amortization...........................     7,467,000    12,811,000
                                              -----------   -----------
                                              $16,005,000   $18,031,000
                                              ===========   ===========
(NOTE G) -- EQUIPMENT LEASE OBLIGATIONS

     During  1993  and  1994,  the  Company  entered  into  sale  and  leaseback
agreements in connection with certain computer and laboratory equipment having a
net book value of $2,132,000 and $1,302,000,  respectively. The Company sold the
equipment for $2,198,000 and  $1,575,000,  respectively,  and entered into three
master lease agreements pursuant to which it leased back the above equipment for
initial terms of 48 months.  All of the equipment  leased under these agreements
have been accounted for as capital leases.

     In addition,  the Company  entered into other capital lease  agreements for
certain  equipment for initial  terms of 36 months.  Equipment  purchases  under
these leases were $92,000 and $934,000 for the years ended December 31, 1994 and
1995,  respectively.  The  recording of capital  leases is considered a non-cash
transaction,  and  therefore  is  excluded  from the  Statements  of Cash Flows.
Amortization  expense  related to equipment  under capital leases is included in
depreciation and amortization on the statements of cash flows.

     The  net  book  value  of the  equipment  held  under  capital  leases  was
$1,982,000 and $719,000 at December 31, 1995 and 1996, respectively.

                                      F-12

<PAGE>
                           HUMAN GENOME SCIENCES, INC.

                   NOTES ON FINANCIAL STATEMENTS - (CONTINUED)

(NOTE G) - EQUIPMENT LEASE OBLIGATIONS - (CONTINUED)

     Future lease payments as of December 31, 1996, are as follows:

             Year Ending December 31,
              1997.............................  $   874,000
              1998.............................      291,000
                                                 -----------
                                                   1,165,000
              Less amounts representing
                 interest......................       68,000
                                                 -----------
            
              Present value of future lease 
                 payments......................    1,097,000
              Less amounts due within one year.      811,000
                                                 -----------
              Amounts due after one year.......  $   286,000
                                                 ===========

     In  conjunction  with the master  lease  agreements,  the  Company  granted
warrants to the  lessors to  purchase  594,000  shares of the  Company's  common
stock,  which  the  Company  valued at $.27 per  warrant.  The  warrants  may be
exercised at a purchase price of $1.33 per share or by receiving shares equal to
the value (as  determined  by a formula)  of the  warrants by  surrender  of the
warrants.  The warrants contain registration and certain antidilution rights and
are exercisable through November 1998.

     In 1994, the lessors exercised  warrants for the purchase of 265,000 shares
by  electing  to  receive  245,967  shares,  equal to the value of the  warrants
surrendered. In 1995, the lessors exercised warrants for the purchase of 230,000
shares by electing to receive 216,330 shares, equal to the value of the warrants
surrendered.  In 1996,  a lessor  exercised  warrants for the purchase of 18,000
shares by electing to receive 17,431 shares,  equal to the value of the warrants
surrendered.

     Pursuant to the  Services  Agreement  (Note D), the  Company  has  provided
equipment with an aggregate purchase price of approximately  $5,000,000 which it
sold or assigned to a leasing  consortium which, in turn, leased it to TIGR (the
"Leases") over a four-year term; the Company funds the rental payments  required
by the Leases.  The Company has the right under  certain  circumstances  to take
possession of the equipment and assume the Leases.

     Future  funding  payments  relating to the Leases to be made to TIGR are as
follows:

                            Year Ending December 31,
                           -------------------------
                              1997...................  $ 454,000
                              1998...................     36,000
                                                       ---------
                                                       $ 490,000
                                                       =========
(NOTE H) -- OTHER ASSETS

     Other assets at December 31, 1995 and 1996,  include a note receivable from
an officer of  $891,000.  The note is due on demand and does not bear  interest.
The note is  collateralized by shares of the Company's common stock owned by the
officer that have a market value of at least 200% of the outstanding  balance of
the note.

(NOTE I) -- ACCOUNTS PAYABLE AND ACCRUED EXPENSES

         Accounts payable and accrued expenses are comprised of the following:

                                           December 31,
                                     1995          1996
                                 ------------  ------------
         Equipment purchases....  $  917,000    $  561,000
         Due to TIGR............          --            --
         Professional fees......     230,000       489,000
         Accrued registration  
           costs................       6,000            --
         Other accrued expenses.   1,188,000     2,311,000
                                  ----------    ----------
                                  $2,341,000    $3,361,000
                                  ==========    ==========
(NOTE J) -- LONG-TERM DEBT

     In December 1994,  the Company  entered into a loan agreement with Maryland
Industrial   Development   Financing   Authority   ("MIDFA").   Major  leasehold
improvements  were financed with the proceeds of a $4,000,000  taxable  variable
rate bond issue (the "Bonds") from MIDFA. The Company is required to make annual
payments of $444,000  commencing  December 1995 plus interest at a variable rate
of  interest  (5.91% at  December  31,  1995 and  5.64% at  December  31,  1996,
respectively), to the trustee on behalf of the bondholders which is equal to the
interest and principal  requirements on the bonds. The variable rate is equal to
50 basis points plus
                                      F-13

<PAGE>

                           HUMAN GENOME SCIENCES, INC.

                   NOTES ON FINANCIAL STATEMENTS - (CONTINUED)



     (NOTE J) - LONG -TERM DEBT - (CONTINUED)

     the  higher  of the  yield  equivalent  of the  average  30-day  or  90-day
commercial  paper rate.  Under certain  circumstances,  the rate may be adjusted
either  upward or downward but in no event in excess of 10 basis points above or
below the rate  determined  above.  MIDFA has entered into an indenture with the
Trustee  whereby  the Trustee has  obtained an  irrevocable  letter of credit on
behalf of the bondholders.

     The following funds were created under the terms of the trust indenture:

[1] Facility fund:

     The initial bond proceeds of $4 million were  deposited  into this fund and
disbursed in accordance with the agreement.  The funds were restricted under the
bond  agreement to be used for  leasehold  improvements  at one of the Company's
leased buildings.  As of December 31, 1995,  approximately  $4.1 million of bond
proceeds and accrued interest had been drawn from the fund.

[2] Bond fund:

     Required monthly principal  payments of $37,000 plus interest are deposited
into this fund beginning  January 1, 1995. The interest is disbursed  monthly to
the bondholders.  Principal is to be repaid from this fund to the bondholders at
the rate of  $444,000  annually  commencing  on  December  1,  1995 with a final
payment of  $448,000 on December 1, 2003.  The Company  deposited  $686,000  and
$632,000  of  principal  and  interest  into this fund  during  the years  ended
December 31, 1995 and 1996, respectively.

     In  connection  with  the  Loan  Agreement,  the  Company  entered  into an
irrevocable  Letter  of  Credit  Agreement  with a bank for the  account  of the
Company and in favor of the Trustee in the initial  amount of  $4,066,667  which
expires  on  December  15,  2003.  Concurrently,  the  Company  entered  into  a
Collateral  Pledge  Agreement with the bank. The Company is required to maintain
43% of the  outstanding  principal  amount of the Bonds (50% is  required  under
certain  circumstances)  with the bank as  Collateral  for the Letter of Credit.
Pursuant to the  Collateral  Pledge  Agreement at December 31, 1996, the Company
had  $1,705,000  on deposit with the bank that is invested in a U.S.  Government
agency  security.  The pledge  collateral  will be released upon the payment and
performance in full of the Company's Letter of Credit obligations. The agreement
contains covenants with respect to tangible net worth, cash and cash equivalents
and investment securities,  as well as other covenants and prohibits the payment
of cash  dividends.  During  1994,  the  Company  incurred  costs of $136,000 in
connection with this loan which are being amortized over the term of the loan.

                                      F-14


<PAGE>

                           HUMAN GENOME SCIENCES, INC.

                   NOTES ON FINANCIAL STATEMENTS - (CONTINUED)



(NOTE K) -- COMMITMENTS AND OTHER MATTERS

Operating leases:

     The Company leases office and laboratory premises and equipment pursuant to
operating  leases  expiring at various dates through  2003.  The leases  contain
various renewal options. Minimum annual rentals are as follows:

                     Year Ending December 31,
                    -------------------------
                       1997................... $  2,086,000
                       1998...................    1,948,000
                       1999...................    1,372,000
                       2000...................    1,307,000
                       2001...................    1,344,000
                       Thereafter.............    2,260,000
                                                  ---------
                                                 10,317,000
                     Less sub-lease income....       59,000
                                               ------------
                                               $ 10,258,000

     In 1994 and 1996, the Company entered into leases for office and laboratory
space which  provide for certain rent  abatement  and rent  escalations  on each
anniversary of the lease  commencement date. For financial  reporting  purposes,
rent expense is charged to operations on a straight-line  basis over the term of
the lease,  resulting in a liability  for deferred rent of $182,000 and $262,000
included in other liabilities at December 31, 1995 and 1996, respectively.

     Certain other leases  provide for  escalation  for increases in real estate
taxes and certain operating expenses, as well as various renewal terms.

     Rent expense  aggregated  $1,124,000,  $1,866,000,  and  $1,988,000 for the
years ended December 31, 1994, 1995 and 1996, respectively.

Capital expenditures:

      At December  31, 1995 and 1996,  the Company had  commitments  for capital
expenditures,  consisting primarily of laboratory  equipment,  of $2,100,000 and
$700,000, respectively.

401(k) Plan:

     Effective  January 15,  1993,  the Company  adopted a 401(k)  pension  plan
available  to  eligible  full-time  employees.  The Company  made  discretionary
contributions  of $97,000 and $168,000 to the plan for the years ended  December
31, 1995 and 1996.  The Company made no  contributions  to the plan for the year
ended December 31, 1994.

(NOTE L) -- STOCKHOLDERS' EQUITY

Preferred Stock:

     In November,  1993, the  shareholders  authorized a new series of preferred
stock  of  1,000,000  shares,  $.01 par  value,  none of which  was  issued  and
outstanding at December 31, 1995 and 1996.

Common Stock:

     The  Company has the right of first  refusal on the sale of certain  common
stock issued in connection with restricted stock purchase agreements.  The price
to be paid by the Company is $1.13 and $.19 per share less than the price of any
proposed sale for 561,160 shares and 246,052 shares, respectively.

Stock option plan:

     The Company  applies APB 25 in  accounting  for its stock option  incentive
plan  and,  accordingly,  recognizes  compensation  expense  for the  difference
between the fair value of the underlying common stock and the grant price of the
option at the date of grant.  The  effect of  applying  SFAS No. 123 on 1995 and
1996 pro forma net loss as stated above is not necessarily representative of the
effects on reported net loss for future years due to,  among other  things,  (1)
the vesting  period of the stock  options  and the (2) fair value of  additional
stock options in future years.  Had  compensation  cost for the Company's  stock
option plans been determined based

                                      F-15

<PAGE>
                           HUMAN GENOME SCIENCES, INC.

                   NOTES ON FINANCIAL STATEMENTS - (CONTINUED)



     (NOTE L) - STOCKHOLDERS' EQUITY - (CONTINUED)

     Stock option plan : (continued)

     upon the fair value at the grant date for awards under the plans consistent
with the  methodology  prescribed  under SFAS No. 123, the Company's net loss in
1995 and 1996 would have been approximately  $32.8 million and $12.9 million, or
$2.08 per share and $0.69 per share, respectively. The fair value of the options
granted  during  1995 and 1996 are  estimated  as $11.99  and  $16.92 per share,
respectively,  on the date of grant using the Black-Scholes option-pricing model
with the  following  assumptions:  dividend  yield  0%,  volatility  of  63.61%,
risk-free  interest rate of 5.61% for 1995 and 6.28% for 1996, and expected life
of 6 years.

     The 1993 Employee Incentive and Non-qualified  Stock Option Plan (the "1993
Plan")  provides for the granting of options to purchase up to 565,827 shares of
the Company's common stock, at a price, for the incentive options, not less than
the fair  market  value of the common  stock on the date of grant.  The  vesting
period of the options is  determined  by the Board of Directors and is generally
five years. Outstanding options expire after ten years.

     Additional  information  with  respect to 1993  Stock  Option  activity  is
summarized as follows:
<TABLE>
<CAPTION>

                                                                    YEARS ENDED DECEMBER 31,
                                                     1994                     1995                     1996
                                           -----------------------  -----------------------  -------------------------
                                                         WEIGHTED-                WEIGHTED-                WEIGHTED-
                                                          AVERAGE                  AVERAGE                  AVERAGE
                                                         EXERCISE                 EXERCISE                 EXERCISE
                                             SHARES        PRICE       SHARES       PRICE       SHARES       PRICE
                                            --------    ----------   ---------   -----------  ---------   -----------
<S>                                          <C>         <C>           <C>        <C>           <C>        <C>    
                 Outstanding at beginning 
                   year...................   528,346     $  4.11       428,592    $  4.40       399,111    $  9.16
                 Options granted..........    26,500       17.49        78,455      27.50            --         --
                 Options exercised........   (44,168)        .81       (73,449)      2.98       (96,128)      2.07
                 Options canceled or 
                    expired ..............   (82,086)       8.67       (34,487)      4.89        (9,365)     17.90
                                            --------                 ---------                ---------
                 Outstanding at end of 
                    year..................   428,592        4.40       399,111       9.16       293,618      11.21
                                            ========                 =========                =========
                 Options exercisable at
                   year-end...............    70,625        2.62       118,724       3.27       148,900       9.25
                                            ========                 =========                =========
</TABLE>

     The following table summarizes  information about stock options outstanding
at December 31, 1996:

<TABLE>
<CAPTION>

                                                       OPTIONS OUTSTANDING                    OPTIONS EXERCISABLE
                                          --------------------------------------------  -----------------------------
                                                            WEIGHTED-
                                                             AVERAGE        WEIGHTED-                     WEIGHTED-
                                                            REMAINING        AVERAGE                       AVERAGE
                                             NUMBER     CONTRACTUAL LIFE    EXERCISE        NUMBER        EXERCISE
                 RANGE OF EXERCISE PRICE   OUTSTANDING     (IN YEARS)         PRICE       EXERCISABLE       PRICE
                ------------------------  ------------  ---------------  -------------  --------------  -------------
<S>                                          <C>                <C>          <C>             <C>           <C>    
                $.20 to $6.00..........      141,198            6.4          $  2.45         84,948        $  1.99
                $9.00 to $27.50........      152,420            7.9            19.31         63,952          18.99
                                            --------          -----          -------       --------        -------
                                             293,618            7.2          $ 11.21        148,900        $  9.25
                                            ========          =====          =======       ========        =======
</TABLE>

     On March 14,  1994,  the  Company  adopted a 1994  Employee  Incentive  and
Nonqualified  Stock Option Plan (the "1994 Plan") for the granting of options to
purchase up to 950,000 shares of common stock to officers, employees, directors,
consultants and  non-employee  directors.  The exercise price of options granted
under the plan may not be less than the  market  price on the date of grant.  In
May, 1996, an amendment was approved to increase the number of shares  available
for issuance from 950,000  options to 2,450,000  options.  The vesting period of
the options is determined by the Board of Directors and is generally five years.
Outstanding options expire after ten years.

                                      F-16



<PAGE>

                           HUMAN GENOME SCIENCES, INC.

                   NOTES ON FINANCIAL STATEMENTS - (CONTINUED)



     (NOTE L) - STOCKHOLDERS' EQUITY - (CONTINUED)

     Stock  Option Plan: (continued)

     Additional  information  with  respect to 1994  Stock  Option  activity  is
summarized as follows:
<TABLE>
<CAPTION>

                                                                        Years Ended December 31,
                                                         1994                     1995                     1996
                                                ----------------------  ------------------------ --------------------------
                                                             Weighted-                Weighted-                 Weighted-
                                                              Average                  Average                   Average
                                                              Exercise                 Exercise                  Exercise
                                                   Shares       Price       Shares       Price       Shares        Price
                                                 --------     --------   ---------    ---------  -----------    ----------
<S>                                               <C>           <C>        <C>          <C>        <C>            <C>  
                 Outstanding at beginning of  
                   year........................        --     $    --      655,958    $ 18.01        884,214    $ 18.01
                 Options granted...............   664,958       18.03      348,263      17.86        790,616      32.18
                 Options exercised.............        --          --      (40,242)     17.75        (97,624)     17.42
                 Options canceled or expired...    (9,000)      19.38      (79,765)     17.54        (48,427)     20.58
                                                 --------                ---------               -----------
                 Outstanding at end of year....   655,958       18.01      884,214      18.01      1,528,779      25.29
                                                 ========                =========               ===========
                 Options exercisable at
                   year-end....................    80,000     $ 17.84      190,861    $ 17.52        348,533    $ 20.05
                                                 ========                =========               ===========
</TABLE>

     The following table summarizes  information about stock options outstanding
at December 31, 1996:

<TABLE>
<CAPTION>

                                                        Options Outstanding                  Options Exercisable
                                           -------------------------------------------  ---------------------------
                                                             Weighted-
                                                             Average        Weighted-                     Weighted-
                                                            Remaining        Average                       Average
                                              Number    Contractual Life    Exercise        Number        Exercise
                  Range of Exercise Price   Outstanding    (In Years)         Price       Exercisable       Price
                 -------------------------------------- ---------------  -------------  -------------  -------------
<S>                                          <C>              <C>         <C>             <C>           <C>     
                 $12.75 to $22.00.......       672,163          7.7         $  17.15        265,883       $  17.53
                 $23.50 to $33.88.......       460,400          8.8            26.44         62,550          25.07
                 $36.25 to $42.56.......       396,216          9.8            37.78         20,100          37.77
                                            ----------        -----         --------      ---------       --------
                                             1,528,779          8.6         $  25.29        348,533       $  20.05
                                            ==========        =====         ========      =========       ========
</TABLE>

     On January 21, 1997, the Company granted options to purchase 500,000 shares
of common stock to an officer.

     At December  31,  1995,  options for 49,099 and 25,544 were  available  for
future  grant under the 1993 Plan and 1994 Plan,  respectively.  At December 31,
1996,  options for 58,464 and 783,355 were  available for future grant under the
1993 Plan and 1994 Plan, respectively.

     Reserved for issuance:

     The Company has also  reserved  shares of common  stock for  issuance  upon
exercise of warrants and options as follows:

   (i)   Warrants issued in conjunction with leasing 
          agreements (Note G)...................................      81,000
  (ii)   Warrants issued to certain stockholders (a)............      65,286
 (iii)   Stock option plan -- 1993 plan.........................     352,082
  (iv)   Stock option plan -- 1994 plan.........................   2,312,134
   (a)   These  warrants  were  issued  in  connection   with  a
         commitment  made  by  certain  stockholders;  they  are
         exercisable  at $.20 per share and  expire in  December
         1998. In connection  therewith,  the Company recorded a
         non cash interest charge of $7,500 in 1993.

                                      F-17


<PAGE>
                           HUMAN GENOME SCIENCES, INC.

                   NOTES ON FINANCIAL STATEMENTS - (CONTINUED)


(NOTE M) -- Income Taxes

     The Company  provides  for income  taxes using the  liability  method.  The
difference  between the tax  provision  and the amount that would be computed by
applying  the  statutory  Federal  income  tax rate to  income  before  taxes is
attributable to the following:
<TABLE>
<CAPTION>

                                                               Year Ended December 31,
                                                        1994            1995            1996
                                                   --------------  --------------  ---------
<S>                                                  <C>            <C>              <C>         
        Federal income tax provision at 34%......    $ 3,296,000    $(11,124,000)    $(2,570,000)
        State taxes, net of federal effect.......        485,000      (1,511,000)             --
        Expenses for which no tax benefit is
           available.............................         90,000          96,000         112,000
        Utilization of net operating loss 
           carry  forward........................     (1,338,000)             --              --
        Increase in valuation allowance on 
           deferred tax assets...................        318,000      12,484,000       3,262,000
        State taxes and valuation allowance 
           change................................             --              --        (391,000)
        Partial utilization of tax credits.......       (395,000)             --              --
        Foreign taxes paid.......................             --         500,000         225,000
        Tax credits generated and not used.......             --      (2,305,000)       (403,000)
        Other....................................        (20,000)        209,000         (27,000)
                                                     -----------    ------------     -----------
                                                     $ 2,436,000    $ (1,651,000)    $   208,000
                                                     ===========    ============     ===========
</TABLE>

Temporary  differences  and carry  forwards  which  give  rise to a  significant
portion of deferred tax assets and liabilities are as follows:
<TABLE>
<CAPTION>

                                                                                 Current        Long-Term
                                                                            Asset/(Liability) Asset/(Liability)
                                                                            ----------------- ----------------
<S>                                                                            <C>               <C>          
                          December 31, 1995                                                                   
                            Net operating loss carry forward..............     $      --         $ 9,384,000  
                            Research and development tax credit carry 
                               forward....................................            --           4,347,000  
                            Deferred start-up costs.......................        41,000              41,000  
                            Unearned portion of compensatory stock and 
                               warrants...................................      (180,000)            (60,000) 
                            Other.........................................       173,000              93,000  
                                                                               ---------         -----------  
                                                                                  34,000          13,805,000  
                            Less valuation allowance......................       (34,000)        (13,805,000) 
                                                                               ---------         -----------  
                                                                               $      --         $        --  
                                                                               ---------         -----------  
                          December 31, 1996                                                                   
                            Net operating loss carry forward..............     $      --         $11,808,000  
                            Research and development tax credit carry 
                               forward....................................            --           4,750,000  
                            Deferred start-up costs.......................        41,000                  --  
                            Other.........................................       218,000             262,000  
                                                                               ---------         -----------  
                                                                                 259,000          16,820,000  
                            Less valuation allowance......................      (259,000)        (16,820,000) 
                                                                               ---------         -----------  
                                                                               $      --         $        --  
                                                                               =========         ===========    
</TABLE>

     The  Company  recognized  a valuation  allowance  to the full extent of its
deferred tax assets since the likelihood of realization of the benefit cannot be
determined.

     Provision for income taxes is comprised of the following:

                            Year Ended December 31,
                    -----------------------------------------
                      1994           1995             1996
                    ----------  -------------      ----------
  Current:
    Federal........ $1,911,000   $(1,643,000)      $     --
    State..........    508,000      (508,000)       (17,000)
    Foreign taxes..         --       500,000        225,000
  Deferred.........     17,000            --             --
                    ----------    ----------       --------
                    $2,436,000   $(1,651,000)      $208,000
                    ==========    ===========      ========

                                      F-18

<PAGE>



                   HUMAN GENOME SCIENCES, INC.

           NOTES ON FINANCIAL STATEMENT - (CONTINUED)



     (NOTE M) - INCOME TAXES (CONTINUED)

     The Company has available tax credit carry forwards expiring as follows:

                       2000.........  $  500,000
                       2001.........     225,000
                       2008.........     745,000
                       2009.........   1,297,000
                       2010.........     783,000
                       2011.........     962,000
                       No expiration     238,000
                                      ----------
                                      $4,750,000
                                      ==========
     The Company has net operating  loss carry  forwards for federal  income tax
purposes of approximately $30 million which expire, if unused, in the year 2011.



(NOTE - N) - EVENT  (UNAUDITED)  SUBSEQUENT  TO  DATE OF  INDEPENDENT  AUDITOR'S
             REPORT

     On March 19,  1997,  the Company  completed a public  offering of 3,000,000
shares of its common stock with net proceeds of $105 million.




                                      F-19


<PAGE>


             
                                  EXHIBIT INDEX

                                                                          Page
Exhibit                                                                    No.
- -------                                                                    ---

10.44      Employment Agreement,  dated February 25, 1997, with William     *
           A. Haseltine, Ph.D.

23.1       Consents  of Ernst & Yong LLP, Independent  Auditors             *

23.2       Consent of Richard A. Eisner & Company, LLP, Independent        *
           Auditors

27         Financial Data Schedule           




 
                              EMPLOYMENT AGREEMENT

         THIS  AGREEMENT  dated the 25th day of February,  1997 (the  "Effective
Date")  between  HUMAN  GENOME  SCIENCES,  INC.,  a  Delaware  corporation  (the
"Corporation") and William A. Haseltine, Ph.D. (the "Employee").

                                   WITNESSETH:

         WHEREAS, the Corporation desires to employ the Employee as its Chairman
and Chief Executive Officer; and

         WHEREAS,  the Employee desires to accept such employment upon the terms
and conditions set forth herein.

         NOW,   THEREFORE,   in   consideration  of  the  mutual  covenants  and
obligations hereinafter set forth, the parties hereto agree as follows:

         1.  Employment.  The Corporation  hereby employs the Employee,  and the
Employee hereby accepts continued  employment by the Corporation as the Chairman
and Chief Executive Officer of the Corporation upon the terms and conditions set
forth herein.

         2. Term.  Except as provided  below,  the term of this Agreement  shall
commence "Effective Date" and end on the third anniversary of the Effective Date
of this Agreement (the "Initial  Term").  The Agreement  shall be  automatically
extended for  successive  one year periods,  unless four (4) months prior to the
end of the  applicable  term either party  notifies the other in writing that it
elects  to  terminate  the  Agreement.  The  Initial  Term and any one year term
extensions thereafter are hereinafter referred to as the "Term of Employment."

         3. Duties.  The Employee shall be employed in an executive  capacity as
the Chairman and Chief Executive Officer of the Corporation.  The Employee shall
perform  such  duties and  services,  consistent  with his  position,  as may be
assigned to him from time to time by the Board of Directors of the  Corporation.
In  furtherance  of the  foregoing,  the Employee  hereby  agrees to perform the
aforesaid duties and  responsibilities and the other reasonable senior executive
duties and responsibilities assigned to him from time to time. The office of the


<PAGE>



         Corporation   to  which   Employee  shall  be  assigned  shall  be  the
Corporation's  present  office in  Rockville,  Maryland or any other  office the
Corporation  may  establish  in its  discretion  within  thirty  (30)  miles  of
Rockville, Maryland.

         The  Corporation  shall  also  recommend  to  the  shareholders  of the
Corporation that Employee be named as a Director of the Corporation and a member
of the Executive Committee during the Term of Employment.

         4.       Time to be Devoted to Employment.

         (a) Except for  reasonable  vacations (to consist of four (4) weeks per
year) and absences due to temporary illness, during the Term of Employment,  the
Employee  shall devote  substantially  his full  business time and energy to the
business of the Corporation.

         (b) During the Term of Employment, the Employee shall not be engaged in
any  other  business   activity  which,  in  the  reasonable   judgment  of  the
Corporation, conflicts with the duties of the Employee hereunder, whether or not
such activity is pursued for gain, profit or other pecuniary advantage.  Subject
to Section 14 hereof,  the  Corporation  agrees that Employee may be a member of
and/or  consultant to Healthcare  Investment  Corporation,  Scientific  Advisory
Board; Goddard College, Vermont; University of Maryland Biotechnology Institute,
Board of Visitors;  National  Museum of American  History,  Board of  Directors;
Institute of Human Virology at the University of Maryland,  Baltimore,  Board of
Visitors;  AIDS Crisis Trust,  Medical  Adviser;  numerous  editorial boards and
professional  societies,  plus any  others  approved  by the Board of  Directors
(collectively  the  "Permitted   Relationships")  provided  that  the  Permitted
Relationships do not materially interfere with the performance of his duties and
obligations with respect to the Corporation.

         (c)  Notwithstanding  Paragraphs  4(a) and  4(b),  and  subject  to the
obligations of confidentiality  set forth in this Agreement,  the Employee shall
not be prevented from (i) writing and publishing books, treatises,  articles and
other  publications,  or  (ii)  teaching,  lecturing,  conducting  seminars,  or
engaging in similar activities for not-for-profit entities;  provided,  however,
that the  activities  of the  Employee  described  in (i) and (ii)  above do not
materially  interfere with the  performance of his duties and  obligations  with
respect to the Corporation.

         5.       Compensation; Reimbursement.


<PAGE>




         (a)  During  the  Term  of  Employment,  the  Corporation  (or  at  the
Corporation's  option,  any  subsidiary or affiliate  thereof)  shall pay to the
Employee an annual base salary ("Base  Salary") of Three Hundred Fifty  Thousand
Dollars ($350,000),  payable in installments as is the policy of the Corporation
with  respect  to  employees  of  the  Corporation  at  substantially  the  same
employment level as the Employee,  but in no event less frequently than once per
month.  Thereafter,  the Base Salary  shall be subject to increase at the option
and in the sole discretion of the Board of Directors of the Corporation based on
the performance of Employee.

         (b) As of December of each calendar year during the Term of Employment,
Employee  shall be entitled  to an annual  bonus as  determined  by the Board of
Directors of the Corporation based on Employee's performance.

         (c) (i) During the Term of  Employment,  the Employee shall be entitled
to  medical  insurance  coverage  (the  cost  of  which  shall  be  paid  by the
Corporation)  and to such other fringe  benefits as are made available from time
to time to the employees of the Corporation at substantially the same employment
level as the Employee,  including, without limitation, four weeks paid vacation.
In lieu of participation in any corporate  sponsored  medical  insurance plan of
the  Corporation,  and  whether  or not the  Corporation  provides  such a plan,
Employee shall have the right to convert his current medical insurance  coverage
to an  individual  policy  and  to  maintain  such  policy  or  one  essentially
equivalent thereto and to have the Corporation pay the premium therefor (up to a
maximum  annual premium of $7,500) during the Term of Employment it being agreed
and understood that Employee may elect to terminate any such  individual  policy
and  participate  in a corporate  sponsored  medical  insurance plan at any time
during the Term of Employment at the Corporation's expense and without regard to
the premium therefor.
                   (ii)  Upon  the  termination  of  the  Employee's  employment
hereunder pursuant to a Constructive Termination or a Termination Without Cause,
Employee  shall  have the  right to  continue  his  current  individual  medical
insurance policy,  or convert his current corporate  sponsored medical insurance
coverage to an individual policy, and to maintain such policy or one essentially
equivalent thereto and to have the Corporation pay the premium therefor (up to a
maximum annual  premium of $7,500) for a period of twenty-four  months after the
termination of


<PAGE>



employment.

         (d) The Corporation  shall reimburse  Employee,  in accordance with the
practice  from  time to time for  other  officers  of the  Corporation,  for all
reasonable and necessary traveling expenses,  disbursements and other reasonable
and  necessary  incidental  expenses  incurred  by him for or on  behalf  of the
Corporation in the performance of his duties hereunder upon  presentation by the
Employee to the Corporation of appropriate vouchers.

         (e)  During  the Term of  Employment,  the  Corporation  shall  provide
Employee with a monthly  automobile  allowance  (or an automobile  leased in the
Corporation's  name with the  rental  payment  paid by the  Corporation)  not to
exceed Eight Hundred and Fifty Dollars ($850.00) per month, to cover the cost of
Employee's  purchase or lease of a car. The Corporation shall reimburse Employee
for federal,  state and local income taxes (but not  penalties or interest)  due
and payable to Employee as a result of receipt of said  automobile  allowance or
use of the Corporation's leased automobile hereunder.

         6.       Involuntary Termination.

         (a) If the Employee is incapacitated or disabled by accident,  sickness
or otherwise so as to render him mentally or physically  incapable of performing
the services  required to be performed by him under this  Agreement for a period
of one  hundred  twenty  (120) days (with at least sixty (60) of such days being
consecutive)  during any ten-month period,  the Corporation may, at that time or
within a  reasonable  time  thereafter,  at its option,  with the  approval of a
majority of the Board of Directors of the Corporation,  terminate the employment
of the Employee and the Term of Employment under this Agreement immediately upon
giving him notice to that effect  (such  termination,  as well as a  termination
under   Section  6(b)  hereof,   being   hereinafter   called  an   "Involuntary
Termination").  Until the  Corporation  shall  have  terminated  the  Employee's
employment  hereunder in accordance  with the  foregoing,  the Employee shall be
entitled  to receive  his  compensation,  notwithstanding  any such  physical or
mental disability.

         (b) If the Employee dies during the Term of Employment,  his employment
hereunder and the Term of Employment  shall be deemed to cease as of the date of
his death.

         7.  Termination For Cause.  The Corporation may, with the approval of a
majority of the Board of Directors of the Corporation,  terminate the employment
of the


<PAGE>



Employee  hereunder  and the Term of  Employment  at any time during the Term of
Employment for "cause" (such termination being hereinafter called a "Termination
For Cause") by giving the Employee notice of such  termination,  upon the giving
of which such  termination  shall take effect  immediately.  For the purposes of
this Section 7, "cause" shall mean (i) the Employee's  willful  misconduct  with
respect to the  business and affairs of the  Corporation  or any  subsidiary  or
affiliate thereof, which action materially and adversely affects the business or
affairs of the  Corporation  or any  subsidiary or affiliate  thereof,  (ii) the
Employee  fails in any material  respect to observe and perform his  obligations
and duties  hereunder and such failure shall not be cured by the Employee within
thirty  (30) days of written  notice  thereof  from the  Corporation,  (iii) the
commission by the Employee of an act involving embezzlement or fraud against the
Corporation  or commission or conviction of a felony or (iv) the repeated use by
the Employee of alcohol in a manner which impairs his duties or the repeated use
of an illegal substance other than under a physician's prescription.

         8. Constructive Termination.  A "constructive  termination" shall occur
when  Employee  resigns  within six  months of any one or more of the  following
events: (i) any reduction in his level of Base Salary,  (ii) a relocation of his
place of employment  to a location  more than thirty (30) miles from  Rockville,
Maryland,  or (iii)  any  significant  change  in his  responsibilities.  Upon a
Constructive Termination,  Employee shall be entitled to receive, in addition to
the  amounts  payable  pursuant to Section 11 upon a  Constructive  Termination,
severance  pay for a period of  twenty-four  months  at the rate of Base  Salary
prior to any reduction  which caused a Constructive  Termination.  The severance
pay shall be paid in the same installments as salary is paid.

         9. Termination Without Cause.The  Corporation may, with the approval of
a  majority  of the  Board  of  Directors  of  the  Corporation,  terminate  the
employment  of the Employee  hereunder  and the Term of  Employment  at any time
during  the Term of  Employment  without  "cause"  upon  thirty  (30) days prior
written notice (such termination being hereinafter called a "Termination Without
Cause"). If the Corporation fails in any material respect to observe and perform
its  obligations  and duties under this  Agreement and such failure shall not be
cured by the Corporation  within thirty (30) days of written notice thereof from
the Employee, the


<PAGE>



Employee may terminate the employment of the Employee and the Term of Employment
under this  Agreement  immediately  upon giving the  Corporation  notice to that
effect (such termination  being  hereinafter also called a "Termination  Without
Cause").  Upon a  Termination  Without  Cause,  Employee  shall be  entitled  to
receive,  in  addition  to the  amounts  payable  pursuant  to Section 11 upon a
Termination  Without Cause,  severance pay for a period of twenty-four months at
the  rate of the  Base  Salary.  The  severance  pay  shall  be paid in the same
installments as salary is paid.

         10.  Voluntary  Termination.  Any  termination of the employment of the
Employee hereunder otherwise than as a result of an Involuntary  Termination,  a
Termination  For Cause, a  Constructive  Termination,  or a Termination  Without
Cause shall be deemed to be a "Voluntary  Termination".  A Voluntary Termination
shall be deemed to be effective immediately upon such termination.

         11.      Effect of Termination of Employment.

         (a)  Upon  the  termination  of  the  Employee's  employment  hereunder
pursuant to a Voluntary  Termination,  Involuntary  Termination or a Termination
For Cause,  neither the  Employee nor his  beneficiary  or estate shall have any
further rights or claims against the Corporation  under this Agreement except to
receive vested stock options and stock as set forth in separate contracts and:

               (i) the unpaid portion of the Base Salary provided for in Section
               5.1(a),  computed on a pro rata basis to the date of termination,
               plus any accrued and unpaid bonus with respect to any prior year;

               (ii)  reimbursement for any expenses for which the Employee shall
               not have  theretofore  been  reimbursed  as  provided  in Section
               5.1(d);

               (iii) payment of all accrued and unused vacation time;

               (iv) any and all vested benefits under  retirement plans or other
               qualified  or   non-qualified   plans  in  which  Employee  is  a
               participant at the time of termination, subject to applicable law
               and such plans; and

               (v) in the event of a termination  other than a  Termination  For
               Cause or a Voluntary  Termination,  a pro rata share of the bonus
               determined pursuant to


<PAGE>



               paragraph 5.1(b) for the year of termination.

         (b)  Upon  the  termination  of  the  Employee's  employment  hereunder
pursuant to a Constructive  Termination or a Termination Without Cause,  neither
the Employee  nor his  beneficiary  or estate  shall have any further  rights or
claims  against  the  Corporation  under this  Agreement  except to receive  the
termination  payments  equal to those  provided for in the Section 11(a) hereof,
plus the  amounts set forth in Section 8 or 9, as  appropriate,  plus the vested
stock options and stock as provided in separate contracts.

         12.      General Provisions.

         (a) This  Agreement  and any or all terms  hereof  may not be  changed,
waived,  discharged,  or terminated  orally, but only by way of an instrument in
writing signed by the parties.

         (b) This  Agreement  shall be governed by and  construed in  accordance
with the laws of the State of Maryland,  without  reference to the  conflicts of
laws of the State of Maryland or any other jurisdiction.

         (c) If any  portion of this  Agreement  shall be found to be invalid or
contrary  to public  policy,  the same may be modified or stricken by a court of
competent  jurisdiction,  to the extent  necessary to allow the court to enforce
such  provision in a manner which is as consistent  with the original  intent of
the  provision as possible.  The  striking or  modification  by the court of any
provision shall not have the effect of invalidating the Agreement as a whole.

         (d) This  Agreement  constitutes  the  entire and  exclusive  agreement
between Employee and Corporation  pertaining to the subject matter thereof,  and
supersedes and replaces any and all earlier agreements.

         (e) The  obligations of Sections 9, 11, 12, 13, 14 and 15 shall survive
termination of this Agreement.

         13.  Corporation  Rights to Intellectual  Property.  The Employee shall
promptly  disclose,  grant and assign  ownership to the Corporation for its sole
use and benefit any and all inventions, improvements, information and copyrights
(whether patentable or not), which he may develop,  acquire,  conceive or reduce
to practice  while  employed  by the  Corporation  (whether or not during  usual
working  hours),   together  with  all  patent  applications,   letters  patent,
copyrights


<PAGE>



and  reissues  thereof  that  may at any  time be  granted  for or upon any such
invention,  improvement or information;  provided,  however, that Employee shall
own any invention  which Employee can  demonstrate  has no  relationship  to the
business of the Corporation  and which was neither  conceived nor made by use of
any of the time,  facilities  or materials  of the  Corporation.  In  connection
therewith:

                  (i) The Employee shall without  charge,  but at the expense of
         the  Corporation,  promptly at all times hereafter  execute and deliver
         such applications,  assignments,  descriptions and other instruments as
         may be reasonably necessary or proper in the opinion of the Corporation
         to  vest  title  to  any  such  inventions,   improvements,   technical
         information,  patent  applications,  patents,  copyrights  or  reissues
         thereof in the  Corporation and to enable it to obtain and maintain the
         entire right and title thereto throughout the world; and

                  (ii) The  Employee  shall  render  to the  Corporation  at its
         expense   (including   reimbursement  to  the  Employee  of  reasonable
         out-of-pocket  expenses  incurred  by  the  Employee  and a  reasonable
         payment for the Employee's  time involved in case he is not then in its
         employ) all such  assistance  as it may require in the  prosecution  of
         applications for said patents,  copyrights or reissues thereof,  in the
         prosecution or defense of interferences which may be declared involving
         any said  applications,  patents or copyrights and in any litigation in
         which the  Corporation  may be involved  relating to any such  patents,
         inventions, improvements or technical information.

         In the event the Corporation  gives written notice to Employee that the
Corporation elects not to apply for a patent in a jurisdiction for an item above
which is  patentable,  then Employee  may, at his cost and expense,  apply for a
patent therefor on his own name in such jurisdiction.

         14.      Protection of Information.

         (a) Employee hereby  covenants with  Corporation  that,  throughout the
Term of Employment, Employee will serve Corporation's best interests loyally and
diligently.  Throughout the course of employment by Corporation  and thereafter,
Employee will not disclose or provide to any person, firm, corporation or entity
(except as appropriate in connection with his services to the  Corporation)  any
information, materials, fbiologics or animals which are owned by


<PAGE>



the  Corporation  or which come into the  possession of the  Corporation  from a
third  party  under  an  obligation  of  confidentiality,   including,   without
limitation,  information relating to trade secrets, business methods,  products,
processes, procedures, development or experimental projects, suppliers, customer
lists  or the  needs  of  customers  or  prospective  customers,  clients,  etc.
(collectively "Confidential Information"), which Confidential Information, comes
into his possession or knowledge during the Term of Employment,  and he will not
use such Confidential Information for his own purposes or for the purpose of any
person, firm, corporation or entity other than the Corporation.

         (b) The  provisions  of Section  14(a) shall not apply to the following
Confidential Information:

                  (i) Confidential  Information  which at the time of disclosure
is already in the public domain;

                  (ii)   Confidential   Information   which  the   Employee  can
demonstrate  by written  evidence was in his possession or known to him prior to
the effective date of initial employment by the Corporation which is not subject
to an obligation of confidentiality to the Corporation;

                  (iii) Confidential Information which subsequently becomes part
of the public domain through no fault of the Employee;

                  (iv)  Confidential  Information  which  becomes  known  to the
Employee through a third party who is under no obligation of  confidentiality to
the Corporation; and

                  (v) Confidential Information which is required to be disclosed
by law or by judicial administrative proceedings.

         15. Non-Compete. Employee agrees that during the Term of Employment and
(a) for a period  of two  years  thereafter  during  which  salary  continuation
payments are made to Employee pursuant to Section 8 or 9, as appropriate or, (b)
for a  period  of  twelve  (12)  months  following  his  Voluntary  Termination,
Involuntary  Termination,  or  Termination  for Cause he shall not  directly  or
indirectly  be  engaged  in or assist  others in  engaging  in any  business  or
activity which is predominantly  involved in research for determining  human and
non-human   animal  and/or  plant  gene  sequences  or  which  is   researching,
developing, making or selling products, processes or services which compete with
any product, process or service which


<PAGE>



Corporation is  researching,  developing,  making or selling at the time of such
termination  whether his  involvement  shall be as an owner  (except for passive
ownership of up to five percent (5%) of the  securities of a company),  officer,
director, employee,  consultant,  partner or agent; the parties acknowledge that
Employee may be employed by an educational institution or the Federal Government
or any of its agencies and may engage in any  Permitted  Relationship  following
termination of the Term of Employment.

         16.  Notices.  Notices and other  communications  hereunder shall be in
writing and shall be delivered  personally or sent by air courier or first class
certified or registered  mail,  return  receipt  requested and postage  prepaid,
addressed as follows;

If to the Employee:        William A. Haseltine, Ph.D.
                           3053 P Street, NW
                           Washington, DC  20007

If to the Corporation:     Human Genome Sciences, Inc.
                           9410 Key West Avenue
                           Rockville, Maryland 20850

All notices and other  communications  given to any party  hereto in  accordance
with the provision of this  Agreement  shall be deemed to have been given to the
date of delivery if  personally  delivered;  on the  business day after the date
when sent if sent by air courier;  and on the third  business day after the date
when sent if sent by mail,  in each case  addressed to such party as provided in
this Section or in  accordance  with the latest  unrevoked  direction  from such
party.

         17. Headings.  The section headings contained in this Agreement are for
reference  purposes  only  and  shall  not  affect  in any  way the  meaning  or
interpretation of this Agreement.

         18.  Assignment.  This  agreement  is  personal  in its  nature and the
parties hereto shall not,  without the consent of the other,  assign or transfer
this Agreement or any rights or obligations hereunder;  provided,  however, that
the  provisions  hereof  shall inure to the benefit of, and be binding upon each
successor of the Corporation, whether by merger, consolidation,  transfer of all
or   substantially   all  assets,   or   otherwise   and  the  heirs  and  legal
representatives of the employee.


<PAGE>




         IN WITNESS WHEREOF, the parties have duly executed this Agreement as of
the date first above written.


         Corporation:                       HUMAN GENOME SCIENCES, INC.

                                            By: /s/ Donald D. Johnston
                                               --------------------------------
                                            Title: Chairman, Comp. Committee
                                                  -----------------------------
                                            By: /s/ Melvin D. Booth
                                               --------------------------------
                                            Title: President & COO
                                                  -----------------------------

         Employee:                          /s/ William A. Haseltine, Ph.D.
                                            ------------------------------------
                                             William A. Haseltine, Ph.D.



                                                                   Exhibit 23.1





               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS



We consent to the incorporation by reference in the Registration Statement (Form
S-8 No.  33-79022)  pertaining  to the 1993  Incentive and  Non-Qualified  Stock
Option Plan of Human  Genome  Sciences,  Inc. of our report  dated  February 14,
1997, with respect to the financial  statements of Human Genome  Sciences,  Inc.
included in the Form 10-K for the year ended December 31, 1996.



                                                           /s/ Ernst & Young LLP

Vienna, Virginia
March 28, 1997


<PAGE>


                                                                   Exhibit 23.1


               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS



We consent to the incorporation by reference in the Registration Statement (Form
S-8 No.  33-79020)  pertaining  to the 1994 Stock  Option  Plan of Human  Genome
Sciences,  Inc. of our report  dated  February  14,  1997,  with  respect to the
financial  statements of Human Genome Sciences,  Inc.  included in the Form 10-K
for the year ended December 31, 1996.



                                                           /s/ Ernst & Young LLP

Vienna, Virginia
March 28, 1997



                                                                   Exhibit 23.2




               CONSENT OF INDEPENDENT AUDITORS



We consent to incorporation by reference in the Registration  Statements on Form
S-8 (No.  33-79020 and  33-79022) of our report dated  February 14, 1995, on the
financial statements of Human Genome Sciences,  Inc. for the year ended December
31, 1994 included in the 1996 Annual Report on Form 10-K.



                                           /s/ Richard A. Eisner & Company, LLP

New York, New York
March 28, 1997






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