HUMAN GENOME SCIENCES INC
10-K, 1998-03-31
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, 1997 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 February
28, 1998 was 22,361,639.

As of February 28, 1998, 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 $ 576,000,000.*

                       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  8,805,932  shares of common  stock  deemed to be held by officers and
directors,  and stockholders  whose ownership exceeds five percent of the shares
outstanding at February 28, 1998.  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  significantly  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,"  as well as those
discussed elsewhere in this Annual Report on Form 10-K.

GENERAL

     Human  Genome  Sciences,  Inc.  (the  "Company" or "HGS") 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 a very large collection of 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 28, 1998, the
Company has isolated and  characterized  several thousand  full-length genes and
expressed and purified more than 200 potential therapeutic proteins. The Company
is currently  developing  two  proteins,  MPIF-1 and KGF-2,  in phase I clinical
studies  and  evaluating  a number of  additional  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  is  using  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   increases  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 has five collaboration  partners in the area of therapeutic and
diagnostic  products  based on its human gene  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.  In July 1997, the Company entered into another  amendment to the SB
Collaboration   Agreement  to  streamline   the  procedures  for  outlicense  of
diagnostic  products by SmithKline  Beecham and to permit the Company to develop
and market diagnostic tests to support its own therapeutic products.

     In June and July 1996,  the Company and  SmithKline  Beecham  entered  into
collaboration  agreements (the "Additional  Collaboration  Partner  Agreements")
with Schering  Corporation and Schering Plough,  Ltd.  (collectively,  "Schering
Plough"),  Synthelabo  S.A.  ("Synthelabo")  and Merck KGaA  (collectively,  the
"Additional  Collaboration  Partners").   Under  the  terms  of  the  Additional
Collaboration Partner Agreements, $87.5 million of license and research payments
is payable to the  Company  over five  years,  of which  $34.5  million has been
received to date.  In

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<PAGE>
addition, the Additional  Collaboration Partner Agreements provide for milestone
and  royalty  payments  with  respect  to each  product  developed  under  these
agreements.  In exchange, the Additional 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;  and corn  genomics.  Pursuant to the terms of such
collaboration  agreements, an aggregate of $29.1 million of license and research
payments is payable to the Company over five years,  of which $21.1  million has
been received to date.

     The Company also has entered into three gene therapy  agreements,  one with
Schering Plough as part of the Additional Collaboration Partner Agreements,  and
two with early stage gene therapy companies,  Vascular Genetics Inc. ("VGI") and
Transgene S.A.  ("Transgene").  The Company has received  equity in VGI and will
receive equity in Transgene in connection  with granting access to certain genes
in its database. In addition, the Company will receive milestone payments and/or
royalties.  The  Company  also  has  certain  co-marketing  rights  to  products
developed under the Transgene agreement.

     The Company also formed during its early  development a collaboration  with
The Institute of Genomic Research ("TIGR").  Under the collaboration  agreement,
the Company  agreed to provide  TIGR with  funding  totaling  $85 million over a
ten-year period ending  September  2002. In return,  the Company was entitled to
exclusive  intellectual  property rights to TIGR's  research.  In June 1997, the
Company  and  TIGR  reached  an  agreement  for  the  early  conclusion  of  the
collaboration,  which relieved the Company of all remaining funding obligations,
totalling  approximately $38 million.  In exchange,  the Company will forego all
intellectual  property rights for future work performed at TIGR, but retains all
intellectual property rights for work performed up to June 1997.

     The  Company   vigorously  pursues  patents  to  protect  its  intellectual
property.  As of February 28, 1998,  the Company has twenty issued U.S.  patents
covering  full-length  genes and has filed  U.S.  patent  applications  covering
substantially  more than 500 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 on a substantial number
of expressed  sequence  tags  ("ESTs")  that  represent  its large  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 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
                                       3
<PAGE>

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 more than 700 libraries reflect the relative abundance of
the various mRNAs  expressed in each tissue.  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 represents the best method for rapid gene discovery.

     The Company's gene  sequencing  efforts now focus  principally on comparing
genes expressed in normal, abnormal, and 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 also uses its  computer  system 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 are also available to scientists
at  SmithKline  Beecham,  Takeda,  Schering  Plough,  Synthelabo  and Merck KGaA
through  bioinformatics  systems created by the Company and SmithKline  Beecham.
See " -- Collaborative Arrangements."

     The  Company  believes  that its  proprietary  bioinformatics  system is an
important  asset for the  identification  and  creation  of  gene-based  product
opportunities. The Company's bioinformatics system has several capabilities 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, the 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,  the study of the effects of purified proteins
in small laboratory animals, and the initiation of human clinical trials.

     As of February  28,  1998,  the Company has  isolated  and fully  sequenced
several hundred full-length cDNAs,  purified more than 200 potential therapeutic
proteins  and  mapped  more  than 250  full-length  cDNAs  to their  chromosomal
locations.



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<PAGE>

RESEARCH AND DEVELOPMENT

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

     Gene Discovery  Division.  The Gene Discovery  Division is responsible  for
preparing   biological  samples,   extracting  and  amplifying  DNA,  performing
sequencing reactions,  managing production information and monitoring sequencing
quality.  The division manages the operation of 58 automated sequencing machines
along with a variety of laboratory  robots and other  instruments.  The division
has developed  technologies that streamline HGS' efforts to fully sequence genes
of interest in a high-throughput fashion.

     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 several
thousand  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.

     Microbiology   Division.  The  Microbiology  Division  is  responsible  for
development of microbial gene sequence  information and biological reagents that
support  HGS'  and  collaboration  anti-infective  efforts.  For  the  Company's


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microbial gene sequencing projects,  the division is responsible for preparation
and analysis of the microbial genome database.  These efforts include  obtaining
biological samples and preparation of the microbial genome libraries.  The group
has been involved in the sequencing of several  important  microbial  pathogens,
including  Streptococcus  pneumoniae,  Staphylococcus  aureus  and  Enterococcus
faecalis.  The division also supports internal and collaborative efforts focused
on generation of anti-microbial vaccine and immunotherapeutic products.

     Bioinformatics  Division.  The Company's  Bioinformatics  Division develops
systems for  high-volume  data capture and analysis to support HGS' research and
collaborative  efforts.  The division  applies  advanced  sequence data analysis
techniques  to  identify  candidate  genes  for  biological  screening  and drug
development.  Bioinformatics  manages  database systems for tracking samples and
reagents  during  experimental  procedures  and  sample  storage.  The  division
supports collaborative  relationships with the delivery of software,  databases,
training and support.  The division  also is  implementing  systems for clinical
trial data management and analysis, preparation of drug applications and process
control of manufacturing operations.

     Protein  Development  Division.  The  purpose  of the  Protein  Development
Division  is to provide  proteins  in a form  suitable  for in vitro and in vivo
testing. The Protein Development  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  Development
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  also  oversees  the  contract
production of cGMP materials by third parties for preclinical  qualification and
Phase I clinical  studies and the  construction  and  operation of a pilot scale
production  and  process  development  facility,  which will be leased  from the
Maryland Economic Development Corporation ("MEDCO").

     Through  February 28, 1998, the Company has produced and purified more than
200 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  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.

     High-Throughput  Screening Division. The High-Throughput Screening Division
was established in early 1998. This group is responsible for the development and
validation  of  high-throughput  screens to access the activity of the Company's
therapeutic protein candidates. This division is also responsible for generation
of cell-based  supernatants that currently represent several thousand individual
genes encoding potential secreted proteins. The High-Throughput  Screening group
works  closely  with  the  Gene  Discovery  and   Bioinformatics   divisions  in
development   of   laboratory   information   management   systems   useful  for
instrumentation control and analysis of test results.

     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.

     Medical and  Regulatory  Affairs  Divisions.  The  Medical  and  Regulatory
Affairs  Divisions  manage all  activities  necessary  for the  preparation  and
submission  of  regulatory  documentation  including  Investigational  New  Drug
Applications (INDs), Biologics License Applications,  and New Drug Applications.
The divisions are  responsible  for  developing  and  implementing  clinical and
regulatory  strategies that will ensure  submissions meet U.S. and international
regulatory  requirements  to  initiate  clinical  trials  and  obtain  marketing
approvals for products developed by the Company.

     The Quality Assurance (QA) staff,  within Regulatory Affairs, is supporting
the establishment of current good manufacturing practices (GMPs) for HGS' leased
pilot product manufacturing facility. The QA staff provides guidance and assists
in creation and implementation of standard operating procedures (SOPs),  assures
GMP  training for  facility  employees,  and  maintains  documentation  of these
activities. QA participates in GMP audits of contract vendors.

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<PAGE>

     INDs are currently active for two therapeutic protein product candidates --
MPIF-1 and KGF-2.  Leading physicians and investigators have been identified and
consulted for possible new drug  indications  and for optimizing  clinical trial
designs related to investigating  prevention of  chemotherapy-induced  damage to
myeloid  precursors,  treatment of surgical and dermal  wounds,  and  mucositis.
Clinical  investigators  have been  selected  from  this  group to  conduct  the
clinical  trials  sponsored by HGS. The data from these  studies will be entered
into an  electronic  database  and  analyzed  by HGS  medical,  regulatory,  and
statistical  staffs.  Formal reports of clinical and non-clinical data then will
be submitted to the FDA. If the safety and efficacy of the investigational  drug
for the  specified  indication  are  demonstrated  by clinical  trial data,  the
Company intends to submit a biologics license or new drug application to the FDA
for marketing approval.

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 and clinical development
studies  on a  number  of  potential  therapeutic  proteins,  including  Myeloid
Progenitor  Inhibitory Factor-1 (MPIF-1),  Keratinocyte Growth Factor-2 (KGF-2),
and Vascular Endothelial Growth Factor -2 (VEGF-2).

     MPIF-1.  MPIF-1 is a member of the chemokine family.  The Company has shown
that MPIF-1 in in vitro and in vivo  studies  inhibits 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.  An Investigational  New Drug application for MPIF-1 was submitted
to the FDA during November of 1997.  Clinical trials were initiated in the first
quarter of 1998.

     KGF-2. KGF-2 is a member of the Fibroblast Growth Factor  superfamily.  The
Company  has  shown  in in vivo  tests  that  KGF-2  stimulates  the  growth  of
epithelial  cells. The protein has 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.  An Investigational New Drug application for KGF-2 was submitted to the
FDA during December of 1997. Clinical trials were initiated in the first quarter
of 1998.

     VEGF-2.  VEGF-2  is a member of the  vascular  endothelial/platelet-derived
growth factor superfamily. The Company has shown in in vitro studies that VEGF-2
promotes the growth of certain subsets of vascular endothelial cells. In in vivo
animal  models  performed in  collaboration  with Dr.  Jeffrey  Isner at the St.
Elizabeth's Medical School,  VEGF-2 protein and DNA encoding the VEGF-2 gene had
been shown to reduce the  severity of  ischemia  in a rabbit hind limb  ischemia
model.

     As a result of the SB  Amendment,  in June 1996,  the Company  obtained the
right to designate a limited number of therapeutic protein candidates at any one
time for exclusive  development and  commercialization by the Company,  with the
right  to add  additional  proteins  as  products  enter  clinical  trials,  are
outlicensed  or dropped.  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 proteins for
proteins (i) that have been licensed to third parties under procedures set forth
in the SB Amendment,  (ii) that are the subject of clinical  trials or (iii) the
rights 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 and clinical  testing.  Accordingly,  the results of
testing  to date may not be  indicative  of  results  that will be  obtained  in
further  preclinical  trials or in clinical  trials,  as applicable.  As further
results of 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,  or  that  any  product  can  be  successfully
commercialized.

                                       7
<PAGE>

     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 Diagnostic Amendment.

     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
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.

     The Company,  either alone or in  collaboration  with TIGR,  has  completed
sequencing pathogenicity islands of Escherichia coli and the majority of the DNA
comprising   the  genome  of  the   bacteria  of  the   Staphylococcus   aureus,
Streptococcus pneumoniae,  Enterococcus faecalis,  Helicobacter pylori, Borrelia
burgdorferi,  Haemophilus  influenzae,  Mycoplasma  genitalium and Methanococcus
jannaschii.  The  Company has  entered  into  agreements  with  MedImmune,  Inc.
("MedImmune"),  Hoffmann-La Roche Inc.  ("Roche") and Pharmacia & Upjohn Company
("Pharmacia")  to  create   vaccines,   immunotherapeutic   products,   and  new
anti-infectives and antibiotics based on the genomes of many of these organisms.
See "-- Collaborative  Arrangements." Patent applications have been filed by the
Company on these genomes.

     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.  The  Company  has entered  into  agreements  with
Schering Plough,  Vascular Genetics Inc., and Transgene S.A.,  granting them the
right  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

                                       8
<PAGE>


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.

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 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 ("Additional  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 the designating  entity is the first among the Company,  SmithKline Beecham
and the  Additional  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  protein  candidates for its exclusive
development  and   commercialization   at  any  one  time.  Subject  to  certain
limitations,  the Company may substitute  additional proteins for any of the six
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  or (iii) the  rights to which  have been
surrendered by the Company.  SmithKline  Beecham's  right to select  therapeutic
protein  candidates  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  Additional  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 an
Additional  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 Additional  Collaboration  Partner  Agreements,  and that the Company
will receive all royalties and research  support  payments under such Additional
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
Additional  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 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

                                       9
<PAGE>

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
Additional  Collaboration  Partners  will  retain  rights  granted to them under
Additional 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 comprised of representatives of SmithKline Beecham and the Company.

     In July 1997, the SB  Collaboration  Agreements  were further  amended with
respect  to  the  field  of  human  diagnostic   products  (the  "SB  Diagnostic
Amendment").   The  SB  Diagnostic  Amendment  streamlined  the  procedures  for
outlicense by SmithKline Beecham of diagnostic  products based on HGS technology
and specified a royalty on diagnostic products sold by SmithKline Beecham or its
licensees. The agreement also permits HGS to develop and market diagnostic tests
that support its own therapeutic  products, if SmithKline Beecham is not already
developing and marketing such a diagnostic  test. The agreement  provides for an
initial  research term that continues  through June 2001, and may be extended by
SmithKline  Beecham for up to five additional  years by making certain  payments
and provided that the SB Amendment agreement is also extended for a commensurate
period of time.

     Other Collaboration  Agreements in the SB Field. In June and July 1996, the
Company and SmithKline Beecham entered into the Additional Collaboration Partner
Agreements  with  Schering  Plough,  Synthelabo,  and  Merck  KGaA.  Each of the
Additional    Collaboration   Partner   Agreements   provides   the   Additional
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 Additional  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
protein  candidates  that can be claimed,  and subject to achievement of certain
research  requirements  prior  to  such  designation.  Each  of  the  Additional
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 Additional Collaboration Partner Agreements
is for  an  initial  research  term  expiring  in  June  2001.  Each  Additional
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 Additional  Collaboration  Partner Agreements without
the  consent  of  SmithKline  Beecham,  Takeda  and  certain  of the  Additional
Collaboration Partners.

     The Company will be entitled to one-half of all license fees and  milestone
payments and to all royalties due from each Additional Collaboration Partner. In
addition,  each  Additional  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.  $34.5 million has been
received by the Company as of February 28, 1998.

     The  Additional   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 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:

                                       10
<PAGE>
     A Collaboration and License Agreement with MedImmune,  entered into in July
     1995  and  amended  in  March  and  December  1997,  with  respect  to  the
     development of drugs based upon certain  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, Helicobacter pylori
     and Borrelia burgdorferi;

     A Research Collaboration Agreement with Pioneer Hi-Bred International, Inc.
     ("Pioneer"),  entered into in January 1996 under which  Pioneer was granted
     certain 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 similar  agreement was entered into in
     1997 with  respect  to the genome of  Enterococcus  faecalis,  a  bacterial
     pathogen which is a major component of hospital-acquired infections;

     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;

     An  agreement  entered  into in  November  1996  with  OraVax  Merieux  Co.
     ("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;

     An  agreement  entered into in November  1997 with a newly formed  company,
     Vascular  Genetics Inc.,  whereby the Company granted to Vascular  Genetics
     (i) an  exclusive  license in the field of gene  therapy for the  Company's
     vascular  endothelial growth factor 2 (VEGF-2) gene, and (ii) an option for
     up to two additional  genes for use as gene therapy drugs to treat vascular
     disease;  in return the Company received 19.9 percent of Vascular Genetics'
     equity and warrants for the purchase of an additional 5.1 percent interest;
     other initial investors included St. Elizabeth's  Medical Center of Boston,
     Inc., CATO Holding Company, and Jeffrey M. Isner, M.D.; and

     A Collaboration and License Agreement with Transgene S.A.,  entered into in
     February 1998,  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  Transgene  was  granted  the right to license  exclusively  up to 10
     genes; the Company obtained a 10 percent interest in Transgene's equity and
     certain   co-development   and  co-marketing   rights;   the  agreement  is
     conditional  on Transgene's  completion of an initial public  offering of a
     specified size and value.

     As of February 28, 1998,  the Company had entered  into  approximately  276
material   transfer   agreements   with  135  academic   institutions   covering
approximately  1,354  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 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 gene
sequencing  and  made  the  sequences  available  to the  Company.  The  Company
subsequently developed its own gene sequencing capability.

     Pursuant to these  agreements,  a Lease Funding  Agreement  entered into in
March 1993 and a subsequent  agreement  entered into in April 1993,  the Company
had 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 December 31, 1997,

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<PAGE>

the Company had paid approximately $48 million pursuant to these agreements. See
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations."

     Under  the  Research  Services  Agreement  and  the  Intellectual  Property
Agreement,  TIGR was  obligated  to  disclose  to the  Company  all  significant
developments  relating to information or inventions  discovered at TIGR, and the
Company owned (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).

     In June 1997,  the Company and TIGR  agreed to an early  conclusion  of the
relationship between the two companies.  Accordingly, the parties terminated the
prior agreements and entered into a new agreement  whereby HGS ceased all future
payments to TIGR in return for relinquishing rights to future work done by TIGR.
The Company  retained  rights to  inventions  and patents  arising out of TIGR's
research prior to June 1997. TIGR agreed not to enter into commercial agreements
for four years on selected therapeutic proteins and associated  diagnostic tests
in  development  by HGS, and further  agreed to share with HGS any proceeds from
all  commercial  arrangements  relating  to  other  human  therapeutic  proteins
completed  prior  to  June  1999.  In  exchange  for  this  limited  non-compete
agreement,  HGS granted to TIGR and its non-commercial  collaborators a research
license  for  its  prior  work.  The  new  agreement  also  eliminated   certain
restrictions  that prevented TIGR from  publishing  sequence  information.  This
agreement relieved HGS of a funding obligation of more than $38 million over the
remaining life of the original agreement.

     The Company  currently has a sequencing and analysis  capacity greater than
that of TIGR.  The Company  believes  that,  while it benefited from the initial
TIGR  agreement,  termination  of the agreement  with TIGR will have no material
impact on its capacity to sequence and analyze human genes.

     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 in April 1997, all Company  sequences
were  removed  from the  database and the  remaining  TIGR  sequences  were made
publicly available without restriction.

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  28,  1998,  the  Company had filed  United  States  patent
applications with respect to substantially more than 500 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 eight infectious
microorganisms  and one non-infectious  microorganism.  As of February 28, 1998,
the Company has twenty issued U.S.  patents  covering  full-length  human genes.
There can be no assurance that the remaining  applications  covering full-length
genes and their  corresponding  proteins  will  result  in the  issuance  of any

                                       12
<PAGE>

patents.  For  example,  the  disclosures  in  these  applications  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 200,000 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  uncertain  position of the PTO, 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, there is uncertainty as to the commercial meaningfulness
of the protection that might be provided by any such patents.

     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 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  (ESTs)  available in publicly
accessible  databases  or sequenced at TIGR.  Such  disclosures  might limit the
scope of claims or make unpatentable subsequent patent applications filed by the
Company  on  full-length  genes.  Moreover,  the  termination  of the Human cDNA
Database  Agreement in April 1997 and the  termination  of the prior  agreements
between  the  Company  and  TIGR  in June  1997  eliminated  limitations  on the
publication of TIGR sequences as of those dates. While the Company believes that
the previous  limitations  on  publication  of  sequences  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  has not and 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
and -- The Human cDNA Database Agreement."

     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.

     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
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

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<PAGE>

in such  litigation,  it could  consume a  substantial  portion of the Company's
resources.

     In  addition,  a small  percentage  of sequences  covered by the  Company's
patent filings were  identified  pursuant to research  funded by grants from the
United States Department of Energy ("DOE").  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. Although TIGR also enters into confidentiality
agreements  with its  employees,  there is an  additional  risk that such  trade
secrets cannot be meaningfully protected.

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 faces  significant  competition in its product  development and
commercialization   efforts,   including  competition  from  pharmaceutical  and
biotechnology firms, including the Company's  collaborators,  many of which have
substantially   greater  research  and  product  development   capabilities  and
financial,  scientific,  marketing  and human  resources  than the  Company.  In
particular,  although the Company  believes that there are  significant  product
development  opportunities  for  both  it and  its  collaborators  based  on the
Company's  gene  database,   competition   exists  among  the  Company  and  its
collaborators to develop and commercialize  products. In addition, the Company's
competitors  may  succeed  in  developing  products  earlier  than the  Company,
obtaining  approvals  from the United  States  Food & Drug  Administration  (the
"FDA") or other  regulatory  agencies  for such  products  more rapidly than the

                                       14
<PAGE>

Company,  or developing  products that are more effective than those proposed to
be developed by the Company.  Similarly, while the Company through royalties and
co-payment   arrangements  will  share  any  success  of  its  collaborators  in
identifying and  commercializing  products,  they face similar  competition from
other  competitors  who may succeed in  developing  products  more  quickly,  or
developing  products  that are more  effective,  than  those  developed  by such
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.

     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
subject to extensive  regulation  by the FDA (CBER) and  comparable  agencies in
other countries.  Currently,  each clinical 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  documents,  with  respect  to the
development and submission 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.  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,  which 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

                                       15
<PAGE>

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 is seeking to develop  products)
are a new  category  of  therapeutics.  Because  this  is a  relatively  new and
expanding area of novel therapeutic interventions,  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 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, in some cases, 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 commercial  marketing of the drug. 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. In the past,
NDAs and BLAs submitted to the FDA have taken, 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.

     The Company currently is conducting  clinical  development  activities with
respect to MPIF-1 and KGF-2. The Company is conducting  preclinical  trials with
respect to other  proteins  and expects to continue to conduct  preclinical  and
clinical  studies with respect to additional  potential  products,  as permitted
under its  collaboration  agreements.  Accordingly,  the Company is beginning to
incur  significant  expenses  with  respect  to  its  preclinical  and  clinical
development  activities.  There  can be no  assurance  that the  preclinical  or
clinical trials will lead to the successful  development of any products for the
Company, and as further studies are conducted, the Company may choose to abandon
particular projects which it might have previously considered promising.

     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.

                                       16
<PAGE>

     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-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
issued  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 or whether  existing laws and regulations  will not adversely affect it
in the future.

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 has


                                       17
<PAGE>

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 Company
will be dependent on this company for its supply of  therapeutic  proteins until
it is able to produce  therapeutic  proteins at its own facility currently under
construction  (see  Item 2:  Properties).  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 experience
in manufacturing  materials suitable for clinical trials or for commercial sale.
Currently,  the Company relies on a third party for production of certain of its
therapeutic proteins for use in pre-clinical and early clinical development. 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 the third party 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.

     During 1997,  the Company  designed and the Maryland  Economic  Development
Corporation ("MEDCO") began construction of a process development and production
facility for the  preparation  of clinical trial  quantities of its  therapeutic
proteins in  compliance  with cGMP  requirements.  The  facility  will  comprise
approximately  80,000  square feet and is located in the Johns  Hopkins  Belward
Research   Campus  near  the  Company's   offices  and  research   laboratories.
Construction is expected to be completed in December 1998.  After  construction,
the facility must be validated and inspected by the FDA to determine  compliance
with  cGMP  requirements.  The  facility  has been  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 and/or validation of the facility could adversely affect the cost and
timing of clinical trials and could delay  submission of products for regulatory
approval.  The Company has entered into a long term lease arrangement with MEDCO
for the  facility.  See  "Management's  Discussion  and  Analysis  of  Financial
Condition and Results of Operations - Liquidity."

     The  Company's  long range plan is to  establish  additional  manufacturing
capabilities to allow it to meet its full 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.

EMPLOYEES

     As of February 28, 1998, the Company had 353 full-time  employees,  of whom
301 were in research and development,  including 63 scientists holding doctorate
degrees.  The Company anticipates hiring  approximately 100 additional employees
during the next  twelve  months.  The  additional  staff is  expected to include
additional  research and development staff,  pilot plant personnel,  and medical
and  regulatory  affairs  staff.  None of the Company's  employees is covered by
collective bargaining agreements and management considers its relations with its
employees to be good.



                                       18
<PAGE>

ITEM 2.  PROPERTIES

     The  Company  currently  leases   approximately   169,000  square  feet  of
laboratory  and office  space in six  buildings  in  Rockville,  Maryland.  This
includes approximately 120,000 square feet of laboratory space and approximately
49,000 square feet of administrative office space. In addition,  the Company has
entered  into a long  term  lease for a process  development  and  manufacturing
facility.  Construction  recently began on the 80,000 square foot facility which
is being  built to the  Company's  specifications  on a site near the  Company's
headquarters  and research and development  laboratories.  When  completed,  the
facility will be used to produce  clinical trial  quantities of its lead product
candidates.

     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.


                                       19
<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.


                                    1997             HIGH              LOW
                           --------------            --------          ---------
                           First Quarter             $ 48              $ 32 1/2

                           Second Quarter              39 1/4            30 3/4

                           Third Quarter               43 1/2            30 1/2

                           Fourth Quarter              45 1/4            38 1/8

                                    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


As of February 28, 1998, there were  approximately  502 holders of record of the
Company's  common stock. No cash dividends have been paid on the common stock to
date.

ITEM 6.  SELECTED FINANCIAL DATA

         The  following  selected  financial  data of the  Company for the years
ended  December  31, 1997,  1996 and 1995,  and as of December 31, 1997 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
years ended  December 31, 1994 and 1993,  and as of December 31, 1995,  1994 and
1993 have been derived from audited  financial  statements not included  herein.
The results of  operations of prior  periods are not  necessarily  indicative of
results that may be expected  for any other  period.  See "ITEM 7.  MANAGEMENT'S
DISCUSSION AND ANALYSIS OF FINANCIAL  CONDITION AND RESULTS OF  OPERATIONS"  and
"ITEM 1. BUSINESS."




                                       20
<PAGE>

<TABLE>
<CAPTION>
                                                                    YEARS ENDED DECEMBER 31,
                                                   1997           1996            1995           1994          1993
                                             ------------------------------ ---------------------------------------
                                                              (IN THOUSANDS, EXCEPT PER SHARE DATA)
 <S>                                             <C>            <C>             <C>            <C>           <C>    
          STATEMENT OF OPERATIONS DATA:
           Revenue-research and
             development collaborative
             contracts....................      $25,605        $ 36,460        $  5,000       $41,065       $22,000
           Costs and expenses:
             Research and development:
                Direct expenditures.......       39,893         30,409           22,904        17,636         7,611
                Payments under research
                  services agreement......        6,247         10,063           10,075         9,662         8,989
                                                --------      --------         --------       -------       -------
             Total research and
                  development.............       46,140         40,472           32,979        27,298        16,600
             General and administrative...       11,113          9,639            8,745         6,840         3,998
                                                -------       --------         --------       -------       -------
           Total cost and expenses........       57,253         50,111           41,724        34,138        20,598
                                                -------       --------         --------       -------       -------
             Income (Loss) from operations      (31,648)       (13,651)         (36,724)        6,927         1,402
           Net interest income                   10,500          6,092            4,005         2,813            390
                                                 -------       ---------        --------       -------      -------
                                                                                                                
           Income (loss) before taxes.....      (21,148)        (7,559)         (32,719)        9,740         1,792
           Provision for (benefit) from
             income taxes.................          245            208           (1,651)        2,436            (2)
                                                -------       --------         --------       -------       --------
           Net income (loss)..............     $(21,393)      $ (7,767)        $(31,068)      $ 7,304       $ 1,794
                                               ========       ========         ========       =======       =======
           Net income (loss) per share....     $  (0.99)(1)   $  (0.42)(1)     $  (1.98)(1)   $  0.47(1)    $  0.15(1)
                                               ========       ========         ========       =======       =======
           Net income (loss) per share
             assuming dilution............    $(0.99)(1)      $  (0.42)(1)     $  (1.98)(1)   $  0.47(1)    $  0.14(1)
                                              ==========      ========         ========       =======       =======

<CAPTION>
                                                                     AS OF DECEMBER 31,
                                                 ---------------------------------------------------------
                                                   1997          1996         1995         1994       1993
                                                 --------     ----------   ----------   ---------- -------
                                                                        (IN THOUSANDS)
<S>                                              <C>           <C>          <C>         <C>        <C>      
                BALANCE SHEET DATA:
                Cash, cash equivalents and
                  investments................    $205,212      $ 116,116    $ 105,462   $ 76,002   $  69,478
                Total assets.................     236,232        140,117      126,963     95,543      82,450
                Total debt and capital leases,
                  less current portions......       2,224          2,954        4,332      5,346      1,338
                Retained earnings (deficit)..     (55,522)       (34,129)     (26,362)     4,706     (2,598)
                Total stockholders' equity...     223,254        128,521      115,606     83,785     75,929

</TABLE>


- --------------------------------------------------------------------------------
(1) The net loss per share  amounts  prior to fiscal 1998 have been  restated as
required to comply with  Statement of Financial  Accounting  Standards  No. 128,
Earnings Per Share. For further  discussion of net loss per share and the impact
of Statement No. 128, see Notes B and O of the notes to the Company's  financial
statements included herein.


                                       21
<PAGE>


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

OVERVIEW

     The  Company  initially  focused  its  efforts  on  developing  proprietary
processes for automating the gene discovery process,  establishing collaborative
arrangements,  and  establishing  and  expanding its  pre-clinical  research and
development  capabilities.  The Company's  activities  are currently  focused on
research and  development of novel,  proprietary  pharmaceutical  and diagnostic
products  based on the discovery  and  understanding  of the medical  utility of
genes.

     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 next several years. Through December 31, 1997,
the  Company had  received  (i) $70 million in revenue and $55 million in equity
payments  pursuant to the SB  Collaboration  Agreements,  (ii) payments from the
Additional  Collaboration  Partners of $34.0  million and (iii) an  aggregate of
$23.1  million from other  collaborators,  including  $11.0 million from Pioneer
Hi-Bred International,  Inc. ("Pioneer"), $3.0 million from F. Hoffmann-La Roche
("Roche"),  $6.0 million from  Pharmacia & Upjohn  Company  ("Pharmacia"),  $1.1
million  from  OraVax  Merieux  Co. and  Merieux  OraVax  S.N.C.  (collectively,
"OraVax") and $2.0 million from Schering Plough (in addition to certain payments
received from Schering Plough pursuant to the Additional  Collaboration  Partner
Agreements). Pursuant to the terms of such collaboration agreements, the Company
expects to receive  license fees and research  payments of $63.5  million in the
aggregate   over  the  next  three  years.   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 various  collaboration
agreements,  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.

     On March 2, 1998,  the Company  signed a ten year  agreement with Transgene
S.A.  ("Transgene"),  based in  Strasbourg,  France,  to  develop  gene  therapy
products.  Under the terms and conditions of the agreement,  Transgene will have
the right to exclusively license, and sublicense, up to 10 genes and to develop,
manufacture and commercialize any resulting gene therapy products worldwide. The
two  companies may also choose to co-develop  and co-market the  identified  new
gene therapy products, and, in such case,  commercialization rights will be held
by the Company for North  America and by Transgene for Europe and will be shared
equally  for the rest of the  world's  markets.  Transgene  will pay an  initial
licensing  fee and  research  funding  in an  amount  equal to the  proceeds  to
Transgene from the Company's purchase of a 10% interest in Transgene.  The value
of the 10% interest based on the anticipated close of Transgene's Initial Public
Offering  (currently in process) would be approximately $25 million.  Additional
payments to the Company are dependent  upon the number of genes which  Transgene
licenses  and the  accomplishment  of certain  milestones.  Royalties  on future
product sales and partnering  revenues will be paid by Transgene to the Company.
On  co-marketed  products,   the  Company  and  Transgene  will  pay  reciprocal
royalties.

RESULTS OF OPERATIONS

YEARS ENDED DECEMBER 31, 1997 AND 1996

     Revenues.  The Company had revenues of $25.6  million and $36.5 million for
the years ended December 31, 1997 and December 31, 1996, respectively.  The 1997
revenue  consisted of $4.1 million in license  fees and research  payments  from
collaborations  with Pioneer and Roche, $12.0 million in annual license fees and
additional  payments from  collaborations  with Schering  Plough and Synthelabo,
$5.5  million in annual  license  fees and  additional  payments  pursuant  to a
collaboration  agreement  with  Merck,  and $4.0  million in  license  fees from
collaborations with Pharmacia,  MedImmune and OraVax. 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, $12.0 million in
annual license fees and additional  payments from  collaborations  with Schering
Plough and  Synthelabo,  $5.5  million  in annual  license  fees and  additional
payments  pursuant to a collaboration  agreement with Merck, and $2.1 million in
license fees from collaborations with Pharmacia, MedImmune and OraVax.



                                       22
<PAGE>

     Expenses.  Research and development expenses increased to $46.1 million for
the year ended  December 31, 1997 from $40.5 million for the year ended December
31, 1996. The increase  resulted  primarily from  significant  expansions in the
Company's cell biology,  protein  expression and pharmacology  departments,  the
production of clinical trial  quantities of the Company's  first two therapeutic
product  candidates and the formation of a medical affairs  department to manage
clinical  trials.  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 $11.1 million for the year
ended  December 31, 1997 from $9.6 million for the year ended December 31, 1996.
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, 1997
compared to the year ended December 31, 1996 due to higher cash balances.

     Net Income (Loss).  The Company  recorded a net loss of $21.4  million,  or
$0.99 per share,  for the year ended December 31, 1997 compared to a net loss of
$7.8  million,  or $0.42 per share,  for the year ended  December 31, 1996.  The
difference in results for the year ended December 31, 1997 and 1996 is primarily
due to the lower  collaboration  partner payments during the year ended December
31, 1997 and higher  expenses,  which were partially  offset by higher  interest
income.

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 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  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.

     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.  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.

LIQUIDITY AND CAPITAL RESOURCES

     The Company had working  capital of $196.9  million at December 31, 1997 as
compared to $110.8 million at December 31, 1996. The increase  resulted from the
sale in March  1997 of  3,192,750  shares of common  stock at a public  offering
price of $37.00 per share for which the Company  received net proceeds of $112.0
million,  which was partially  offset by the net loss generated during the year,
capital expenditures, and payments on capitalized leases.

     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.
At December 31, 1997, the Company had outstanding  commitments for  construction
and equipment purchases totaling approximately $353,000.



                                       23
<PAGE>

     The Company expects that its existing funds, interest income, and committed
license fees and research  payments from the Additional  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
(including its preclinical and clinical product development activities),  paper,
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.

     The  Company  entered  into a 20 year lease for a process  development  and
production  facility  being built to the Company's  specifications.  Annual base
rent in the amount of $2.2  million is  expected to begin  January 1, 1999,  the
anticipated completion date of the facility.

     As of December 31, 1997, the Company had net operating  loss  carryforwards
for federal income tax purposes of  approximately  $51 million which expire,  if
unused,  by  the  year  2012.  The  Company  also  has  available  research  and
development tax credit carryforwards of approximately $6.8 million, the majority
of which will expire, if unused, by the year 2012.

     The Company's funds are currently  invested in U.S. Treasury and government
agency obligations and high grade corporate debt securities and commercial paper
investment-grade   commercial  paper  and  interest-bearing   securities.   Such
investments  reflect 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.

     Recently,  national  attention  has focused on the  potential  problems and
costs  resulting  from computer  programs  being written using two digits rather
than four to  define  the  applicable  year.  Any  computer  programs  that have
date-sensitive  software may recognize a date using "00" as the year 1900 rather
than the year 2000.  This could  result in a system  failure or  miscalculations
causing  disruptions of operations,  including,  among other things, a temporary
inability  to  process  transactions,  or  engage  in  similar  normal  business
activities.  While the Company believes that its internal software  applications
are Year 2000 compliant,  there can be no assurance until the year 2000 that all
systems will  function  adequately.  Further,  if the software  applications  of
others on whose services the Company depends are not Year 2000  compliant,  such
noncompliance could have a material adverse effect on the Company.

RECENT PRONOUNCEMENTS

     In June 1997, the Financial  Accounting Standards Board issued Statement of
Financial  Accounting  Standards No. 130 ("SFAS 130"),  "Comprehensive  Income,"
which is required to be adopted in the year ended December 31, 1998 consolidated
financial statements. SFAS 130 requires that an enterprise (a) classify items of
comprehensive income by their nature in the financial statements and (b) display
the accumulated balance of other  comprehensive  income separately from retained
earnings  and  additional  paid-in  capital in the  Statement  of  Stockholders'
Equity.  The Company  does not expect the adoption of SFAS 130 to be material to
its financial condition and results of operations.

     In June 1997, the Financial  Accounting Standards Board issued Statement of
Financial Accounts  Standards No. 131 ("SFAS 13l"),  "Disclosures about Segments
of an Enterprise  and Related  Information,"  which is required to be adopted in
the year ended December 31, 1998 consolidated financial statements. SFAS changes
the  way  public  companies  report  segment  information  in  annual  financial
statements  and  also  requires  those  companies  to  report  selected  segment
information in interim  financial  reports to stockholders.  The disclosures for
segment information in the consolidated  financial statements is not expected to
be material to its financial condition and results of operations.



                                       24
<PAGE>

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 payments,  and other risks and
uncertainties  detailed  elsewhere  herein  and  from to  time in the  Company's
filings with the Securities and Exchange Commission.

ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

     The information  required by this item are set forth here in on pages F-1 -
F-20.

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

     None.




                                       25
<PAGE>


                                    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 "1998 Proxy Statement").

ITEM 11. EXECUTIVE COMPENSATION

     The Company  incorporates  herein by reference the  information  concerning
executive compensation contained in the 1998 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
1998 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 1998 Proxy
Statement.




                                       26
<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>                                                                          <C>
               Report of Ernst & Young LLP, Independent Auditors........................    F-2
               
               Balance Sheets at December 31, 1997 and 1996.............................    F-3

               Statements of Operations for the years ended December 31, 1997, 1996 and    
                   1995.................................................................    F-4

               Statements of Stockholders' Equity for the years ended December 31,
                   1997, 1996 and 1995..................................................    F-5

               Statements of Cash Flows for the years ended December 31, 1997, 1996 and     
                   1995.................................................................    F-6

               Notes to Financial Statements............................................    F-7

</TABLE>

(2)     Financial Statement Schedules

        Financial statement schedules are omitted because they are not required.

(3)     Exhibits
Exhibit No.
- -----------

  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).
                                                                                
  3.3    Certificate  of  Amendment  of  the  Certificate  of  Incorporation  of
         Registrant
                                                                                
  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).

                                       27
<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"). (Filed
         as Exhibit 10.15 to the  Registrants  Form 10-K filed March 31,1996 and
         incorporated herein by reference).

                                       28
<PAGE>
 10.21*+ License  Agreement  between  Registrant and F. Hoffmann-La  Roche, Ltd.
         ("Roche").  (Filed as Exhibit 10.16 to the Registrants  Form 10-K filed
         March 31,1996 and incorporated herein 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).
                                                                                
 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).
                 
                                       29
<PAGE>
 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. (Filed as Exhibit 10.44 to the Registrant's Form 10 K
         for the fiscal year ended December 31, 1996 and incorporated  herein by
         reference).
                                                                                
 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).
                                                                                
 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).
                 


                                       30
<PAGE>
 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).
                                                                                
 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).
                 
                                       31
<PAGE>
 10.64*+ HGS/TIGR  Agreement  dated June 20, 1997 (Filed as Exhibit  10.1 to the
         Registrant's Form 10-Q filed August 14, 1997 and incorporated herein by
         reference).
                                                                                
 10.65*+ Amendment to SmithKline  Beecham  Corporation  and  SmithKline  Beecham
         p.l.c. and Human Genome Sciences,  Inc.  Collaboration  Agreement dated
         July 24, 1997  (Filed as Exhibit  10.2 to the  Registrant's  10-Q filed
         August 14, 1997 and incorporated herein by reference).
                                                                                
 10.66++ Gene Therapy  Collaboration  and License Agreement between Human Genome
         Sciences, Inc. and Transgene S.A., dated February 25, 1998.
                                                                                
 10.67   Lease Agreement between Maryland Economic  Development  Corporation and
         Human Genome Sciences, Inc., dated December 1, 1997.
                                                                                
 23.1    Consents of Ernst & Young LLP, Independent Auditors.
                                                                                
 27      Financial Data Schedule.

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

 *  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.
                                                                                
 ++ Confidentiality  treatment has been requested.  The copy filed as an exhibit
    omits the information subject to the confidentiality request.
                                                                                
                                       32
<PAGE>

b)       Reports on Form 8-K

         The  Company  did not file any  reports  on Form 8-K  during the fourth
quarter of 1997.

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, 1998

     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            March 31, 1998
- --------------------------------------                 Executive Officer (principal executive
William A. Haseltine, Ph.D.                            officer)


/S/Melvin D. Booth                                     President, Chief Operating Officer         March 31, 1998
- -----------------------------------------------        Director
Melvin D. Booth                                 


/S/Craig A. Rosen, Ph.D.                               Senior Vice President, Research and         March 31, 1998
- -----------------------------------------------        Development and Director
Craig A. Rosen, Ph.D.                         


/S/Steven C. Mayer                                     Senior Vice President and                  March 31, 1998
- -----------------------------------------------        Chief Financial Officer(principal
Steven C. Mayer                                        financial and accounting officer)


/S/Robert A. Armitage                                  Director                                   March 31, 1998
- -----------------------------------------------
Robert A. Armitage


/S/James Cavanaugh, Ph.D.                              Director                                   March 31, 1998
- -----------------------------------------------
James Cavanaugh, Ph.D.


/S/Jurgen Drews, M.D.                                  Director                                   March 31, 1998
- -----------------------------------------------
Jurgen Drews, M.D.


/S/Beverly Sills-Greenough                             Director                                  March 31, 1998
- -----------------------------------------------
Beverly Sills-Greenough

</TABLE>

                                       33
<PAGE>

<TABLE>
<CAPTION>

<S>                                                    <C>                                       <C> 
/S/Robert Hormats                                      Director                                  March 31, 1998
- -----------------------------------------------
Robert Hormats


/S/Donald D. Johnston                                  Director                                  March 31, 1998
- -----------------------------------------------
Donald D. Johnston


/S/Max Link, Ph.D.                                     Director                                  March 31, 1998
- -----------------------------------------------
Max Link, Ph.D.


/S/Alan G. Spoon                                       Director                                  March 31, 1998
- -----------------------------------------------
Alan G. Spoon


/S/James Barnes Wyngaarden, M.D.                       Director                                  March 31, 1998
- -----------------------------------------------
James Barnes Wyngaarden, M.D.

</TABLE>



                                       34
<PAGE>

                          INDEX TO FINANCIAL STATEMENTS


                                                                           Page
                                                                         Number
                                                                         ------
Report of Ernst & Young LLP, Independent Auditors........................ F-2

Balance Sheets at December 31, 1997 and 1996............................. F-3

Statements of Operations for the years ended 
 December 31, 1997, 1996 and 1995........................................ F-4

Statements of Stockholders' Equity for the years ended

December 31, 1997, 1996 and 1995......................................... F-5

Statements of Cash Flows for the years ended 
 December 31, 1997, 1996 and 1995........................................ F-6

Notes to Financial Statements............................................ F-7



                                      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,  1997 and 1996 and the related  statements  of  operations,
stockholders'  equity,  and cash flows for each of the three years in the period
ended December 31, 1997. 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.

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, 1997 and 1996 and the results of its  operations and its cash flows
for each of the three years in the period ended December 31, 1997, in conformity
with generally accepted accounting principles.

                                                           /s/ Ernst & Young LLP

Vienna, Virginia
February 23, 1998


                                      F-2

<PAGE>


                           HUMAN GENOME SCIENCES, INC.

                                 BALANCE SHEETS
<TABLE>
<CAPTION>
                                                                                               December 31,
                                                                                        ---------------------------
                                                                                           1997          1996
                                                                                        ------------ --------------
ASSETS                                                                                  (dollars in thousands, except
- ------                                                                                 for share and per share amounts)
<S>                                                                                     <C>              <C>      
Current assets:
     Cash and cash equivalents.....................................................     $  44,346        $  27,341
     Short-term investments........................................................       160,866           88,775
     Prepaid expenses and other current assets.....................................         2,120            2,935
                                                                                        ------------ --------------
         Total current assets......................................................       207,332          119,051

Property, plant and equipment (net of accumulated depreciation and amortization)...        20,647           18,031
Restricted investments.............................................................         6,582            1,705
Other assets.......................................................................         1,671            1,330
                                                                                        ------------ --------------
         TOTAL.....................................................................      $236,232         $140,117
                                                                                        ============ ==============

LIABILITIES
- -----------

Current liabilities:
     Current portion of long-term debt.............................................     $     444      $      444
     Accounts payable and accrued expenses.........................................         4,656           3,361
     Accrued payroll and related taxes.............................................         2,077           1,120
     Current obligation under capital leases.......................................           223             811
     Deferred revenues.............................................................         3,020           2,537
                                                                                        ------------ --------------
         Total current liabilities.................................................        10,420           8,273
Long-term debt, net of current portion.............................................         2,224           2,668
Obligations under capital leases, net of current portion...........................             0             286
Other liabilities..................................................................           334             369
                                                                                        ------------ --------------
         TOTAL.....................................................................        12,978          11,596

Commitments and other matters......................................................             -               -

STOCKHOLDERS' EQUITY
- ---------------------

Common stock - $.01 par value; shares authorized - 50,000,000; shares issued -
     22,313,504 and 18,784,382 at December 31, 1997 and 1996, respectively.........           223             188

Additional paid-in capital.........................................................       278,626         162,583

Unearned portion of compensatory stock.............................................          (121)             -
Unrealized gain (loss) on investments available for sale...........................            48            (121)
Retained deficit...................................................................       (55,522)        (34,129)
                                                                                        ------------ --------------
         Total stockholders' equity................................................       223,254         128,521
                                                                                        ------------ --------------
         TOTAL.....................................................................      $236,232        $140,117
                                                                                        ============ ==============

</TABLE>

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

                                      F-3


<PAGE>


                           HUMAN GENOME SCIENCES, INC.
                            STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>
                                                                             Year Ended December 31,
                                                                 -------------------------------------------------
                                                                      1997           1996              1995
                                                                 --------------- --------------  ------------------
                                                                     (dollars in thousands, except for share
                                                                              and per share amounts)
<S>                                                                    <C>        <C>                   <C>    
Revenue - research and development collaborative contracts.....  $      25,605   $    36,460     $        5,000

Costs and expenses:
     Research and development:
         Direct expenditures...................................         39,893        30,409             22,904
         Payments under research services agreement............          6,247        10,063             10,075
                                                                 --------------- --------------  -----------------
            Total research and development.....................         46,140        40,472             32,979

General and administrative.....................................         11,113         9,639              8,745
                                                                 --------------- --------------  -----------------

         Total costs and expenses..............................         57,253        50,111             41,724
                                                                 --------------- --------------  -----------------
Income (loss) from operations..................................        (31,648)      (13,651)           (36,724)

Interest income................................................         10,889         6,462              4,555

Interest expense...............................................           (389)         (370)              (550)
                                                                 --------------- --------------  -----------------
Income (loss) before taxes.....................................        (21,148)       (7,559)           (32,719)

Provision for (benefit) from income taxes:
     Current...................................................            245           208             (1,651)
                                                                 --------------- --------------  -----------------

Net Income (Loss)..............................................  $    (21,393)   $    (7,767)    $      (31,068)
                                                                 =============== ==============  =================

Basic and diluted net income (loss) per share..................  $      (0.99)   $     (0.42)    $        (1.98)
                                                                 =============== ==============  =================

Weighted average shares outstanding basic and diluted..........    21,525,283     18,630,986         15,723,144
                                                                 =============== ==============  =================
</TABLE>



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

                                      F-4


<PAGE>



                           HUMAN GENOME SCIENCES, INC.

                       STATEMENTS OF STOCKHOLDERS' EQUITY

                    (DOLLARS IN THOUSANDS, EXCEPT FOR SHARES)

<TABLE>
<CAPTION>
                                                                                      Unrealized   
                                       Common Stock                   Unearned      Gain (Loss)   
                                  ----------------------              Portion of         on
                                  Number                  Additional  Compensatory   Investments     Retained
                                    Of                     Paid-In     Stock and      Available      Earnings
                                  Shares      Amount       Capital      Warrants       for Sale     (Deficit)     Total
- -------------------------------------------- -----------  ---------- --------------- -------------  ----------- -----------
<S>                              <C>         <C>          <C>         <C>            <C>             <C>        <C>      
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 by lessor        216,330         2           (2)           -               -             -           -
Warrants exercised                    7,499         -            1            -               -             -           1
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
                                   
Exercise of options                 280,340         3        4,173            -               -             -       4,176
Warrants exercised by lessor          5,161         -            -            -               -             -           -
Warrants exercised                   50,871         -           10            -               -             -          10
Issuance of common stock
 pursuant to public
 offering (net of expenses)       3,192,750        32      111,713            -               -             -     111,745
Compensatory stock options
issued                                    -         -          147         (147)              -            -           -
Compensatory stock and warrants 
earned                                    -         -            -           26               -            -          26
Net loss                                  -         -            -            -               -      (21,393)    (21,393)
Unrealized gain on investments            -         -            -            -             169            -         169
                                 ----------- -----------  ---------- --------------- -------------  ----------- -----------
Balance - December 31, 1997      22,313,504  $    223       $278,626 $     (121)     $       48     $(55,522)   $223,254
                                 =========== ===========  ========== =============== =============  =========== ===========
</TABLE>


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

                                      F-5

<PAGE>

                           HUMAN GENOME SCIENCES, INC.

                            STATEMENTS OF CASH FLOWS
<TABLE>
<CAPTION>
                                                                                     Year Ended December 31,
                                                                                   1997        1996       1995
                                                                                 ---------------------------------
                                                                                      (dollars in thousands)
CASH FLOWS FROM OPERATING ACTIVITIES:
<S>                                                                              <C>        <C>         <C>      
    Net income (loss)..........................................................  $ (21,393) $  (7,767)  $(31,068)
    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...........     (1,109)      (857)      (251)
        Depreciation and amortization..........................................      6,359      5,858      4,395
        Loss due to disposal and write-down of property, plant and equipment...         50         66        665
        Compensation expense related to stock options and warrants.............         26        885        699
        Changes in operating assets and liabilities:
           Prepaid expenses and other current assets...........................        738       (718)      (699)
           Funds available - facility fund.....................................          -          -        (52)
           Other assets........................................................       (341)         3         12
           Accounts payable and accrued expenses...............................        988      1,376        305
           Accrued payroll and related taxes...................................        957        428        143
           Deferred income.....................................................        483        537      2,000
           Income taxes payable................................................          -          -     (2,134)
           Other liabilities...................................................        (35)        (5)       (26)
                                                                                 ---------- ----------- ----------
           Net cash provided by (used in) operating activities.................    (13,277)      (194)   (26,011)
                                                                                 ---------- ----------- ----------
CASH FLOWS FROM INVESTING ACTIVITIES:
    Capital expenditures - property, plant and equipment.......................     (8,717)     (8,306)   (7,697)
    Purchase of investments and marketable securities..........................   (205,572)   (182,030)  (98,717)
    Proceeds from sale and maturities of investments
      and marketable securities................................................    134,833     159,499    73,552
                                                                                 ---------- ----------- ----------
           Net cash provided by (used in) investing activities.................    (79,456)    (30,837)  (32,862)
                                                                                 ---------- ----------- ----------
CASH FLOWS FROM FINANCING ACTIVITIES:
    Proceeds from long-term debt...............................................          -          -      2,353
    Repayment of long-term debt................................................       (444)       (444)     (444)
    Restricted cash............................................................     (4,877)        295         -
    Payments on capital lease obligations......................................       (874)     (1,297)   (1,139)
    Proceeds from issuance of common stock (net of expenses)...................    115,933      19,965    61,929
                                                                                 ---------- ----------- ----------
           Net cash provided by (used in) financing activities.................    109,738      18,519    62,699
                                                                                 ---------- ----------- ----------
NET  INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS..........................     17,005     (12,512)    3,826
Cash and cash equivalents - beginning of year..................................     27,341      39,853    36,027
                                                                                 ---------- ----------- ----------
CASH AND CASH EQUIVALENTS - END OF YEAR........................................  $  44,346   $  27,341  $ 39,853
                                                                                 ==========  ========== ==========

Supplemental  disclosures  of cash flow  information:
   Cash paid during the year for:
        Interest...............................................................  $     240   $     199  $    233
        Income taxes...........................................................        245         208       508

</TABLE>

See Note G for noncash exercise of warrants.


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

                                      F-6

<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 revenues are currently derived from license fees and research payments
under collaboration  agreements.  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.

    Cash equivalents and Short-Term Investments

The Company considers all highly liquid investment  instruments purchased with a
maturity of three  months or less to be cash  equivalents.  On December 31, 1997
and 1996, the Company had purchased $15,171,000 and $6,840,054, respectively, of
U.S.  Government  securities  under  agreements to resell on January 1, 1998 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.

The  Company   classifies  its  short-term   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.

During 1997,  the Company  instructed  its cash  portfolio  managers to hold all
securities as  available-for-sale  to be available for current  operations.  For
comparative  purposes,  the  Company  has  reclassed  long-term  investments  to
short-term investments.

    Investment Risk

The Company has invested its cash in obligations  of the U.S.  Government and in
high grade  corporate  debt  securities  and  commercial  paper.  The  Company's
investment policy limits  investments to certain types of instruments  issued by
institutions  with investment grade credit ratings,  and places  restrictions on
maturities and concentration by type and issuer.

    Investments

All  investments  in which the Company  has the ability to exercise  significant
influence over the investee,  but less than a controlling  voting interest,  are
accounted for under the equity method of accounting.  Under the equity method of
accounting,  the  Company's  share of the  investee's  earnings  or  losses  are
included in operations,  to the extent the Company has an investment recorded as
an asset plus the amount of any continuing commitment to fund the investee.

                                      F-7

<PAGE>

                           HUMAN GENOME SCIENCES, INC.

                          NOTES TO FINANCIAL STATEMENTS

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

    Depreciation and amortization

Depreciation and amortization are 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.

    Impairment of Long-Lived Assets

Periodically,  management  determines  whether any property and equipment or any
other assets have been impaired  based on the criteria  established in Statement
of Financial  Accounting  Standards No. 121,  "Accounting  for the Impairment of
Long-Lived Assets and Long-Lived Assets to be Disposed Of" ("SFAS No. 121"). The
Company  made no  adjustments  to the carrying  values of the assets  during the
years ended December 31, 1997, 1996, and 1995.

    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
Accounting  Principles  Board  Opinion No. 25,  "Accounting  for Stock Issued to
Employees"  ("APB No. 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 No. 25 in  accounting  for its stock  option  incentive
plans. See Note L to the financial statements for further information.

    Revenue recognition

Nonrefundable license fees, research payments, additional 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.

    Research and development

Research and development costs are charged to expense as incurred.

    Patent costs

Patent application costs are charged to expense as incurred.

    Net income (loss) per share

In 1997,  the Financial  Accounting  Standards  Board issued  Statement No. 128,
"Earnings per Share" ("SFAS No. 128").  SFAS No. 128 replaced the calculation of
primary and fully diluted earnings per share with basic and diluted earnings per
share.  Unlike primary earnings per share, basic earnings per share excludes any
dilutive  effects of  options,  warrants  and  convertible  securities.  Diluted
earnings  per share is very similar to the  previously  reported  fully  diluted
earnings per share.  All net income  (loss)  earnings per share  amounts for all
periods have been presented,  and where appropriate,  restated to conform to the
SFAS No. 128 requirements.


                                      F-8

<PAGE>

                           HUMAN GENOME SCIENCES, INC.

                          NOTES TO FINANCIAL STATEMENTS

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

    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.

    Reclassification

     Certain  reclassifications  have been made to the 1996 financial statements
to conform with the 1997 presentations.

    Recent Pronouncements

In June 1997,  the  Financial  Accounting  Standards  Board issued  Statement of
Financial Accounting Standard No. 130, "Reporting  Comprehensive  Income" ("SFAS
No. 130"),  which is required to be adopted for the Company's  December 31, 1998
financial  statements.  SFAS No. 130 establishes new rules for the reporting and
display  of  comprehensive  income and its  components  in a full set of general
purpose financial statements.  Comprehensive income is the total of net loss and
all  other  nonowner  changes  in  equity.  The  impact  of SFAS No.  130 on the
Company's December 31, 1998 financial condition and results of operations is not
expected to be material.

In June 1997,  the  Financial  Accounting  Standards  Board issued  Statement of
Financial  Accounting  Standard  No.  131,  "Disclosures  about  Segments  of an
Enterprise and Related  Information"  ("SFAS No. 131"),  which is required to be
adopted for the Company's December 31, 1998 financial  statements.  SFAS No. 131
establishes  annual and interim  reporting  standards for a company's  operating
segments and related disclosures about its products, services,  geographic areas
and major  customers.  The impact of SFAS No. 131 on the Company's  December 31,
1998  financial  condition  and  results of  operations  is not  expected  to be
material.

(NOTE C) - INVESTMENTS

Investments,  including accrued interest,  at December 31, 1997 and 1996 were as
follows:

<TABLE>
<CAPTION>
                                          December 31, 1997
                                          -----------------
                                                       Amortized                          Unrealized
                  Available-for-Sale                     Cost           Fair Value       Gain/(Loss)
                  ------------------                 --------------     ----------       -----------
 <S>                                                    <C>               <C>               <C>
 U.S. Treasury and agencies                          $  16,838,000     $  16,836,000     $     (2,000)
 Corporate debt securities                             143,980,000       144,030,000           50,000
                                                     --------------   ---------------    -------------   
                                                      $160,818,000      $160,866,000     $   48,000    
                                                     ==============   ===============    =============   
                                                                          
                                          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 TO FINANCIAL STATEMENTS

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

In June 1997,  the  Company  and TIGR  reached an  agreement  to  terminate  the
Research  Services  Agreement (the "Services  Agreement") dated October 1, 1992,
the  Intellectual  Property  Agreement  dated October 2, 1992, the Lease Funding
Agreement and  Assignment  dated March 2, 1993,  the Agreement of April 19, 1993
related to human cDNA sequencing, and all other agreements entered into any time
prior to the  Termination  Date  between the  Company and TIGR.  Pursuant to the
Termination  Agreement,  the Company  retains  rights in  intellectual  property
arising out of TIGR's research prior to June 2, 1997, but will have no rights to
intellectual  property  resulting  from future  research by TIGR. The Company is
relieved of its  obligation to provide  future  funding  (including all research
funding)  to TIGR,  which  would have  amounted to  approximately  $38  million.
Certain   limitations  on  TIGR's  publication  of  intellectual   property  and
restrictions on TIGR entering into commercial  agreements contained in the prior
agreements were also terminated. However, pursuant to the Termination Agreement,
TIGR has agreed not to enter into commercial  agreements for the next four years
with respect to selected  therapeutic  proteins and associated  diagnostic tests
currently  in  development  by the  Company.  In  addition,  the Company will be
entitled  to be paid a  percentage  of certain  payments  received  by TIGR from
commercial  agreements  relating  to human  therapeutic  proteins  in which TIGR
grants or agrees to grant rights within two years.

(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 was
allocated  to the purchase  price of  1,351,738  shares of common stock with the
balance of $70 million recognized from license fees, option rights and milestone
payments.  Of the $70 million recognized since 1993, $6.9 million was recognized
during the year ended December 31, 1996.

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  $18.1
million.  The  remainder of the payment was  allocated to the  deliverables  and
other data being transferred to SB and recorded by the Company as revenue.

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  development  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 fee  payments  paid by the  Collaboration  Partners and 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 SB Products  based on the  Company's  patents or
technologies  made  by  SB  and  milestone   payments  in  connection  with  the
development of SB Products.

In July 1997,  the  Collaboration  Agreement with SB was amended with respect to
human  diagnostic  products based on the Company's  human gene  technology.  The
amended  agreement  simplified  procedures  for  outlicense  by SB of diagnostic
products  based on the Company's  human gene  technology.  In addition,  the new
agreement  permits  the  Company to develop  and  market  diagnostic  tests that
correspond  to  therapeutic  products  developed by the Company  pursuant to its
collaboration agreement with SB and to outlicense diagnostic tests corresponding
to therapeutic products outlicensed by the Company. Under the new agreement,  SB
has agreed to pay a royalty to the Company

                                      F-10

<PAGE>

                           HUMAN GENOME SCIENCES, INC.

                          NOTES TO FINANCIAL STATEMENTS

(NOTE E) - COLLABORATION AGREEMENTS (Continued)

Agreement with Smithkline & Beecham (Continued)

which is at a rate that is  competitive  in the  diagnostic  field on diagnostic
products based on the Company's human gene technology sold or outlicensed by SB.
Except for the modifications relating to human diagnostic products, this amended
agreement  has no effect on the existing  collaboration  between the Company and
SB, nor does it have any effect on  collaboration  agreements with the Company's
and SB's collaboration partners.

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
("Additional  Collaboration  Partner  Agreements") with Schering Corporation and
Schering  Plough  Ltd.  ("Schering  Plough"),  Synthelabo  S.A.,  and Merck KGaA
("Merck"),  (collectively "Additional  Collaboration Partners").  The Additional
Collaboration Partner Agreements provide the Additional  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
Additional  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  Additional  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 Additional  Collaborative  Partner Agreements to which the Company
is entitled is $87.5  million,  payable in equal  installments  over a five-year
period. The Company has recognized revenue of $16.5 million and $16.5 million in
license fees and additional payments during 1997 and 1996, respectively, related
to the Additional Collaboration Partner Agreements.

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.  In
January 1997,  the Company  received $3 million  pursuant to this agreement that
the  Company  recognized  as  revenue in 1997.  During  1996,  pursuant  to this
agreement,  the Company received and recorded as revenue $8 million from Pioneer
related to license fees and research payments.

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. During 1997, the Company
received and recorded as revenue $1 million from Roche  related to an additional
research payment.  The Company received $2 million from Roche in 1995, which was
recorded  as revenue in 1996.  The  Company  will  receive  additional  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

                                      F-11

<PAGE>

                           HUMAN GENOME SCIENCES, INC.

                          NOTES TO FINANCIAL STATEMENTS

(NOTE E) - COLLABORATION AGREEMENTS (CONTINUED)

Collaborative Agreements Outside of the SB Field (continued)

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 each in 1997 and 1996, 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  received $3
million  from  Pharmacia & Upjohn  Company in 1997  related to license  fees and
research  payments of which $2 million has been recorded as revenue  during 1997
with the  remaining  $1 million  recorded  as  deferred  revenues.  The  Company
received  $3  million  from  Pharmacia  & Upjohn  Company  in 1996 of which $1.5
million was recorded as deferred revenue at December 31, 1996, and recognized as
revenue in 1997.

(NOTE F) - PROPERTY, PLANT AND EQUIPMENT

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

<TABLE>
<CAPTION>
                                                                    December 31,
                                                                    ------------
                                                              1997               1996
                                                              ----               ----
<S>                                                         <C>              <C>        
Laboratory equipment....................................    $18,854,000      $16,692,000
Computers and EDP equipment.............................      6,073,000        5,363,000
Furniture and office equipment..........................      1,113,000        1,010,000
Leasehold improvements..................................      8,551,000        7,777,000
Construction in Progress................................      2,787,000                -
                                                         --------------      -----------
                                                             37,378,000       30,842,000
Less accumulated depreciation and amortization..........     16,731,000       12,811,000
                                                          -------------      -----------
                                                            $20,647,000      $18,031,000
                                                          ==============     ===========

</TABLE>

(NOTE G) - EQUIPMENT LEASE OBLIGATIONS

Prior to 1995,  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 has 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.
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 $81,000 and
$719,000 at December 31, 1997 and 1996, respectively.

As of December  31,  1997,  the Company had future  capital  lease  payments for
fiscal 1998 of $223,000.

                                      F-12

<PAGE>

                           HUMAN GENOME SCIENCES, INC.

                          NOTES TO FINANCIAL STATEMENTS

(NOTE G) - EQUIPMENT LEASE OBLIGATIONS (CONTINUED)

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 1997,  a lessor  exercised  warrants  for the  purchase  of 5,350  shares  by
electing to receive 5,161 shares.  In 1996, a lessor exercised  warrants for the
purchase of 18,000 shares by electing to receive  17,431  shares.  In 1995,  the
lessors  exercised  warrants for the  purchase of 230,000  shares by electing to
receive 216,330 shares.

(NOTE H) - OTHER ASSETS

Other assets at December 31, 1997 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:

<TABLE>
<CAPTION>
                                                                   December 31,
                                                                   ------------
                                                              1997               1996
                                                              ----               ----
<S>                                                        <C>                <C>        
Equipment purchases.....................................   $   868,000        $   561,000
Professional fees.......................................     1,223,000            489,000
Other accrued expenses..................................     2,565,000          2,311,000
                                                          -------------      -------------
                                                            $4,656,000        $ 3,361,000
                                                          =============      =============
</TABLE>

(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  (6.06% at December 31, 1997 and 5.64% at December 31, 1996), 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 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 fund was created under the terms of the trust indenture:

    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  $797,850  and $632,000 of
principal and interest  into this fund during the years ended  December 31, 1997
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.

                                      F-13

<PAGE>

                           HUMAN GENOME SCIENCES, INC.

                          NOTES TO FINANCIAL STATEMENTS

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

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,  1997 and 1996,  the Company  had  $1,452,000  and  $1,705,000,
respectively,  on deposit  with the bank that is invested  in a U.S.  Government
agency  security,  which is included in  Restricted  Investments  in the Balance
Sheets.  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.

(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  2017.  The leases  contain
various renewal options. Minimum annual rentals are as follows:

                       Years Ending December 31,
                       ------------------------------
                       1998............................$..2,304,000
                       1999...............................3,876,000
                       2000...............................3,765,000
                       2001...............................3,762,000
                       2002...............................3,767,000
                       Thereafter........................36,608,000
                                                      --------------
                                                        $54,082,000
                                                      ==============

The  Company  has  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 $300,000 and $262,000  included in
other liabilities at December 31, 1997 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.

The  Company  entered  into  a 20  year  lease  for a  process  development  and
production  facility  being built to the Company's  specifications.  Annual base
rent of $2.2  million is  expected  to begin  January 1, 1999,  the  anticipated
completion date of the facility.

Rent expense  aggregated  $2,384,000,  $1,988,000,  and $1,866,000 for the years
ended December 31, 1997, 1996 and 1995, respectively.

     Capital expenditures

At  December  31,  1997 and  1996,  the  Company  had  commitments  for  capital
expenditures,  consisting  primarily of  laboratory  equipment,  of $353,000 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
$235,000,  $168,000,  and $97,000 to the plan for the years ended  December  31,
1997, 1996, and 1995, respectively.

                                      F-14

<PAGE>
                           HUMAN GENOME SCIENCES, INC.

                          NOTES TO FINANCIAL STATEMENTS

(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, 1997 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 and 246,052 shares, respectively.

     Stock option plan

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,  of 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,
                              --------------------------------------------------------------------------------------------
                                          1997                          1996                           1995
                                               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                          293,618         $11.21         399,111          $ 9.16         428,592          $ 4.40

Options granted                        -              -               -               -          78,455           27.50

Options exercised               (105,748)          8.68         (96,128)           2.07         (73,449)           2.98

Options canceled or expired      (20,911)         14.41          (9,365)          17.90         (34,487)           4.89
                              -------------                  -------------                   -------------

Outstanding at end of year       166,959          12.41         293,618           11.21         399,111            9.16
                              =============                  =============                   =============

Options exercisable at end
   of year                       128,979          11.53         148,900            9.25         118,724            3.27
                              =============                  =============                   =============
</TABLE>

The following table summarizes  information  about stock options  outstanding at
December 31, 1997:

<TABLE>
<CAPTION>
                                              Options Outstanding                           Options Exercisable
                             ------------------------------------------------------    ------------------------------
                                                    Weighted-           Weighted-                         Weighted-
                                                 Average Remaining      Average                           Average  
                                 Number            Contractual          Exercise          Number          Exercise         
Range of Exercise Price       Outstanding        Life (In Years)          Price        Exercisable          Price          
                             ---------------     -----------------     ------------    -------------     ------------
<S>                               <C>                   <C>              <C>               <C>                <C> 
$.20 to $6.00                      92,806                5.4              $  2.66           78,331             2.23

$9.00 to $27.50                    74,153                7.5                24.60           50,648            25.91
                             ---------------     -----------------     ------------    -------------     ------------
                                  166,959                6.3               $12.41          128,979            11.53
                             ===============     =================     ============    =============     ============
</TABLE>

                                      F-15

<PAGE>
                           HUMAN GENOME SCIENCES, INC.

                          NOTES TO FINANCIAL STATEMENTS

(NOTE L) - STOCKHOLDERS' EQUITY (CONTINUED)

Stock option plan (continued)

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.  In February  1997, an
amendment  was approved to increase the number of shares  available for issuance
from 2,450,000 options to 3,450,000  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.

Additional  information with respect to 1994 Stock Option activity is summarized
as follows:

<TABLE>
<CAPTION>
                                                               YEARS ENDED DECEMBER 31,
                              --------------------------------------------------------------------------------------------
                                          1997                          1996                           1995
                              -----------------------------  -----------------------------   ------------------------------
                                               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                        1,528,779         $25.29         884,214          $18.01         655,958          $18.01

Options granted                1,644,351          48.57         790,616           32.18         348,263           17.86

Options exercised               (174,592)         18.66         (97,624)          17.42         (40,242)          17.75

Options canceled or expired     (122,588)         28.41         (48,427)          20.58         (79,765)          17.54
                              -------------                  -------------                   -------------
Outstanding at end of year     2,875,950          38.87       1,528,779           25.29         884,214           18.01
                              =============                  =============                   =============
Options  exercisable  at  end
   of year                       597,305          26.00         348,533          $20.05         190,861          $17.52
                              =============                  =============                   =============

</TABLE>

The following table summarizes  information  about stock options  outstanding at
December 31, 1997:

<TABLE>
<CAPTION>
                                              Options Outstanding                           Options Exercisable
                             ------------------------------------------------------    ------------------------------
                                                 
                                                 Weighted-Average       Weighted-                         Weighted- 
                                                    Remaining            Average                           Average  
                                 Number            Contractual           Exercise         Number           Exercise       
Range of Exercise Price       Outstanding        Life (In Years)          Price        Exercisable           Price       
                             ---------------     -----------------     ------------    -------------     ------------
<S>       <C>                     <C>                    <C>               <C>             <C>                <C>  
$12.75 to $22.00                  457,074                6.77              $16.71          267,114            17.11
$23.50 to $34.50                  634,150                8.34               28.62          136,450            25.87
$36.25 to $39.00                  739,375                9.15               37.37          108,925            37.31
$39.25 to $42.56                  695,351                9.63               40.09           84,816            39.66
$70.00 to $100.00                 350,000                9.06               87.14               -0-              -0-
                             ---------------     -----------------     ------------    -------------     ------------
                                2,875,950                8.70              $38.87          597,305            26.00
                             ===============     =================     ============    =============     ============

</TABLE>

The Company applies APB No. 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 1997,  1996 and 1995
pro forma net loss and net loss per  share 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

                                      F-16

<PAGE>

                           HUMAN GENOME SCIENCES, INC.

                          NOTES TO FINANCIAL STATEMENTS

(NOTE L) - STOCKHOLDERS' EQUITY (CONTINUED)

     Stock option plan (continued)

options in future years.  Had  compensation  cost for the Company's stock option
plans  been  determined  based  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 1997,  1996,  and 1995 would have been  approximately
$32.5 million,  $12.9 million,  and $32.8  million,  respectively,  or $1.51 per
share, $0.69 per share, and $2.08 per share, respectively. The fair value of the
options  granted  during  1997 and 1996 are  estimated  as $18.26 and $23.73 per
share, respectively, on the date of grant using the Black-Scholes option-pricing
model with the following  assumptions:  dividend yield 0%,  volatility of 46.03%
for 1997 and  63.61%  for 1996,  risk-free  interest  rate of 5.75% for 1997 and
6.28% for 1996, and expected life of 6 years.

At December 31, 1997,  options for 79,375 and 261,592 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:

<TABLE>
<CAPTION>
<S>                                                                                            <C>   
          (i) Warrants issued in conjunction with leasing agreements (Note G)...........       75,650
         (ii) Warrants issued to certain  stockholders (a)..............................       14,415
         (iii)Stock option plan - 1993 plan.....,.......................................      246,334
         (iv) Stock option plan - 1994 plan.............................................    3,137,542

</TABLE>
         (a)  These warrants were issued in connection with a commitment made by
              certain  stockholders  in 1993;  they are  exercisable at $.20 per
              share and expire in December 1998.

(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,
                                                                      -----------------------
                                                             1997              1996              1995
                                                             ----              ----              ----
<S>                             <C>                         <C>             <C>              <C>           
Federal income tax provision at 34%...................      $(7,181,000)    $(2,570,000)     $ (11,124,000)
State taxes, net of federal effect....................                -               -         (1,511,000)
Expenses for which no tax benefit is available........           31,000         112,000             96,000
Expenses for which no book benefit is available.......       (1,550,000)              -                  -
Utilization of NOL carryforward.......................                -               -                  -
Increase in valuation allowance on deferred tax
       assets.........................................       12,465,000       3,262,000         12,484,000

State taxes and valuation allowance change............       (1,286,000)       (391,000)                 -   
                                                                                                             
Foreign taxes paid....................................          245,000         225,000            500,000   

Tax credits generated and not used....................       (2,436,000)       (403,000)        (2,305,000)  

Other.................................................          (43,000)        (27,000)           209,000   
                                                        ---------------   ----------------  ---------------- 
                                                          $     245,000    $    208,000       $ (1,651,000)  
                                                        ===============   ================  ================ 
</TABLE>

                                      F-17

<PAGE>

                           HUMAN GENOME SCIENCES, INC.

                          NOTES TO FINANCIAL STATEMENTS

(NOTE M) - INCOME TAXES (CONTINUED)

Temporary differences and carryforwards 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, 1997
    Net operating loss carryforward......................................   $            -      $ 19,359,000
    Research and development tax credit carryforward.....................                -         7,186,000
    Depreciation.........................................................                -           744,000 
    Other................................................................          267,000           118,000
                                                                             ----------------  ----------------
                                                                                   267,000        27,407,000
    Less valuation allowance.............................................         (267,000)      (27,407,000)
                                                                            ================  ================
                                                                            $            -    $            -
                                                                            ================  ================
December 31, 1996
    Net operating loss carryforward......................................   $            -      $ 11,808,000
    Research and development tax credit carryforward.....................                -         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:

<TABLE>
<CAPTION>
                                                                     Years Ended December 31,
                                                                     -----------------------
                                                               1997             1996           1995
                                                               ----             ----           ----
<S>                                                        <C>             <C>               <C>         
Current:
    Federal.............................................   $           -   $         -       $(1,643,000)
    State...............................................                       (17,000)         (508,000)
    Foreign taxes.......................................         245,000       225,000           500,000
Deferred................................................               -             -                 -
                                                           -------------   --------------- --------------
                                                                $245,000   $   208,000       $(1,651,000)
                                                           =============   =============== ==============
</TABLE>
<TABLE>
<CAPTION>

The Company has available tax credit carryforwards expiring as follows:
<S>                                                                     <C>        
2000...............................................................     $   500,000
2001...............................................................         225,000
2002...............................................................         245,000
2008...............................................................         745,000
2009...............................................................       1,297,000
2010...............................................................         534,000
2011...............................................................         846,000
2012...............................................................       2,191,000
No expiration......................................................         238,000
                                                                      ==============
                                                                        $ 6,821,000
                                                                      ==============
</TABLE>

                                      F-18

<PAGE>

                           HUMAN GENOME SCIENCES, INC.

                          NOTES TO FINANCIAL STATEMENTS


(NOTE M) - INCOME TAXES (CONTINUED)

The Company has net operating loss carryforwards for federal income tax purposes
of  approximately  $51.0  million which  expire,  if unused,  from the year 2010
through the year 2012.  According  to APB 25, the tax  benefit of  approximately
$4.6 million of net operating  losses  related to stock options will be credited
to equity when the benefit is realized through  utilization of the net operating
loss carryforwards.

(NOTE N) - INVESTMENT IN VASCULAR GENETICS INC.

In November 1997, the Company entered into an agreement with three other parties
to  form  a new  privately  held  company,  Vascular  Genetics  Inc.  ("Vascular
Genetics"),  to pursue the  development  and  commercialization  of gene therapy
products for the treatment of vascular  diseases.  The Company will hold a 19.9%
equity interest in Vascular  Genetics'  common stock in exchange for technology.
Under the terms of the  agreement,  the Company  will  receive  warrants for the
purchase of an additional 5.1% equity interest in Vascular Genetics which can be
exercised at any time while  Vascular  Genetics is privately  held.  The Company
also  holds  preemptive  rights  that will  permit  retention  of the  Company's
ownership position in the event of a future financing.  In addition, the Company
has the option to  purchase  100% of  Vascular  Genetics'  common  stock at fair
market value upon  receiving  the approval from one of the other parties and the
board of directors of Vascular Genetics.  The Company will earn royalties on net
sales from products  developed and  commercialized  by Vascular Genetics or by a
party granted a sublicense by Vascular  Genetics.  Royalty rates are competitive
and increase as specified  sales targets are reached.  In addition,  the Company
has the option to manufacture  certain products  developed by Vascular  Genetics
Inc. and receive a manufacturing fee. The Company has committed to lend Vascular
Genetics up to $600,000  at an interest  rate of prime plus 1%. As of  12/31/97,
the Company had lent  $200,000 to Vascular  Genetics.  The Company has appointed
two directors to the Board of Directors of Vascular Genetics.

(NOTE O) - NET LOSS PER SHARE

The following table sets forth the computation of basic and diluted net loss per
share:

<TABLE>
<CAPTION>
                                                                       Years ended December 31,
                                                      -----------------------------------------------------------
                                                            1997                1996                  1995
                                                      -----------------    ---------------      -----------------
<S>                                                      <C>                  <C>                  <C>          
Numerator:
     Net loss                                            $(21,393,000)        $(7,767,000)         $(31,068,000)
                                                      =================    ================     =================
Denominator:
     Denominator for basic earnings per
       share - weighted-average shares                      21,525,283          18,630,986            15,723,144
                                                      =================    ================     =================
     Denominator for diluted earnings per
       share - adjusted weighted average
       shares and assumed conversions                       21,525,283          18,630,986            15,723,144
                                                      =================    ================     =================
Basic loss per share                                      $(0.99)              $(0.42)              $(1.98)
                                                      =================    ================     =================
Diluted loss per share                                    $(0.99)              $(0.42)              $(1.98)
                                                      =================    ================     =================

</TABLE>

                                      F-19

<PAGE>

                           HUMAN GENOME SCIENCES, INC.

                          NOTES TO FINANCIAL STATEMENTS

(NOTE P) - EVENT (UNAUDITED) SUBSEQUENT TO DATE OF INDEPENDENT AUDITORS' REPORT

     On March 2, 1998,  the Company  signed a ten year  agreement with Transgene
S.A.  ("Transgene"),  based in  Strasbourg,  France,  to  develop  gene  therapy
products.  Under the terms and conditions of the agreement,  Transgene will have
the right to exclusively license, and sublicense, up to 10 genes and to develop,
manufacture and commercialize any resulting gene therapy products worldwide. The
two  companies may also choose to co-develop  and co-market the  identified  new
gene therapy products, and, in such case,  commercialization rights will be held
by the Company for North  America and by Transgene for Europe and will be shared
equally  for the rest of the  world's  markets.  Transgene  will pay an  initial
licensing  fee and  research  funding  in an  amount  equal to the  proceeds  to
Transgene from the Company's purchase of a 10% interest in Transgene.  The value
of the 10% interest based on the anticipated close of Transgene's Initial Public
Offering  (currently in process) would be approximately $25 million.  Additional
payments to the Company are dependent  upon the number of genes which  Transgene
licenses  and the  accomplishment  of certain  milestones.  Royalties  on future
product sales and partnering  revenues will be paid by Transgene to the Company.
On  co-marketed  products,   the  Company  and  Transgene  will  pay  reciprocal
royalties.

                                      F-20



                                 LEASE AGREEMENT

                                     BETWEEN

                    MARYLAND ECONOMIC DEVELOPMENT CORPORATION

                                       AND

                           HUMAN GENOME SCIENCES, INC.

                             DATED DECEMBER 1, 1997


<PAGE>



                                TABLE OF CONTENTS
                                -----------------
<TABLE>
<CAPTION>
                                                                                      Page
                                                                                      ----
<S>                                                                                   <C>
1.       Demise of Leased Premises....................................................  1
2.       Certain Definitions..........................................................  2
3.       Title........................................................................ 10
4.       Plans and Specifications; Construction....................................... 11
5.       Use of Leased Premises....................................................... 11
6.       Term; Purchase Option........................................................ 12
7.       Rent......................................................................... 17
8.       Net Lease; Non-Terminability................................................. 20
9.       Payment of Impositions; Compliance with Law and Restrictive Covenants........ 21
10.      Liens; Recording and Title; Easements........................................ 22
11.      Indemnification.............................................................. 22
12.      Tenant's Equipment; Building Equipment; Maintenance and Repair............... 23
13.      Alterations.................................................................. 25
14.      Condemnation................................................................. 27
15.      Insurance.................................................................... 28
16.      Casualty and Restoration..................................................... 31
17.      Assignment and Subletting.................................................... 33
18.      Permitted Contests........................................................... 35
19.      Default Provisions........................................................... 36
20.      Additional Rights of Landlord................................................ 40
21.      Inspection................................................................... 41
22.      Notices, Demands and Other Instruments....................................... 42
23.      Estoppel Certificates........................................................ 42
24.      No Merger.................................................................... 43
25.      Representations and Warranties of Tenant..................................... 43
26.      Affirmative Covenants of Tenant.............................................. 45
27.      Negative Covenants of Tenant................................................. 51
28.      Non-Recourse................................................................. 52
29.      Separability................................................................. 52
30.      Subordination................................................................ 53
31.      Binding Effect............................................................... 54
32.      Heading...................................................................... 54
33.      Environmental Matters........................................................ 54
34.      Quiet Enjoyment.............................................................. 59
35.      Miscellaneous................................................................ 59

</TABLE>


<PAGE>

LIST OF EXHIBITS

EXHIBIT A       Description of Land
EXHIBIT B       List of Construction Contracts
EXHIBIT C       List of Tenant's Equipment
EXHIBIT D       Schedule of Option Purchase Prices
EXHIBIT E       Notice and Payment Addresses


                                       2
<PAGE>


                                 LEASE AGREEMENT

         THIS LEASE  AGREEMENT (this "Lease") is made as of December 1, 1997, by
and  between  MARYLAND  ECONOMIC  DEVELOPMENT  CORPORATION,  a body  politic and
corporate and an instrumentality of the State of Maryland ("Landlord") and HUMAN
GENOME SCIENCES, INC., a Delaware corporation ("Tenant").

                                    RECITALS

         A.  Landlord,  at the request of Tenant,  has acquired from  Montgomery
County,  Maryland a certain parcel of land located at the Johns Hopkins  Belward
Research Campus in Montgomery County,  Maryland,  more particularly described on
Exhibit A attached hereto and made a part hereof (the "Land") as further defined
in Paragraph 1 below). ---------

         B. Landlord is acquiring the Land at the request of Tenant for the sole
purposes  of  (a)   constructing   on  the  Land,  a  process   development  and
manufacturing plant consisting of approximately 80,000 square feet in accordance
with plans and  specifications  to be approved by Landlord  and Tenant,  and (b)
leasing the Leased Premises (hereinafter defined) to Tenant.

         C.  The  parties  desire  to  enter  into  this  Lease  defining  their
respective rights,  duties,  obligations and liabilities  relating to the Leased
Premises.

                                   AGREEMENTS

         NOW,  THEREFORE,  in consideration of the mutual promises and covenants
contained  herein,  and other good and valuable  consideration,  the receipt and
sufficiency  of which  are  hereby  acknowledged,  Landlord  and  Tenant  hereby
covenant and agree as follows:

         A.  Demise  of  Leased  Premises.  In  consideration  of the  rents and
covenants  herein  stipulated to be paid and performed,  Landlord hereby demises
and lets to Tenant,  and  Tenant  hereby  demises  and lets from  Landlord,  the
premises  (collectively,  the "Leased Premises") consisting of (i) the parcel of
land  described in Exhibit A hereto,  together  with the  easements,  rights and
appurtenances  thereunto belonging or appertaining  (collectively,  the "Land"),
(ii) the buildings,  structures and other  improvements to be constructed on the
Land  pursuant  to  Paragraph  4 hereof  (the  "Improvements"),  and  (iii)  the
equipment and fixtures to be installed in the Improvements which are integral to
the  occupancy  of the  Leased  Premises  as a  "tenantable  shell"  (e.g.,  all
elevators,  escalators,  shades, awnings, floor coverings,  screens, landscaping
and security systems and building code required



<PAGE>

plumbing, heating, electrical, ventilation and fire-extinguishing equipment) and
financed  with  proceeds of the Bonds  (hereinafter  defined) or the State Loans
(hereinafter  defined) as evidenced  through the requisitions  from the Facility
Fund  (hereinafter  defined)  and the  requisitions  for the  State  Loans  (the
"Building   Equipment"),   but  excluding   therefrom  the  Tenant's   Equipment
(hereinafter defined).

         2. Certain Definitions.  The following terms shall have the definitions
provided below.  Unless specifically  provided  otherwise,  all accounting terms
have the definitions given them in accordance with GAAP (hereinafter defined) as
applied to the applicable Person on a consistent basis by its accountants in the
preparation of its previous annual financial statements.
 
         Act of  Bankruptcy  means with  respect to any Person,  the filing of a
petition in  bankruptcy  under the  Bankruptcy  Code, or the  commencement  of a
proceeding under any other applicable law concerning insolvency,  reorganization
or bankruptcy, by or against such Person as debtor.

         Accumulated   Funding   Deficiency   means  an   "accumulated   funding
deficiency" as defined in Section 302 of ERISA or Section 412(a) of the Code.

         Additional Rent means Additional Rent as defined in Paragraph 7.

         Affiliate means: (a) any Person in which Tenant legally or beneficially
owns or  holds,  directly  or  indirectly,  any  capital  stock or other  equity
interest;  (b) any Person that is a partnership in which Tenant is a partner, or
a joint  venturer in which  Tenant is a joint  venturer  or a limited  liability
company of which Tenant is a managing member; (c) any Person that is a director,
officer,  employee,  stockholder (legally or beneficially) or other affiliate of
any of the  foregoing  or of  Tenant;  and  (d)  any  Person  that  directly  or
indirectly  controls,  is under the control of, or is under common control with,
Tenant,  including,  without limitation,  any Person that directly or indirectly
has the right or power to direct the  management  or  policies of Tenant and any
Person whose  management or policies Tenant directly or indirectly has the right
or power to direct.

         Alterations  means  all  changes,   additions   (including   additional
Improvements  on  the  Land),  improvements  or  repairs  to,  all  alterations,
reconstructions,  renewals or removals of and all  substitutions or replacements
for  any of  the  Improvements,  both  interior  and  exterior,  structural  and
non-structural, and ordinary and extraordinary.




                                       2
<PAGE>

         Assignments means, collectively, the Bond Assignment and the State Loan
Assignment.

         Bank means The First  National  Bank of  Maryland,  a national  banking
association, its successors and assigns.

         Bankruptcy  Code means Title 11 of the United  States Code, as amended,
and all rules and regulations promulgated pursuant thereto.

         Basic Rent means Basic Rent as defined in Paragraph 7.

         Basic Rent Payment Date means any date on which an installment of Basic
Rent is due pursuant to Paragraph 7 hereof.

         Beneficiaries  mean,  collectively,  the Bond Beneficiary and the State
Loan Beneficiary.

         Bond Assignment means the Assignment, Subordination and Non-Disturbance
Agreement by and among Landlord,  the Tenant and the Bank,  dated as of December
1, 1997, together with all amendments thereto and modifications thereof.

         Bond  Beneficiary  means,  collectively,  MIDFA, the Bank and any other
Credit Facility Provider, as Beneficiary under the Bond Deed of Trust.

         Bond Deed of Trust  means  the Deed of Trust  dated as of  December  1,
1997,  encumbering  the Leased  Premises,  from  Landlord to certain  individual
trustees for the benefit of the Bond  Beneficiary,  together with all amendments
thereto and modifications thereof.

         Bond Documents has the meaning given to such term in the Indenture.

         Bond  Purchase  Drawing  has the  meaning  given  to  such  term in the
Indenture.

         Bonds means the $23,000,000  Taxable  Variable Rate  Demand/Fixed  Rate
Revenue Bonds (Human Genome Sciences,  Inc. Facility),  1997 Issue, being issued
by the  Landlord  to  finance a  portion  of the  costs of the  acquisition  and
construction of the Leased Premises.

         Building  Equipment  means the  Building  Equipment  as  defined in the
Recitals to this Lease.



                                       3
<PAGE>

         Closing Date means the date on which fully  executed and  authenticated
Bonds are issued and initially delivered.

         Code  means  the  Internal  Revenue  Code of  1986,  or any  applicable
predecessor statutory provision.  Each reference to a section of the Code herein
shall be deemed to include the United States  Treasury  Regulations in effect or
proposed from time to time with respect thereto.

         Collateral Pledge Agreement means the Collateral Pledge Agreement dated
as of December 1, 1997 from Tenant to  Landlord,  together  with all  amendments
thereto and modifications thereof.

         Commonly  Controlled Entity means any trade or business (whether or not
incorporated) which is a member of a "controlled group of corporations" (as such
phrase  is used and  defined  in  Section  414(b) of the Code) or which is under
"common  control"  (as such phrase is used and defined in Section  414(c) of the
Code), and of which Tenant or any Subsidiary of Tenant is a part.

         Construction  Contracts  means  those  certain  Construction  Contracts
between  Contractors  and Landlord  listed on Exhibit B hereto (which  Exhibit B
shall be updated from time to time if and when new  construction  contracts  are
entered into with Tenant's written consent).

         Contractors means the contractors named in the Construction Contracts.

         Credit  Facility  Agreement  has the meaning  given to such term in the
Indenture.  The  initial  Credit  Facility  Agreement  is the  Letter  of Credit
Agreement.

         Credit  Facility  Documents  has the meaning  given to such term in the
Indenture.  The  initial  Credit  Facility  Documents  are the  Letter of Credit
Documents.

         Credit  Facility  Provider  has the  meaning  given to such term in the
Indenture. The initial Credit Facility Provider is the Bank.

         Deeds of Trust  means,  collectively,  the Bond  Deed of Trust  and the
State Loan Deed of Trust.

         Default Rate means the Default Rate as defined in Paragraph 7(e).

         Encumbrances means Encumbrances as defined in Paragraph 30.



                                       4
<PAGE>

         ERISA means the Employee  Retirement  Income  Security Act of 1974,  as
amended, and all Laws promulgated pursuant thereto or in connection therewith.

         Event of Default means an Event of Default as defined in Paragraph 19.

         Facility Fund means the "Facility Fund", as such term is defined in the
Indenture.

         GAAP  means  generally  accepted  accounting  principles  in the United
States of  America in effect  from time to time,  consistently  applied.  In the
event of a change in GAAP affecting the covenants  contained in Paragraphs 26 or
27 of this Lease or definitions  contained in Paragraph 2 of this Lease relating
to such covenants,  such covenants and definitions  shall continue to be applied
as though such change in GAAP had not occurred  unless and until  Landlord,  the
Credit Facility Provider,  MIDFA, the State and Tenant shall agree in writing to
amend or adjust such covenants or definitions as deemed necessary as a result of
such change in GAAP.

         Hedge means any  interest  rate swap or similar  hedge  arrangement  in
existence  at any  time or from  time to time  between  Landlord  and the  Hedge
Counterparty.

         Hedge  Agreement  means any  agreement  between  Landlord and the Hedge
Counterparty  in  existence  at any  time or  from  time to  time,  executed  in
connection with the Hedge, including (without limitation) the Swap Agreement (as
defined in the Letter of Credit Agreement), together with all amendments thereto
and modifications thereof.

         Hedge Counterparty means any Person, in its capacity as counterparty to
the Hedge Agreement,  with which Landlord has entered the Hedge or may hereafter
at any time or from  time to time  enter  into  the  Hedge,  including  (without
limitation) the Bank and any other Credit Facility Provider.

         Hedge Documents means, collectively,  the Hedge Agreement and all other
documents in existence at any time or from time to time,  executed and delivered
to evidence, secure, or in connection with, the Hedge.

         Impositions means all taxes, including,  without limitation,  sales and
use taxes (but excluding,  except as hereinafter  provided,  income,  franchise,
profits and gross receipt taxes),  assessments  (including,  without limitation,
all  assessments for public  improvements  or benefits),  water and sewer rents,
rates and



                                       5
<PAGE>

charges,  excises,  levies, license fees, permit fees, inspection fees and other
authorization fees and other charges or costs of any nature whatsoever,  in each
case  whether  general  or  special,  ordinary  or  extraordinary,  foreseen  or
unforeseen,  of every character  (including all interest and penalties thereon),
which at any time  during  or in  respect  of the term  hereof  may be  assessed
against,  levied  upon,  confirmed or imposed on, or in respect of, or be a lien
upon  (a) the  Leased  Premises  or any part  thereof  or any  estate,  right or
interest therein, (b) any occupancy, use or possession of, or activity conducted
on, the Leased  Premises or any part  thereof,  (c) any Basic Rent or Additional
Rent or other sum reserved or payable by Tenant hereunder,  or (d) this Lease or
Landlord. Notwithstanding the foregoing provisions, the term "Impositions" shall
exclude (i) franchise,  capital stock or similar taxes,  if any, of Landlord and
assessments,  levies and liens arising therefrom; (ii) transfer, income, profits
or other taxes,  if any, of Landlord,  determined on the basis of its net income
or net revenues,  and  assessments,  levies and liens arising  therefrom;  (iii)
excise,  gross  receipts or gross income taxes imposed upon or measured by Basic
Rent,  Additional  Rent or other sums payable by Tenant  pursuant to this Lease,
unless the taxes  referred  to in clauses (i) and (ii) above are in lieu of or a
substitute  for any other tax or  assessment  upon or with respect to the Leased
Premises or any increases therein which, if such other tax or assessment were in
effect, would be payable by Tenant.

         Improvements means Improvements as defined in Paragraph 1.

         Indenture  means  the  Trust  Indenture  dated as of  December  1, 1997
between  Landlord  and the Trustee,  together  with all  amendments  thereto and
modifications thereof.

         Insurance  and  Award  Trustee  has the  meaning  given to that term in
Paragraph 15.

         Land means that parcel of land described in Exhibit A attached  hereto,
together with the easements,  rights and  appurtenances  thereunto  belonging or
appertaining.

         Landlord  means  Maryland  Economic  Development  Corporation,  a  body
politic and corporate and a public instrumentality of the State of Maryland.

         Landlord's Bond Obligations  means the "Issuer's Bond  Obligations," as
such term is defined in the Indenture.



                                       6
<PAGE>

         Landlord's  Credit  Facility  Obligations  means the  "Issuer's  Credit
Facility Obligations", as such term is defined in the Indenture.

         Landlord's  State  Loan  Obligations  means all of  Landlord's  limited
obligations  to the State pursuant to the terms and conditions of the State Loan
Documents.

         Law means the  Constitution  of the  United  States and of the State of
Maryland and any statute or rule of law of the United States and of the State of
Maryland.

         Lease Documents has the meaning given to such term in Paragraph 25.

         Leased  Premises  means the Land,  the  Improvements  and the  Building
Equipment.

         Legal Requirements means all laws, statutes,  codes, acts,  ordinances,
orders, judgments, decrees, injunctions, rules, regulations,  permits, licenses,
authorizations,  directions,  requirements  and agreements with all governments,
departments,  commissions, boards, courts, authorities,  agencies, officials and
officers, foreseen or unforeseen, ordinary or extraordinary, which now or at any
time hereafter may be applicable to the use, occupancy, possession, maintenance,
alteration, repair or reconstruction of any of the Leased Premises.

         Letter of Credit  means that  certain  Letter of Credit to be issued by
the Bank in the  original  stated  amount  of  $23,378,083  for the  account  of
Landlord  as  security  for the  Bonds,  as the same  may  from  time to time be
modified, amended, supplemented, renewed or replaced.

         Letter  of  Credit  Agreement  means  that  certain  Letter  of  Credit
Agreement  between the Bank and  Landlord  dated as of December 1, 1997,  as the
same  may from  time to time be  modified,  amended,  supplemented,  renewed  or
replaced.

         Letter of Credit  Documents  has the meaning  given to such term in the
Letter of Credit Agreement.

         LIBOR Rate means the fluctuating annual rate of interest which shall at
all times equal the interest rate which the Credit Facility  Provider  announces
and  declares  from time to time to be its one month  London  Interbank  Offered
Rate, adjusted for any Federal Reserve Board requirements  imposed on the Credit
Facility  Provider from time to time. All interest at the LIBOR Rate or computed
thereon  shall be  calculated  on the basis of a 360-day year factor  applied to
actual days  elapsed and shall be adjusted on any date on which a change  occurs
in the LIBOR Rate.



                                       7
<PAGE>

         MIDFA means the Maryland Industrial Development Financing Authority.

         MIDFA Insurance  Agreement  means the Insurance  Agreement of even date
herewith by and among MIDFA, the Bank and Landlord, together with all amendments
thereto and modifications thereof.

         Multiemployer  Plan means a multiemployer plan (as defined in ERISA) to
which Tenant, or any Commonly  Controlled Entity, as appropriate,  has or had an
obligation to contribute.

         Net Award has the meaning given to such term in Paragraph 14.

         Net Proceeds has the meaning given to such term in Paragraph 15.

         Paying Agent has the meaning given to such term in the Indenture.

         Permitted  Equipment Lien means any  encumbrance or other lien upon, or
security  interest in, or any  equipment  lease of, any Tenant's  Equipment,  or
interest  therein,  provided that the acquisition to which any such encumbrance,
lien, security interest or lease relates shall not result in a default under any
other provisions of this Lease.

         Permitted Use means the Permitted Use as defined in Paragraph 5.

         Person  means  any  natural  person,  firm,  association,  corporation,
company, trust, partnership, public body or other entity.

         Plan means any pension,  profit sharing,  savings, stock bonus or other
deferred  compensation  plan which is intended to qualify under Code '401 and is
subject to the requirements of ERISA, together with any related trusts.

         Plans means the Plans and  Specifications  for the  Improvements  which
have been approved,  and which will be approved from time to time, in writing by
Landlord and Tenant,  as the same may be modified or amended in accordance  with
Paragraph 4.

         Prohibited  Transaction means a "prohibited  transaction" as defined in
Section 406 of ERISA or Section 4975 of the Code.

         Rating Agency means any rating agency which at any time or from time to
times provides or furnishes a rating with respect to the Bonds.



                                       8
<PAGE>

         Registrar has the meaning given to such term in the Indenture.

         Remarketing Agent has the meaning given to such term in the Indenture.

         Remarketing  Agreement means the "Placement and Remarketing  Agreement"
as such term is defined in the Indenture.

         Rent  Commencement  Date means the Rent Commencement Date as defined in
Paragraph 7(a).

         Reportable  Event means a "reportable  event" as defined by Title IV of
ERISA.

         Restrictive Covenants means the covenants and restrictions set forth in
(a)  the  Declaration  of  Covenants,  Easements  and  Restrictions  (Protective
Covenants)  made  the  24th  day  of  September,  1997,  by  The  Johns  Hopkins
University,  and recorded among the Land Records of Montgomery County, Maryland,
in Liber  15181 at folio  074,  and (b) The  Johns  Hopkins  University  Belward
Research Campus Declaration of Covenants, Conditions, Easements and Restrictions
made the 24th day of  September,  1997,  by The Johns  Hopkins  University,  and
recorded among the Land Records of Montgomery County,  Maryland,  in Liber 15181
at folio 084.

         Scheduled  Completion  Date means December 30, 1999,  regardless of the
actual date the Improvements are completed.

         State  means  the  State  of  Maryland,  acting  through  the  Maryland
Department  of Business and Economic  Development  and any other  department  or
agency of the State of Maryland which makes any of the State Loans to Landlord.

         State Loans means, collectively,  the following loans to be made by the
State to  Landlord  for the  purpose of  financing a portion of the costs of the
acquisition and construction of the Leased Premises:

               (a)  Loan  in  the  principal  amount  of  $2,000,000,  from  the
                    Maryland  Department  of Business and  Economic  Development
                    under the Maryland Industrial Land Act;

               (b)  Loan in the  principal  amount  of  $3,000,000,  made by the
                    Maryland  Department  of Business and  Economic  Development
                    from the Maryland  Industrial and  Commercial  Redevelopment
                    Fund; and



                                       9
<PAGE>

               (c)  Loan in the  principal  amount  of  $2,000,000,  made by the
                    Maryland  Department  of Business and  Economic  Development
                    from the Maryland Economic Development Opportunities Program
                    Fund.

         State  Loan  Assignment   means  the  Assignment,   Subordination   and
Non-Disturbance Agreement by and among Landlord, the Tenant and the State, dated
December  31,  1997,  together  with all  amendments  thereto and  modifications
thereof.

         State Loan Beneficiary means the Beneficiary as such term in defined in
the State Loan Deed of Trust.

         State Loan Deed of Trust means the Second Deed of Trust dated  December
31, 1997,  encumbering the Leased Premises,  from Landlord to certain individual
trustees  for the  benefit  of the State  Loan  Beneficiary,  together  with all
amendments thereto and modifications thereof.

         State  Loan  Documents  means,  collectively,  any  and  all  documents
executed  and  delivered  by  Landlord as  evidence  of, as security  for, or in
connection with, the State Loans,  including (without limitation) the State Loan
Deed of Trust and the State Loan Assignment.

         Subsidiary  means,  with  respect to any Person,  any present or future
corporation at least a majority of whose  outstanding  Voting Stock shall at the
time be owned by such Person or by one or more  Subsidiaries of such Person,  or
by such Person and one or more Subsidiaries of such Person.

         Substantial  Completion means the date on which the Improvements are in
such  condition  that Tenant may commence its final fit out of the  Improvements
and move in and a Certificate of Occupancy of a tenantable shell either has been
issued or would be issued except for work to be performed by Tenant.

         Tenant's Equipment means that certain equipment  described on Exhibit C
attached  hereto  (as such  Exhibit  C may from time to time be  updated  by the
Tenant to include equipment to be used for the Permitted Use), together with all
replacements  thereof.  It is anticipated that some or all of Tenant's Equipment
will be leased by Tenant.

         Term means the Term as defined in Paragraph 6.

         Trustee means FMB Trust Company,  National Association,  its successors
and assigns.


                                       10
<PAGE>

         Voting  Stock  means  the  shares of any  class of  capital  stock of a
corporation  having  ordinary  voting power to elect the directors,  managers or
trustees thereof  (irrespective of whether or not at the time stock of any class
or classes of such  corporation  shall have or might have voting power by reason
of the happening of any contingencies).

         3.       Title.
                  (a) The Leased Premises are demised and let subject to (i) the
Deeds of Trust and any Encumbrances  executed in connection therewith and all of
the terms and  provisions  thereof,  including but not limited to the provisions
governing  disbursement of insurance proceeds and condemnation  awards, (ii) the
existing  state of the  title of the Land as of the date  hereof  and any  other
exceptions  or  encumbrances  of  record  as of the date  hereof  and any  other
restrictions,  exceptions and  Encumbrances  entered into subsequent to the date
hereof with Tenant's  knowledge and written consent,  which consent shall not be
unreasonably  withheld or delayed  provided  Tenant's  rights  hereunder are not
adversely  affected in a material manner (including  Tenant's option to purchase
the Leased Premises as hereinafter provided),  (iii) any state of facts which an
accurate  survey or physical  inspection of the Leased  Premises might show, and
(iv) the condition of the Leased  Premises,  as of the Rent  Commencement  Date,
without  representation  or  warranty by  Landlord,  and  without  liability  or
obligation of Landlord for patent or latent defects  (except that Landlord shall
assign the  benefit of all  warranties  written and implied to Tenant and Tenant
shall be a third party  beneficiary of such  warranties  under the  Construction
Contracts).

          (b)  Tenant has made its own investigation as to the existing state of
               the  title  of the Land  and has  made  arrangements  for its own
               survey.

         4.    Plans and Specifications; Construction.

          (a)  Landlord will cause the  Improvements  to be  constructed  on the
               Land in  accordance  with the Plans by the execution and delivery
               of the Construction Contracts. Landlord has entered into, or will
               enter  into,  the  Construction  Contracts  listed  on  Exhibit B
               attached hereto.

          (b)  Landlord will not agree to any modifications of the Plans without
               Tenant's consent thereto, and any modifications to the Plans will
               be made and approved in accordance  with the  requirements of



                                       11
<PAGE>

               the Bond Documents,  the Credit Facility  Documents and the State
               Loan Documents.

          (c)  Any change orders with respect to the Construction Contracts will
               be entered into and approved in accordance with the  requirements
               of the Bond  Documents,  the Credit  Facility  Documents  and the
               State Loan Documents.

          (d)  Landlord may enter into additional  Construction  Contracts.  All
               such  Construction  Contracts  are subject to Tenant's  approval,
               which approval will not be unreasonably  withheld or delayed, and
               must be approved by the Credit Facility Provider and the State.

         5.       Use of Leased Premises.

                  Tenant  shall  occupy  and use the Leased  Premises  only as a
biological   research,   product   development  and  manufacturing  and  related
administrative  use facility  (the  "Permitted  Use"),  or for such other lawful
purpose as may be approved by Landlord, the Credit Facility Provider,  MIDFA and
the State in their sole  discretion  (except that Landlord,  the Credit Facility
Provider,  MIDFA  and the  State  will  not  unreasonably  withhold  consent  to
additional uses which are related to the Permitted Use),  subject,  in addition,
to  the  terms  and  provisions  of  any  covenants,  easements,  conditions  or
restrictions  of record now or hereafter  recorded  with the written  consent of
Tenant,  including  but not  limited  to the Deeds of Trust and the  Restrictive
Covenants,  and for no other  purpose.  Tenant  shall  not  abandon  the  Leased
Premises. Tenant shall not permit any unlawful occupation,  business or trade to
be  conducted  on any of the  Leased  Premises  or any  use to be  made  thereof
contrary to  applicable  Legal  Requirements.  Tenant shall not use or occupy or
permit  any of the  Leased  Premises  to be used or  occupied,  nor do or permit
anything to be done in or on any of the Leased Premises, in a manner which would
or might (i) make void or voidable any  insurance  then in force with respect to
any of the Leased Premises,  (ii) make it difficult or impossible to obtain fire
or other  insurance which Tenant is required to furnish  hereunder,  (iii) cause
structural  injury to any of the  Improvements,  or (iv)  constitute a public or
private nuisance or waste.



                                       12
<PAGE>

         6.       Term; Purchase Option.

                  (a) This Lease shall be  effective  from and after the date of
its execution and delivery by Landlord and Tenant, December 31, 1997. Subject to
the terms,  covenants,  agreements and conditions contained herein, Tenant shall
have and hold the Leased Premises for a term (the "Term") commencing on the Rent
Commencement  Date and ending at midnight on January 1, 2019. From the effective
date of this Lease, as set forth above,  to and including the Rent  Commencement
Date,  Tenant shall have the right to enter the Leased  Premises for the purpose
of performing,  or causing to be performed,  "tenant  improvement  work" for the
purpose of installing,  or causing to be installed,  Tenant's  Equipment and for
the purpose of monitoring the construction of the Improvements.

                  Landlord shall have the right during the last twelve months of
the Term of this Lease to (i) advertise the  availability of the Leased Premises
for sale or for reletting and to erect upon the Leased Premises signs indicating
such availability  (provided that such signs do not unreasonably  interfere with
the use of the Leased Premises by Tenant),  and (ii) show the Leased Premises to
prospective  purchasers  or tenants at such  reasonable  times and on reasonable
prior notice during  normal  business  hours as Landlord may select,  subject to
Tenant's customary access restrictions.

                  (b) Provided  that,  at the time of exercise of the  following
purchase  option  and at the  time of  closing  of the  purchase  of the  Leased
Premises  pursuant to such option,  (i) no Event of Default or event which, with
the giving of notice or the lapse of time, or both, would constitute an Event of
Default  which would  entitle  Landlord to terminate  this Lease or evict Tenant
from possession of the Leased Premises,  shall exist, (ii) all payments of Basic
Rent and  Additional  Rent shall have been paid through the date of the exercise
of such purchase option,  and (iii) this Lease shall be in full force and effect
(unless this Lease in not in full force and effect due to  Landlord's  default),
then  Tenant  shall  have the right and  option,  by giving  notice as set forth
below, to acquire the Leased  Premises from Landlord as provided  below.  Tenant
may not exercise such  purchase  option during any period in which the Bonds are
not subject to redemption  pursuant to Section  3.1(c) or Section  3.1(e) of the
Indenture,  unless the Bonds are to remain outstanding after the closing of such
purchase option.

                  From and after  the date  which is five  years  after the Rent
Commencement Date, Tenant may exercise such purchase option by written notice to
Landlord,  with a copy of such  written  notice


                                       13
<PAGE>

to MIDFA,  the State and the Credit  Facility  Provider;  provided  that, in the
event that  Landlord is in default under the  provisions of the Bond  Documents,
the Credit  Facility  Documents or the State Loan  Documents and such default is
not the result of an Event of Default under this Lease, Tenant may also exercise
such purchase option during such five year period by written notice to Landlord,
with a copy of such written notice to MIDFA,  the State and the Credit  Facility
Provider.  If Tenant  exercises  such  purchase  option by giving  such  written
notice,  and (i) the Bonds have been  previously  redeemed,  the closing of such
purchase option shall occur no later than the 90th day following such notice (or
the next business day if such 90th day is not a business day), or (ii) the Bonds
then bear interest at a variable rate, the closing of such purchase option shall
occur no later than the 180th day  following  such notice (or the next  business
day if the  180th day is not a  business  day),  or (iii)  the  Bonds  then bear
interest at a fixed rate,  the closing of such  purchase  option  shall occur no
later  than the later of (A) the  first  day on which the Bonds may be  redeemed
pursuant to Section  3.1(e) of the  Indenture,  and (B) the 180th day  following
such notice (or the next  business day if the 180th day is not a business  day),
PROVIDED  THAT,  in the case of (ii) or (iii)  above,  unless  the  Bonds are to
remain  outstanding  after the closing of such purchase  option,  the closing of
such  purchase  option  shall not take place  unless  all Bonds  shall have been
redeemed on or before the date of the closing of such purchase option.

                  Not later  than 50 days  prior to the date of the  closing  of
such purchase  option,  Tenant shall pay to Landlord,  in immediately  available
funds, the sum of the following (the "Basic Purchase Price"), which sum shall be
held,  in trust,  by  Landlord  and used by  Landlord  solely  for the  purposes
hereinafter set forth:

                           (A) the applicable option purchase price set forth on
         the Schedule of Option Purchase Prices attached hereto as Exhibit D and
         made a part hereof, plus

                           (B) if Tenant exercises such purchase option during a
         period in which the Bonds bear  interest at a fixed rate,  an amount of
         money equal to any redemption  premium  payable upon  redemption of the
         Bonds on the next  optional  redemption  date as set  forth in  Section
         3.1(e) of the  Indenture,  unless  the Bonds are to remain  outstanding
         after the closing of such purchase option.

Any portion of the Basic  Purchase  Price which is not paid to the  Trustee,  as
provided below,  will be held by Landlord,  in trust,  upon terms and conditions
mutually  acceptable to Landlord and



                                       14
<PAGE>

Tenant, in an interest bearing account at a commercial bank mutually  acceptable
to Landlord and Tenant, pending the closing of such purchase option.

                  Upon receipt by Landlord of the Basic Purchase Price, Landlord
shall  pay to the  Trustee  from  the  Basic  Purchase  Price,  to be held in an
irrevocable  escrow for the redemption of the Bonds,  in  immediately  available
funds, an amount  sufficient,  when added to moneys then held by the Trustee and
available for the redemption of Bonds, to redeem all of the Bonds in full on the
next date on which  the Bonds may be  redeemed  pursuant  to  Section  3.1(c) or
3.1(e) of the Indenture,  unless the Bonds are to remain  outstanding  after the
closing of such purchase option.

                  In addition,  at the closing of such purchase  option,  Tenant
shall pay to Landlord, in immediately available funds, the sum of the following:

                           (A) all Basic Rent and  Additional  Rent  through the
         date of the closing of such purchase option, plus

                           (B)  all  actual   third  party  costs  and  expenses
         (including  reasonable  attorneys  fees  and  expenses)  of the  Credit
         Facility Provider,  Landlord, MIDFA and the State (excluding Landlord's
         internal overhead) incurred in connection with such purchase, including
         (without  limitation) any costs incurred by Landlord in connection with
         "unwinding" the Hedge, but deducting any benefits  accruing to Landlord
         in connection with "unwinding" the Hedge, plus

                           (C) all transfer  and  recordation  taxes,  brokerage
         fees, if any, and other costs and expenses  required or necessary to be
         paid in  connection  with the  transfer  of the  Leased  Premises  from
         Landlord to Tenant.

                  At the closing of such  purchase  option,  Landlord will use a
portion of the Basic Purchase Price received by Landlord to pay the  outstanding
principal  balance  and all  accrued  and unpaid  interest  on the State  Loans;
provided,  however,  that in the event that, in connection  with the purchase of
the Leased Premises by Tenant pursuant to such purchase  option,  Tenant assumes
all of the  obligations  of Landlord under the State Loan Documents with respect
to the State Loans, the Basic Purchase Price will be reduced by the total amount
of the State  Loans  then  outstanding  which are so assumed by Tenant as of the
date of the closing of such purchase option.

                  If, at the time Tenant exercises such purchase option,  any of
the Bonds  shall have been  redeemed or paid prior to 



                                       15
<PAGE>

maturity  or any  portion of the  principal  of the State  Loans shall have been
prepaid  prior to  maturity,  the Basic  Purchase  Price  shall be reduced by an
amount equal to the total amount of Bonds so redeemed or paid and the portion of
the principal of the State Loans so prepaid.

                  If, at the time Tenant exercises such purchase  option,  there
shall be on deposit  with the Trustee  any moneys  which are  available  for the
redemption  of the Bonds  upon the  closing  of such  purchase  option,  and the
outstanding  Bonds are to be redeemed upon the closing of such purchase  option,
the Basic  Purchase  Price shall be reduced by an amount  equal to the amount of
moneys so on deposit with the Trustee.

                  Upon  Tenant's  exercise of such purchase  option,  Tenant may
advise Landlord that Tenant will purchase the Leased  Premises  pursuant to such
purchase  option,  subject  to  the  Bond  Documents  and  the  Credit  Facility
Documents, and that Tenant either will assume all of the obligations of Landlord
under  the  Bond  Documents  and  the  Credit  Facility  Documents  or,  in  the
alternative,  pay the portion of the Basic  Purchase Price  attributable  to the
outstanding  Bonds by the  delivery of a loan  agreement,  or similar  document,
evidencing  Tenant's  agreement to pay Landlord  amounts which are sufficient to
enable Landlord to pay its monetary obligations under the Bond Documents and the
Credit Facility  Documents,  in which event (i) the Basic Purchase Price will be
reduced by the principal amount of the Bonds which would have been redeemed upon
the  closing of such  purchase  option,  (ii) at or prior to the closing of such
purchase  option,  Tenant and Landlord will execute and deliver such  documents,
and take such actions,  as Landlord,  the Credit Facility Provider and MIDFA may
require,  in their sole  discretion,  to provide for the assumption by Tenant of
Landlord's  obligations  under  the  Bond  Documents  and  the  Credit  Facility
Documents,  and (iii) the Bonds will not be redeemed but will remain outstanding
after the closing of such purchase option.

                  At the closing of such purchase  option,  Landlord  shall pay,
from the moneys paid to Landlord by Tenant as set forth above, (1) to the State,
in immediately  available  funds,  an amount  sufficient to pay the  outstanding
principal of and accrued and unpaid interest on the State Loans,  unless, and to
the extent that,  Tenant shall have assumed all of the  obligations  of Landlord
under the State Loan  Documents  as set forth  above,  (2) to the  Trustee,  the
Paying Agent,  the Registrar,  the  Remarketing  Agent,  the Rating Agency,  the
Credit  Facility  Provider,  MIDFA,  the State and the Hedge  Counterparty,  all
accrued fees, costs and expenses then payable to the Trustee,  the Paying Agent,
the Registrar,  the Remarketing  Agent,  the Rating Agency,  the Credit Facility
Provider,  MIDFA,  the  State  and the  Hedge  Counterparty,  (3) to the



                                       16
<PAGE>

Credit Facility Provider,  MIDFA and the State, all actual third party costs and
expenses (including  reasonable attorneys fees and expenses) incurred by them in
connection  with  such  purchase  of the  Leased  Premises  by  Tenant  and,  if
applicable,  in connection  with the assumption by Tenant of the  obligations of
Landlord  under the State  Loan  Documents,  the Bond  Documents  and the Credit
Facility Documents.

                  In  consideration  of the payment by Tenant to Landlord of the
Basic Purchase  Price and the other amounts of money set forth above,  Landlord,
by special warranty deed, will transfer its interest in the Leased Premises,  as
well as incidental personal property relating to the Leased Premises,  to Tenant
as of the date of the closing of such purchase option, free of all Encumbrances,
other  than  (1)  Encumbrances  in  existence  on the  date of this  Lease,  (2)
Encumbrances  assumed by Tenant,  (3) Encumbrances  approved by Tenant,  (4) the
State Loan  Documents in the event that in  connection  with the purchase of the
Leased Premises by Tenant pursuant to such Purchase Option Tenant assumes all of
Landlord's  obligations  under  the  State  Loan  Documents,  and (5)  the  Bond
Documents and the Credit Facility Documents in the event that in connection with
the purchase of the Leased  Premises by Tenant  pursuant to such purchase option
Tenant  assumes all of Landlord's  obligations  under the Bond Documents and the
Credit Facility Documents;  and Landlord will assign to Tenant all contracts and
warranties (to the extent  assignable)  relating to the Leased  Premises  and/or
incidental to any and all personal property relating to the Leased Premises.

                  Notwithstanding  any other  provision of this Lease,  Landlord
will not  accept  the Basic  Purchase  Price and the other  amounts of money set
forth above, and will not close such purchase  option,  unless the amount of the
Basic Purchase  Price is sufficient to enable  Landlord to (1) redeem all of the
Bonds at the then applicable redemption price, and to pay all of Landlord's Bond
Obligations and Landlord's Credit Facility Obligations in connection  therewith,
unless,  in  connection  with the  purchase  of the  Leased  Premises  by Tenant
pursuant to such  purchase  option,  Tenant  assumes all of the  obligations  of
Landlord under the Bond Documents and the Credit Facility Documents,  or, in the
alternative,  delivers a loan agreement,  or similar  document,  in payment of a
portion of the Basic Purchase Price as set forth above, and (2) to prepay all of
the State Loans in full,  including all accrued and unpaid interest thereon, and
to pay all of the Landlord's  State Loan  Obligations  in connection  therewith,
unless,  and to the extent that, in  connection  with the purchase of the Leased
Premises by Tenant pursuant to such purchase  option,  Tenant assumes all of the
obligations of Landlord under the State Loan Documents.



                                       17
<PAGE>

                  Concurrently   with  the  closing  of  such  purchase  option,
Landlord shall cause the Bond Deed of Trust (if not previously  satisfied) to be
released  upon the  payment by  Landlord to the Trustee of the amounts set forth
above, unless Tenant shall have assumed all of the obligations of Landlord under
the Bond  Documents  and the Credit  Facility  Documents as set forth above,  in
which event the Bond Deed of Trust will not be so released;  and Landlord  shall
cause the State Loan Deed of Trust (if not previously  satisfied) to be released
upon the payment by Landlord to the State of the amounts set forth above, unless
Tenant shall have  assumed all of the  obligations  of Landlord  under the State
Loan Documents as set forth above, or, in the alternative,  shall have delivered
a loan  agreement,  or  similar  document,  in payment of a portion of the Basic
Purchase  Price, as set forth above, in which event the State Loan Deed of Trust
will not be so released.

                  Upon the  closing of such  purchase  option and the payment of
all amounts set forth above,  Tenant shall be released of all of its obligations
under this Lease; provided, however that any and all obligations and liabilities
of  Tenant  under  this  Lease  that  survive  the Term of this  Lease  (such as
indemnification obligations) shall survive the closing of such purchase option.

                  (c) In the event Tenant  exercises  its option to purchase the
Leased Premises from Landlord as set forth above, but fails to close as and when
required as set forth above,  such failure shall  constitute an Event of Default
under this Lease.

         7.       Rent.

                  (a) As used herein,  the term "Rent  Commencement  Date" means
the earlier to occur of (i) the first day of the first month  following the date
on which Tenant gives  written  notice to Landlord,  with a copy of such written
notice to the  Credit  Facility  Provider,  the State and MIDFA,  that  Tenant's
beneficial use of the Leased Premises has begun, and (ii) January 1, 1999.



                                       18
<PAGE>

                  (b) Tenant  covenants to pay to Landlord,  on the first day of
each and every calendar month,  beginning on the Rent  Commencement  Date, basic
rent in the amount of $186,376.00 per month,  subject to adjustment as set forth
in subparagraph (c) below (such basic rent, as so adjusted from time to time, is
hereinafter  referred  to as "Basic  Rent").  Basic  Rent  shall be  payable  to
Landlord by separate check or wire transfer at Landlord's  payment addresses set
forth in Exhibit E attached hereto and made a part hereof or at such other place
or bank account within the continental  United States or to such other Person as
Landlord from time to time may  designate to Tenant in writing,  in lawful money
of the United States of America.

                  (c) Landlord and Tenant  acknowledge  and agree that the Basic
Rent has been  determined  based upon a number of  factors,  which  include  the
amount of debt  service  payable by Landlord  with  respect to the Bonds and the
State Loans and other costs which may fluctuate from time to time.  Accordingly,
the Basic Rent shall be  adjusted  from time to time by  Landlord  and Tenant to
reflect (i) any  redemption of the Bonds prior to maturity and any prepayment of
any of the State Loans prior to maturity,  and (ii) the  expiration of the Hedge
or any default by the Hedge  Counterparty  in the performance of its obligations
under the Hedge Documents.

                  (d) Tenant covenants to pay and discharge, as additional rent,
the following (collectively, the "Additional Rent"):

                           (i) the amount of any cost or expense  required to be
         paid by Landlord with respect to or in connection with the acquisition,
         construction and financing of the Improvements and the ownership of the
         Leased  Premises  and the  leasing  of the Leased  Premises  to Tenant,
         including (without  limitation),  consultants'  fees,  accounting fees,
         legal fees and other expenses relating to any litigation  involving the
         Leased  Premises  (except  to the extent  that  Landlord  is  otherwise
         indemnified  therefor  pursuant to another  provision  of this  Lease),
         costs of maintenance, upkeep and repair of the Leased Premises paid for
         by Landlord, costs of permits, charges by governmental authorities, and
         amounts paid  pursuant to any  declaration  or covenants  including the
         Restrictive Covenants, and all indemnification  obligations of Landlord
         to any  Person  or  Persons  resulting  from  or  growing  out of  such
         acquisition,  construction,  financing,  ownership and leasing, and any
         sales taxes, plus

                           (ii) all fees and amounts  payable by Landlord to any
         Person or Persons in connection with the acquisition,  construction and
         financing  of the  Improvements,  including  (without  limitation)  all
         credit facility fees,  remarketing



                                       19
<PAGE>

         fees, insurance premiums payable to MIDFA, common area maintenance fees
         or rents or other similar  charges  relating to the  maintenance of the
         Leased  Premises  or any roads or  otherimprovements  related  thereto,
         monthly deposits on account of Impositions and insurance  premiums,  in
         the event that  Landlord is required to make such  monthly  deposits on
         account of Impositions and insurance premiums, and amounts representing
         increases in fees payable to the Rating Agency or to the Trustee or the
         Registrar or the Paying Agent pursuant to the Indenture or increases in
         the  negotiation  fee  payable to the  Credit  Facility  Provider,  and
         amounts  representing changes in costs resulting from any conversion of
         the interest  rate payable on the Bonds from a variable  rate to one or
         more fixed  rates or from one or more fixed  rates to one or more other
         fixed rates or to a variable rate, plus

                           (iii) to the extent not paid on the Closing Date from
         the  proceeds of the Bonds,  the amounts  determined  by Landlord to be
         sufficient to enable  Landlord to make  payments of all other  monetary
         obligations of Landlord under the Bond  Documents,  the Credit Facility
         Documents, the State Loan Documents and the Hedge Documents.

Landlord,  as  promptly  as  practicable  after  obtaining  knowledge  that  any
Additional Rent will be payable under this Lease, will advise Tenant, by written
notice,  of the amount of any Additional Rent payable  hereunder and the date on
which any Additional  Rent is due and payable by Tenant in order for Landlord to
meet its  obligations  with  respect to payments  by Landlord to other  Persons.
Additional  Rent  shall be paid to  Landlord's  payment  addresses  set forth in
Exhibit  E  attached  hereto.  In the event of any  failure  by Tenant to pay or
discharge  any  Additional  Rent,  Landlord  shall have all  rights,  powers and
remedies  provided  herein or by Law in the case of  non-payment  of Basic Rent.
Unless otherwise  provided herein,  all payments of Additional Rent shall be due
on the date  specified by Landlord in such  written  notice as the date on which
such Additional Rent is due and payable.

         (e) In the event that any payment of Basic Rent or  Additional  Rent is
not made within 15 days after the date on which the same is due and payable, any
such payment in default and the entire  unpaid  balance of all amounts  owing to
Landlord shall bear  interest,  from the date on which the payment was due until
such payment in default is paid in full, at the fluctuating rate which is at all
times  equal to the LIBOR  Rate  plus 3% per  annum  (the  ADefault  Rate@).  In
addition,  Tenant  shall pay (i) a late  charge  equal to 2% of the  payment  in
default  as set forth  above  (except  for any  payment  with  respect to a Bond
Purchase Principal Drawing,



                                       20
<PAGE>

as defined in the  Indenture)  which is made more than 15 days after the date on
which the same is due and payable,  and (ii) all costs of collection,  including
attorneys=  fees,  if  collection  of amounts  due to Landlord is referred to an
attorney after default by Tenant.

         8.       Net Lease; Non-Terminability.

                  (a) This is a net lease,  and Basic Rent,  Additional Rent and
all other  sums  payable  by Tenant  shall be paid  without  notice  (except  as
specifically provided herein) or demand.

                  (b) Except as expressly  provided in this Lease,  Tenant shall
not be entitled to any set-off, counterclaim, recoupment, abatement, suspension,
deferment,  diminution,  deduction,  reduction or defense of or to Basic Rent or
Additional  Rent or any other sums  payable  hereunder  and the  obligations  of
Tenant under this Lease shall not be  affected,  for any reason,  including  the
following: (i) any damage to or the destruction of all or any part of the Leased
Premises  from  whatever  cause,  (ii) the taking of the Leased  Premises or any
portion thereof or interest  therein by  condemnation,  requisition or otherwise
for any reason, (iii) the prohibition, limitation or restriction of Tenant's use
of all or any part of the Leased Premises,  or any  interference  with such use,
(iv) any title defect or  encumbrance,  or any eviction from the Leased Premises
by paramount  title or otherwise,  (v) Tenant's  acquisition or ownership of any
interest in all or any part of the Leased Premises otherwise than pursuant to an
express  provision  of this  Lease,  (vi) any failure on the part of Landlord to
observe any provision of this Lease,  or any default by Landlord under any other
agreement  to which  Landlord  and Tenant may be parties,  (vii) any claim which
Tenant has or might have  against  Landlord,  or (viii) any other cause  whether
similar  or  dissimilar  to the  foregoing,  any  present  or future  Law to the
contrary notwithstanding except by agreement by and among Landlord,  Tenant, the
State  and  the  Bank.  It is the  intention  of the  parties  hereto  that  the
obligations of Tenant hereunder shall be separate and independent  covenants and
agreements,  that Basic  Rent,  Additional  Rent and all other  sums  payable by
Tenant  hereunder  shall continue to and be payable in all events,  and that the
obligations  of  Tenant   hereunder  shall  continue   unaffected,   unless  the
requirement to pay or perform the same shall have been terminated pursuant to an
express provision of this Lease.

               (c) Tenant agrees that it will remain  obligated under this Lease
in accordance with its terms, and that it will not take any action to terminate,
rescind or avoid this Lease or abate the rent required  hereby,  notwithstanding
(i)  the  bankruptcy,  insolvency,  reorganization,  composition,  readjustment,
liquidation,  dissolution,  winding-up or other proceeding affecting



                                       21
<PAGE>

Landlord or any  assignee of  Landlord  in any such  proceeding  or/and (ii) any
other action (including rejection) with respect to this Lease which may be taken
by any trustee or  receiver  of  Landlord or of any  assignee of Landlord in any
such proceeding or by any court in any such proceeding;  and, in any such event,
so long as Tenant pays and  performs its  obligations  under this Lease and does
not take any action to terminate,  rescind or avoid this Lease or abate the rent
required hereby, Tenant shall be entitled to the benefits of Tenant set forth in
this Lease.

                  (d) Except as otherwise provided in this Lease,  Tenant waives
all rights which may now or hereafter be conferred by law (i) to quit, terminate
or  surrender  this Lease or (ii) to any  abatement,  suspension,  deferment  or
reduction of Basic Rent,  Additional  Rent or any other sums payable  under this
Lease,  except  as  expressly  approved  by the State  and the  Credit  Facility
Provider or as otherwise expressly provided herein.

                  (e) Subject to Paragraph 35(f), Tenant and Landlord agree that
the  State  and the  Credit  Facility  Provider  are and  shall  be  third-party
beneficiaries of this Lease and that, as such, the State and the Credit Facility
Provider  shall  have the right to pursue any right,  remedy or  performance  to
which Landlord shall be entitled  pursuant hereto  notwithstanding  that but for
the  provisions  of this  subparagraph  (e),  the State and the Credit  Facility
Provider  may not have had the  right  to  pursue  any  such  right,  remedy  or
performance.



                                       22
<PAGE>

         9.  Payment  of  Impositions;   Compliance  with  Law  and  Restrictive
Covenants.

                  (a)  Subject to the  provisions  of  Paragraph  18 relating to
contests, Tenant shall pay all Impositions before any fine, penalty, interest or
cost may be added for non-payment.  Tenant agrees to furnish to Landlord, within
30 days after written demand  therefor,  proof of the payment of all Impositions
payable  by Tenant  as  provided  in this  Paragraph  9. In the  event  that any
Imposition  becomes due and payable  during the Term and may be legally  paid in
installments,   Tenant  shall  have  the  option  to  pay  such   Imposition  in
installments;  and in  such  event,  Tenant  shall  be  liable  only  for  those
installments  which  become due and payable  during the Term,  with  appropriate
proration  in  the  case  of  fractional   years.  Any  Impositions   which  are
attributable in part to the Term and in part to a period  preceding or following
the Term, as the case may be, shall be equitably  apportioned  between  Landlord
and Tenant. If Landlord is required pursuant to the Bond Documents or the Credit
Facility  Documents  or the State Loan  Documents  to make  monthly  deposits on
account of Impositions and insurance  premiums,  and Landlord  informs Tenant in
writing  thereof  specifying the amount of such deposits,  Tenant shall pay such
monthly  deposits to  Landlord,  as  Additional  Rent  hereunder  as provided in
Paragraph 7 (d).

                  (b) Tenant shall promptly comply with and conform to all Legal
Requirements concerning the use, occupancy and conditions of the Leased Premises
and all machinery, equipment, furnishings, fixtures and improvements therein. If
any such Legal Requirement requires an occupancy or use permit, license, special
exception,  or other local, state or federal agency  certification,  then Tenant
shall promptly obtain and keep current the same.

                  (c) Tenant shall comply with all of the Restrictive Covenants.



                                       23
<PAGE>

         10.      Liens; Recording and Title; Easements.

                  (a) Tenant will not, directly or indirectly,  create or permit
to remain,  and will promptly  discharge,  at its expense,  any mortgage,  lien,
encumbrance  or  charge  on,  pledge  of,  or  conditional  sale or other  title
retention  agreement with respect to, the Leased Premises or any part thereof or
Tenant's  interest therein or Basic Rent,  Additional Rent or other sums payable
by Tenant under this Lease, other than Permitted  Equipment Liens. The existence
of any mechanic's, laborer's, materialman's, supplier's or vendor's lien, or any
right in respect thereof,  shall not constitute a violation of this Paragraph 10
if  payment is not yet due upon the  contract  or for the goods or  services  in
respect  of which any such lien has  arisen so long as such  payment  is made or
bonded off within 30 days after the later to occur of the completion of the work
which gave rise to the imposition of said liens or the rendering of the invoice,
statement or demand for such payment.  Nothing  contained in this Lease shall be
construed  as  constituting  the consent or request of  Landlord,  expressed  or
implied, of any contractor,  subcontractor, laborer, materialman or vendor to or
for the  performance  of any  labor  or  services  or  other  furnishing  of any
materials for any construction, alteration, addition, repair or demolition of or
to the Leased Premises or any part thereof.

                  (b) At Tenant's request and at Tenant's sole cost and expense,
Landlord and Tenant will execute and deliver a  memorandum  evidencing  Tenant's
option to purchase set forth in Paragraph 6, and shall cause such  memorandum to
be  recorded,  filed or  registered  in such manner and in such places as may be
required  by any  present or future Law in order to publish  notices and protect
the validity of such option to purchase.

                  (c)  Subject  to the terms and  conditions  of  Paragraph  30,
Landlord shall have the right to encumber the Leased Premises, provided that any
such  encumbrance  (except  for the  Deeds of Trust and  other  Credit  Facility
Documents and State Loan Documents) shall be made expressly  subject to Tenant's
rights under this Lease including the purchase option.

         11.  Indemnification.  Tenant shall pay,  protect,  indemnify  and save
harmless  Landlord from and against any and all  liabilities,  losses,  damages,
costs,  expenses  (including  all  reasonable  attorneys'  fees  and  expenses),
penalties,  causes of action, suits, claims,  demands or judgments of any nature
whatsoever  arising  from (i) any  injury to, or the death of, any person or any
damage to property on the Leased Premises or upon adjoining  sidewalks,  streets
or ways, if caused by the negligence of Tenant or its agents or employees, or in
any manner growing out of or connected with the use,  failure of use,  condition
or



                                       24
<PAGE>

occupancy  of the Leased  Premises  or any part  thereof or  resulting  from the
condition  thereof,  (ii) any violation by Tenant of any covenant,  agreement or
condition of this Lease,  and (iii) any  violation by Tenant of the terms of any
contract or agreement  to which  Tenant is a party and which  affects the Leased
Premises;  provided, however, that if any such liability, loss, damage, penalty,
cost or expense,  cause of action,  suit, claim, demand or judgment results from
the  negligence  of  Landlord,  its agents or  employees,  or if any such act or
omission is  determined  to be a failure by Landlord to observe any provision of
this Lease (if observance is required of Landlord),  the foregoing  indemnity by
Tenant shall apply with respect to Landlord  only to the extent of the insurance
coverage  maintained  (or  required  to be  maintained,  if  greater)  by Tenant
pursuant to the provisions of Paragraph 15 of this Lease.  In case any action or
proceeding  is brought  against  Landlord  by reason of any such  claim,  Tenant
covenants,  upon  notice  from  Landlord,  to resist or  defend  such  action or
proceeding by counsel reasonably  satisfactory to Landlord,  and, at the expense
of Tenant,  Landlord will  cooperate and assist in the defense of such action or
proceeding if reasonably requested so to do by Tenant.

         Tenant also shall pay,  protect,  indemnify and save harmless  Landlord
for all amounts,  liabilities,  indemnities and obligations which Tenant assumes
or agrees to pay or discharge pursuant to this Lease, as well as any payments or
indemnification  made or  required  to be  made by  Landlord  under  the  Credit
Facility  Documents,  the Bond Documents,  the State Loan Documents or the Hedge
Documents as a result of Tenant's default  hereunder,  together with every fine,
penalty,  interest  and cost which may be added for  nonpayment  or late payment
thereof.

         The  obligation  of Tenant under this  Paragraph  11 shall  survive any
termination of this Lease as to any right of indemnity  which shall have accrued
prior to such termination.



                                       25
<PAGE>

         12. Tenant's Equipment; Building Equipment; Maintenance and Repair.

         (a) Tenant,  at its expense,  shall install all specialized  machinery,
apparatus and equipment which Tenant, in its sole and absolute discretion, deems
necessary  to  permit  the  Leased  Premises  to be used for the  Permitted  Use
including,  without  limitation,  the Tenant's Equipment  described on Exhibit C
attached hereto.  All Tenant's Equipment shall remain the property of the lessor
thereof or the  property  of the  Tenant,  as  applicable,  notwithstanding  its
attachment  to the  Leased  Premises.  At the  expiration  of the  Term,  all of
Tenant's  Equipment  shall  remain the  property  of the  lessor  thereof or the
property of the Tenant (as  applicable) and shall be removed by Tenant or lessor
in accordance with subparagraph (c) below.

               (b) Tenant, at its sole cost and expense,  will keep and maintain
the Leased Premises,  including any altered, rebuilt,  additional or substituted
buildings,  structures  and  parts  of the  Improvements,  in  good  repair  and
appearance,  except  for  ordinary  wear  and  tear,  and will  with  reasonable
promptness make all structural and nonstructural,  foreseen and unforeseen,  and
ordinary  and  extraordinary  changes and repairs of every kind and nature which
may be required to be made upon or in connection with the Leased  Premises,  the
Building  Equipment,  or any part  thereof;  in order to keep and  maintain  the
Leased  Premises and the Building  Equipment in such good repair and appearance.
All repairs, replacements and renewals shall be at least equal in quality to the
original work and all  replacements  shall have a value and useful life at least
equal to the  value  and  remaining  estimated  useful  life of the  item  being
replaced,  and be suitable for a use which is the same or similar to that of the
item being  replaced.  Landlord  shall not be  required to  maintain,  repair or
rebuild,  or to  make  any  Alteration  to the  Leased  Premises,  the  Building
Equipment,  or Tenant's  Equipment,  or any part  thereof,  whether  ordinary or
extraordinary,  structural  or  non-structural,  foreseen or  unforeseen,  or to
maintain the Leased Premises, the Building Equipment,  or Tenant's Equipment, or
any part thereof,  in any way, and Tenant hereby  expressly  waives the right to
make  repairs at the  expense of  Landlord,  notwithstanding  the fact that such
right may be provided for in any Law in effect at the time of the  execution and
delivery of this Lease or which may thereafter be enacted.

               Notwithstanding anything herein to the contrary, Tenant shall not
be  required to replace any  Building  Equipment  during the last 3 years of the
Term, but Tenant, at Tenant's expense, shall keep all Building Equipment in good
working condition throughout the Term.



                                       26
<PAGE>

               (c) Upon the  expiration  or earlier  termination  of this Lease,
Tenant shall surrender the Leased  Premises in good  condition,  reasonable wear
and tear and damage by casualty  excepted,  with all Building  Equipment in good
working condition,  and all Tenant's  Equipment removed.  Any Tenant's Equipment
required  to be  removed  but not  removed  by Tenant  within 30 days  after the
expiration or earlier termination of this Lease shall be considered abandoned by
Tenant and may be  appropriated,  sold,  destroyed or  otherwise  disposed of by
Landlord  without first giving notice thereof and without  obligation to account
therefor  to either  Tenant or any  lessor of such  Tenant's  Equipment.  Tenant
agrees to pay all costs and expenses incurred in removing, storing and disposing
of  Tenant's  Equipment  required to be removed but not  removed.  Tenant  shall
repair (i.e., replace, restore or repair to a sightly and usable condition),  at
its  expense,  any damage to the Leased  Premises  caused by removal of Tenant's
Equipment,  whether effected by Landlord,  Tenant, or Tenant's lessor.  Landlord
shall not be responsible for any loss or damage to Tenant's  Equipment under any
circumstances. The provisions of this subparagraph (c) are not applicable in the
event that Tenant purchases the Leased Premises as provided in Paragraph 6.

               Notwithstanding anything herein to the contrary, Tenant shall not
be  required to replace any  Building  Equipment  during the last 3 years of the
Term, but Tenant, at Tenant's expense, shall keep all Building Equipment in good
working condition throughout the Term.

               (d)  Landlord  shall,  from  time to time upon  Tenant's  written
request,  execute  appropriate  documents for the benefit of Tenant's lenders or
equipment lessors  confirming the provisions of this Paragraph 12 and containing
such further undertakings of Landlord concerning the right of any such lender or
lessor to enter the Leased Premises following  termination of this Lease for the
purpose of exercising  its rights with respect to the  collateral of such lender
or lessor,  including removing the same, provided such further  undertakings are
on  commercially  reasonable  terms and  conditions  and require  such lender or
lessor to repair  any  damage to the Leased  Premises  caused by the  removal of
Tenant's Equipment.



                                       27
<PAGE>

         13.      Alterations.

                  (a) So long as no Event of  Default or event  which,  with the
giving of  notice,  the lapse of time,  or both,  would  constitute  an Event of
Default shall have occurred and be continuing,  Tenant may, at its expense, make
Alterations,  subject to the advance  written consent of Landlord and subject to
the Deeds of Trust  provided that the consent of Landlord  shall not be required
for non-structural Alterations which do not involve the exterior of the building
or changes in utilities,  electrical,  mechanical or other existing  systems and
which as in each separate  Alteration do not exceed  $500,000 in cost.  Landlord
agrees not to withhold,  delay or condition  its consent  provided  that (i) all
such Alterations,  construction and  installations  shall be performed in a good
and  workmanlike   manner;   (ii)  all  such   Alterations,   construction   and
installations  shall be  expeditiously  completed in  compliance  with all Legal
Requirements;  (iii)  all work  done in  connection  with any such  Alterations,
construction or installation shall comply with the requirements of any insurance
policy required to be maintained by Tenant hereunder; (iv) Tenant shall promptly
pay all costs and expenses of any such Alteration,  construction or installation
and shall discharge all liens filed against any of the Leased Premises  arising,
out of the same;  (v) Tenant shall  procure and pay for all permits and licenses
required in connection with any such  Alteration,  construction or installation;
(vi) all such Alterations, construction and installations (except as provided in
subparagraph 13(c) below) shall be the property of Landlord and shall be subject
to this Lease; (vii) the design of any Alterations  visible from the exterior of
the Leased  Premises  shall comply with the terms of the  Restrictive  Covenants
(including  obtaining any consents required  thereunder);  (viii) the contractor
performing such alterations shall be reputable,  licensed and insured and shall,
if required by Landlord,  be required to obtain  performance  and payment bonds;
and (ix) Landlord shall incur no expense or cost  whatsoever in connection  with
such  Alterations,   including  without  limitation,  costs  for  reviewing  and
approving  plans,  additional  common area  maintenance  fees, tap fees or other
utility  fees,  and costs  incurred by Landlord in obtaining the approval of the
Credit Facility Provider and the State.  Landlord may require, as a condition to
its consent to any Alterations,  reasonable appropriate payments, assurances and
undertakings  from  Tenant to ensure  that all such  conditions  are  satisfied.
Notwithstanding  the  foregoing,  it shall not be  unreasonable  for Landlord to
withhold  its  consent,   or  to  condition  its  consent,   if  either  of  the
Beneficiaries  withholds its consent to any of the  foregoing,  or requires that
certain conditions or requirements be satisfied or observed.

               (b) In the event that any  Alterations  shall  encroach



                                       28
<PAGE>

upon any property,  street or  right-of-way  adjoining or adjacent to the Leased
Premises,  or shall  violate  the  agreements  or  conditions  contained  in any
restrictive covenant affecting the Leased Premises or any part thereof, or shall
hinder or obstruct any easement or right-of-way to which the Leased Premises are
subject  or shall  impair  the  rights of  others  under  any such  easement  or
right-of-way,  then promptly after written  request of Landlord or of any Person
affected  by  any  such  encroachment,   violation,  hindrance,  obstruction  or
impairment,  Tenant shall, at its expense, either (i) obtain valid and effective
waivers or settlements  of all claims,  liabilities  and damages  resulting from
each such encroachment, violation, hindrance, obstruction or impairment, whether
the same shall affect  Landlord,  Tenant or both, or (ii) take such other action
as shall be necessary to remove such  encroachments,  hindrances or obstructions
and to end such violations or impairments.

               (c) All Tenant improvements that can be removed without damage to
the structural  integrity of the Leased Premises or the normal  functions of the
Leased  Premises or that are not necessary for the normal use of a building as a
tenantable shell building,  and which were not financed with the proceeds of the
Bonds or the State  Loans,  shall,  on  termination  of this  Lease,  become the
property of the Tenant.

         14.   Condemnation.

               (a)  Tenant,   immediately   upon  obtaining   knowledge  of  the
institution of any proceeding for any condemnation of the Leased Premises, shall
notify  Landlord  thereof and  Landlord  shall be entitled to  participate  with
Tenant  in any  condemnation  proceeding  at  Tenant's  expense.  Tenant  hereby
irrevocably  assigns to Landlord any condemnation award or condemnation  payment
to which Tenant may be or become  entitled  (except as set forth in subparagraph
(b) below) by reason of any taking of the Leased  Premises or any part  thereof,
in or by condemnation or other eminent domain  proceedings  pursuant to any Law,
or by reason of the temporary  requisition of the use or occupancy of the Leased
Premises or any part thereof, by any governmental authority,  civil or military,
whether  the same shall be paid or payable  in  respect  of  Tenant's  leasehold
interest hereunder or otherwise. The proceeds of the condemnation award shall be
made  available for  restoration  if permitted by the Deeds of Trust and if this
Lease  is not  terminated.  As used  herein,  the term  "Net  Award"  means  any
condemnation award received by Landlord,  less Landlord's  expenses and Tenant's
expenses, if any, in collecting same.

               (b) The  foregoing  notwithstanding,  nothing in this Lease shall
impair  Tenant's  right to any award or payment on  account  of  Tenant's  trade
fixtures, Tenant's Equipment, and other



                                       29
<PAGE>

tangible property, moving expenses, loss of business and the like, if available,
to the  extent  Tenant  shall  have a right to make a  separate  claim  therefor
against the appropriate  governmental authority,  but in no event shall any such
separate  claim be based upon the value of  Tenant's  leasehold  interest in the
Leased  Premises  or result in a reduction  of the award or payment  which would
have been payable to Landlord absent such separate claim by Tenant.

               (c) If there  shall be taken  by  condemnation  or other  eminent
domain  proceedings  pursuant  to any Law,  general or  special,  (i) the entire
Leased Premises or (ii) any substantial  portion of the Leased Premises which is
sufficient to render the remaining portion thereof,  in the reasonable  judgment
of Landlord or Tenant,  unsuitable  for  restoration  for the  continued use and
occupancy of Tenant's business,  or (iii) if the Credit Facility Provider or the
State  shall  retain  any Net  Award  pursuant  to the  Deeds of Trust (it being
recognized that as a result thereof,  either of the  Beneficiaries may refuse to
allow the award to be disbursed for restoration under certain circumstances,  as
provided in the Deeds of Trust),  then  Landlord and Tenant may each,  not later
than 90 days after any such taking, give notice to the other of its intention to
terminate  this Lease on any Basic Rent Payment  Date  specified in such notice,
which date shall not be prior to the date of the  vesting of title to the Leased
Premises or portion thereof in the condemning  authority.  In the event Landlord
elects to  terminate  this Lease in the case of (ii) or (iii)  above,  if Tenant
elects to provide funds which,  together with the Net Award,  are  sufficient to
restore the Leased  Premises and pay Basic Rent and Additional  Rent during such
restoration and provides  evidence  satisfactory to Landlord,  the State and the
Credit Facility Provider (in the Credit Facility Provider's and the State's sole
and  absolute  subjective  judgment)  of its  ability to do so within 30 days of
Landlord's election,  Landlord's election to terminate shall be rescinded,  this
Lease shall continue in full force and effect  pursuant to subsection (d) below,
and  restoration  of the  Leased  Premises  shall  proceed  in  accordance  with
Paragraph 16(b). In the event either Landlord or Tenant elects to terminate this
Lease under the provisions of this Paragraph  14(c),  Landlord shall be entitled
to recover  from  Tenant,  and Tenant will pay to  Landlord,  on or prior to the
effective  date of  termination,  an amount equal to the Basic Rent,  Additional
Rent and other sums  which are then due and  payable  to the  effective  date of
termination; provided that in the event of such termination, Tenant may exercise
its  purchase  option  under  Paragraph  6(b)  within  20 days  after  notice of
termination.

               (d) If a portion of the Leased  Premises  shall be taken in or by
condemnation or other eminent domain proceedings pursuant to any Law, general or
special,  which does not result in a



                                       30
<PAGE>

termination  of this  Lease,  then this Lease  shall  continue in full force and
effect,  and there shall be no abatement or reduction of rent payable hereunder,
except to the extent that any  portion of the Net Award is used to redeem  Bonds
or to prepay the State Loans prior to maturity. Unless Tenant immediately elects
to  exercise  its  purchase  option  under  Paragraph  6 above,  subject  to the
provisions of the Deeds of Trust,  the Net Award of such  condemnation  shall be
paid to Landlord and,  promptly after such  condemnation and payment to Landlord
of the Net  Award,  Landlord  shall make the Net Award  available  to Tenant for
restoration, in accordance with Paragraph 16.

               (e) For the purposes of this Lease,  all amounts payable pursuant
to any agreement with any condemning authority which has been made in settlement
of or under  threat  of any  condemnation  or other  eminent  domain  proceeding
affecting  the Leased  Premises  shall be deemed to  constitute an award made in
such proceeding.

         15.   Insurance.

               (a) Tenant will maintain at its expense (i) such fire,  casualty,
extended  coverage  and all risk  insurance  on the  Improvements  and  Building
Equipment  as is required to be  maintained  by Landlord,  as Grantor  under the
Deeds of Trust,  provided that the amount of any casualty  insurance shall be in
no event less than the actual replacement value of the Improvements and Building
Equipment,  less footings,  foundations and other non-insurable  portions,  (ii)
commercial  general public  liability  insurance with a single limit of not less
than  $10,000,000,   including   contractual  liability  coverage  insuring  the
obligations  assumed  by  Tenant  under  this  Lease,  premises  and  operations
coverage,  broad form  property  damage  coverage  and  independent  contractors
coverage,  (iii)  worker's  compensation  insurance  as  required  by Law,  (iv)
business interruption insurance in the amount of $4,500,000,  and (v) employer's
liability  insurance in an amount not less than  $2,000,000  for each  accident,
$2,000,000 disease- policy limit and $2,000,000 disease-each employee.

               (b) The insurance referred to in Paragraph 15(a) shall be written
by companies of recognized financial standing which are authorized to conduct an
insurance business in the State of Maryland and which are reasonably  acceptable
to Landlord,  the Credit Facility Provider,  MIDFA and the State. All commercial
public  liability  insurance  shall  name  as  the  insured  parties  thereunder
Landlord,  Tenant,  MIDFA, the State and the Credit Facility Provider,  as their
interests  may appear.  Landlord  shall not be required to  prosecute  any claim
against,  or to contest any settlement  proposed by, any insurer,  provided that
Tenant  may,  at its  expense,  prosecute  any such  claim or  contest  any such



                                       31
<PAGE>

settlement.  In such event,  Tenant may bring such prosecution or contest in the
name of Landlord,  Tenant,  or both,  and Landlord will join therein at Tenant's
written  request upon the receipt by Landlord of a  satisfactory  indemnity from
Tenant  against all costs,  liabilities  and  expenses in  connection  with such
prosecution or contest.

               (c) So long as no Event of Default  exists  hereunder,  insurance
claims  by  reason of damage to or  destruction  of any  portion  of the  Leased
Premises  shall be adjusted by Tenant,  but  Landlord,  the State and the Credit
Facility Provider shall have the right to join with Tenant in adjusting any such
loss. In furtherance of Tenant's right to adjust, collect and compromise, in its
discretion,  all claims  under any of the  insurance  policies  required by this
Paragraph 15,  Tenant is authorized to execute and deliver all necessary  proofs
of loss, receipts, vouchers and releases required by the insurers.

                  (d)  Every  fire,  casualty,  extended  coverage  or all  risk
insurance policy required above (other than on Tenant's Equipment) shall contain
a  non-contributory  mortgagee  endorsement  in favor of  Landlord,  the  Credit
Facility  Provider,  the State and MIDFA. Every policy which Tenant is obligated
to carry under the terms of  Paragraph  15(a) shall  contain an agreement by the
insurer that it will not cancel such policy  except after 30 days' prior written
notice to Landlord,  the Credit Facility Provider, the State and MIDFA, and that
any loss otherwise payable thereunder shall be payable  notwithstanding  any act
or negligence of Landlord or Tenant which might,  absent such agreement,  result
in a forfeiture of all or a part of such insurance  payment and  notwithstanding
any  foreclosure  or  other  action  or  proceeding   taken  by  either  of  the
Beneficiaries pursuant to any provision of the Deeds of Trust upon the happening
of an Event of Default,  as defined therein, or any change in title or ownership
of the Leased Premises.

                  (e) Any and all  insurance  which Tenant is obligated to carry
pursuant to Paragraph 15(a) may be carried under a "blanket"  policy or policies
covering  other  properties  or  liabilities  of Tenant and may be effected by a
combination  of basic  and  excess or  umbrella  policies,  provided,  that such
"blanket"  policy or  policies  otherwise  comply  with the  provisions  of this
Paragraph 15. The amount of total  insurance  allocated to the Leased  Premises,
which  amount  shall  not be less than the  amounts  required  pursuant  to this
Paragraph  15, shall be specified  either (i) in each such  "blanket"  policy or
(ii) in a written  statement,  which Tenant shall  deliver to landlord  from the
insurer thereunder.

                  (f) Tenant shall  promptly  comply with and conform to (i) all
provisions of each insurance  policy and (ii) all



                                       32
<PAGE>

requirements  of the insurers  thereunder,  applicable to Landlord,  MIDFA,  the
Credit  Facility  Provider,  the State,  Tenant or the Leased Premises or to the
use, manner of use, occupancy, possession, operation, maintenance, alteration or
repair of the Leased Premises,  even if such compliance  necessitates structural
changes or improvements or results in interference  with the use or enjoyment of
any of the Leased  Premises.  Tenant  shall not use the Leased  Premises  in any
manner  which would  permit the insurer to cancel any  insurance  policy  unless
Tenant obtains,  prior to such cancellation,  substitute insurance in accordance
with the  provisions  of this  Paragraph 15 which permits such use of the Leased
Premises.

               (g) Any loss under any policy of casualty  insurance  required to
be carried by Landlord or Tenant  hereunder  (other than on Tenant's  Equipment)
shall be made payable to the Credit  Facility  Provider or, if references to the
Credit Facility Provider shall be ineffective as provided in Paragraph 35(f), to
the State as long as the State  Loans are  outstanding,  and then to such  other
party as the Landlord may designate (in any such case,  the "Insurance and Award
Trustee")  and each casualty  insurer  shall be authorized  and directed to make
payment  under said  policies  directly to the  Insurance  and Award Trustee for
disbursement in accordance with the provisions of first,  the Bond Deed of Trust
second, the State Loan Deed of Trust, and third, this Lease. As used herein, the
term "Net Proceeds" means any casualty  insurance proceeds received by Landlord,
less Landlord's expenses and Tenant's expenses,  if any, in collecting same. The
term  "Net  Proceeds"  shall not  include  proceeds  of  insurance  on  Tenant's
Equipment, which proceeds shall be paid directly to Tenant or the lessor of such
Tenant's Equipment.

               (h) Tenant shall not carry separate insurance  concurrent in form
or  continuing  in the event of loss with that  required  in this  Paragraph  15
unless (i)  Landlord,  MIDFA,  the State and the Credit  Facility  Provider  are
included therein as named insureds,  with lender's loss payable  endorsements as
provided  herein,  and (ii)  such  separate  insurance  complies  with the other
provisions  of this  Paragraph  15. Tenant shall  immediately  notify  Landlord,
MIDFA, the State and the Credit Facility Provider of such separate insurance and
shall deliver to Landlord,  MIDFA,  the State and the Credit  Facility  Provider
duplicate original policies therefor.  Notwithstanding the foregoing, Tenant may
maintain insurance to compensate Tenant for loss of use of the Improvements.



                                       33
<PAGE>

         16.   Casualty and Restoration.

               (a) In the  event of any  casualty  resulting  in  damage  to the
Leased Premises, including any casualty which renders the entire Leased Premises
or a substantial  portion thereof unsuitable for continued use, this Lease shall
continue in full force and effect and there shall be no  abatement  or reduction
of rent payable hereunder.

               (b)  Until  such  time as the  Deeds of  Trust  shall  have  been
released  and  discharged,  any Net  Proceeds and any Net Award shall be applied
either to the restoration or replacement of the property that was lost or to the
redemption of Bonds and payment of the State Loans,  as provided in the Deeds of
Trust.

               (c) Unless there shall have  occurred and be  continuing an Event
of  Default  hereunder  pursuant  to which  Landlord  is  taking  action to take
possession  of the  Leased  Premises  or to  terminate  this  Lease,  or the Net
Proceeds  or  the  Net  Award  are to be  used  as  directed  by  either  of the
Beneficiaries  as provided in the Deeds of Trust,  Landlord  shall cause the Net
Proceeds  or Net  Award  to be held by the  Insurance  and  Award  Trustee  in a
restoration fund which shall be disbursed as follows:

                  (i)  If  the  estimated  cost  of  restoration  is  less  than
$100,000,  and if prior to commencement  of restoration,  no Event of Default or
event which would  constitute an Event of Default  pursuant to which Landlord is
taking  action to take  possession of the Leased  Premises or to terminate  this
Lease shall exist and no mechanics' or materialmen's liens shall have been filed
and remain undischarged,  and if the architects,  contracts,  contractors, plans
and  specifications  for the  restoration  shall have been  approved by Landlord
(which  approval shall not be  unreasonably  withheld or delayed),  and Landlord
shall be provided with reasonable assurance against mechanics' liens, accrued or
incurred,  as Landlord may reasonably  require,  and acceptable  performance and
payment bonds  reasonably  acceptable to Landlord in an amount and form having a
surety  reasonably  acceptable  to  Landlord,  and naming  Landlord,  the Credit
Facility Provider,  MIDFA and the State each as additional  obligees;  then such
proceeds  shall  be  payable  to  Landlord  and made  available  to  Tenant  for
application to pay the costs of restoration  incurred by Tenant and Tenant shall
promptly complete such restoration.

                  (ii) If the  estimated  cost of  restoration  is  equal  to or
exceeds  $100,000,  and if the  conditions set forth in  subparagraph  (i) above
shall have been  satisfied,  and if Tenant  provides  evidence  satisfactory  to
Landlord,  the Credit  Facility  Provider,  MIDFA and the State that  sufficient
funds are available to restore the Leased Premises,  disbursements shall be made
from



                                       34
<PAGE>

time to time in an amount not exceeding the cost of the work completed since the
date  covered  by the  last  disbursement,  upon  receipt  of  (A)  satisfactory
evidence, including architect's certificates, of the stage of completion, of the
estimated  cost of completion  and of  performance of the work to date in a good
and   workmanlike   manner  in  accordance   with  the   contracts,   plans  and
specifications, (B) waivers of liens, (C) contractors' and subcontractors' sworn
statements,  (D) a satisfactory  bring-to-date of title insurance, and (E) other
evidence  of cost and  payment  so that  Landlord  can verify  that the  amounts
disbursed from time to time are represented by work that is completed,  in place
and free and clear of mechanics' lien claims.

                  (iii) Each request for disbursement  shall be accompanied by a
certificate of Tenant,  signed by the President or any Vice  President  thereof,
describing the work for which payment is requested, stating the cost incurred in
connection therewith and stating that Tenant has not previously received payment
for such work; the  certificate to be delivered by Tenant upon completion of the
work shall,  in addition,  state that the work has been  completed  and complies
with the applicable requirements of this Lease.

                  (iv) Landlord may retain 10% of each  requisition  against the
restoration  fund until the restoration is fully completed  subject to reduction
of the  retained  amount  upon  approval  by the  Credit  Facility  Provider  in
accordance with local custom;

                  (v) The  restoration  fund shall be  invested  in an  interest
bearing account of the Insurance and Award Trustee;

                  (vi) At all times the  undisbursed  balance of the restoration
fund shall be not less than the cost of completing the restoration work free and
clear of all liens; and

                  (vii) Landlord may impose other reasonable conditions provided
the same are consistent with those imposed upon such  disbursements by either of
the Beneficiaries  under the Deeds of Trust. In addition,  prior to commencement
of  restoration  and at any time during  restoration,  if the estimated  cost of
restoration,  as  determined  by  the  evaluation  of  an  independent  engineer
acceptable to Landlord,  exceeds the amount of the Net Proceeds or the Net Award
available for such  restoration,  Tenant will provide  evidence  satisfactory to
Landlord  that the amount of such excess will be available to restore the Leased
Premises.  Any sum which  remains in the  restoration  fund upon  completion  of
restoration  shall be refunded  to Tenant up to the amount of Tenant's  deposits
pursuant to the immediately preceding sentence. If no such refund is required or
any sum remains in the



                                       35
<PAGE>

restoration  fund after such refund,  such sum remaining in the restoration fund
(including  the  residue  of any Net  Award in a  condemnation  remaining  after
restoration)  upon  completion  of  restoration  shall be applied (x) during any
period  in  which  the  Credit   Facility  is  in  effect,   to  the  Landlord's
reimbursement  obligations to the Credit Facility  Provider to the extent of any
drawings  honored by the Bank to pay the  redemption  price of Bonds redeemed in
accordance  with Section 3.1(b) of the Indenture or to pay the purchase price of
Bonds  purchased  pursuant  to Section  4.4 of the  Indenture  or (y) during any
period  in which  any  Bonds  are  outstanding,  to the  redemption  of Bonds in
accordance  with Section  3.1(b) of the Indenture or to the purchase of Bonds as
set forth in Section 4.4 of the Indenture.  During any period in which any Bonds
are  outstanding,  any  sums  remaining  in an  amount  less  than  the  minimum
Authorized  Denomination (as defined in the Indenture) shall be deposited in the
Principal  Account (as defined in the Indenture).  If no Bonds are  outstanding,
and the Credit Facility  Agreement is still in effect,  such remaining sum shall
be  applied  to the  Landlord's  Credit  Facility  Obligations  under the Credit
Facility  Documents.  If no  Bonds  are  outstanding  and  the  Credit  Facility
Agreement is no longer in effect, such remaining sum shall be distributed to the
State for  repayment  of the  State  Loans and then to  Landlord  and  Tenant in
proportion  to the value of each  party's  interest  in the Leased  Premises  as
determined by mutual agreement.

                  (d) Tenant  shall be solely  responsible  for the  replacement
and/or repair of any of Tenant's Equipment damaged by casualty.



                                       36
<PAGE>

         17.      Assignment and Subletting.

                  (a)  Provided  no Event of  Default or event  which,  with the
giving  of notice or the  lapse of time or both,  would  constitute  an Event of
Default,  shall have occurred and be continuing,  with prior notice to Landlord,
Tenant may sublet all or any part of the Leased  Premises  to an  Affiliate,  or
assign this Lease to an Affiliate,  which Affiliate will use the Leased Premises
for the  Permitted  Use.  Provided no Event of Default or event which,  with the
giving  of notice or the  lapse of time or both,  would  constitute  an Event of
Default,  shall have occurred and be  continuing,  with the consent of Landlord,
(which consent shall not be unreasonably  withheld) Tenant may sublet all or any
part of the Leased  Premises to a Person  which is not an  Affiliate,  or assign
this  Lease to a Person  which is not a  Affiliate,  which  Person  will use the
Leased  Premises for the Permitted Use.  Notwithstanding  the foregoing,  in any
instance in which Landlord may not unreasonably  withhold its consent,  it shall
not be  unreasonable  for Landlord to withhold its consent,  or to condition its
consent,  if the Credit  Facility  Provider,  MIDFA or the State  withholds  its
consent to any assignment or subletting,  or requires that certain conditions or
requirements  be satisfied or observed.  Tenant shall give  Landlord at least 30
days'  advance  written  notice of its  intention to enter into any  transaction
governed by this Paragraph 17, together with such  information as Landlord,  the
Credit Facility  Provider,  MIDFA or the State may reasonably request concerning
the business and  financial  background  of the proposed  subtenant or assignee.
Within 10 days after the  execution  and delivery of any  assignment or sublease
permitted  pursuant to this  Paragraph 17, Tenant shall deliver a conformed copy
thereof to Landlord,  and within 10 days after the execution and delivery of any
permitted  sublease,  Tenant shall give notice to Landlord of the  existence and
term thereof, and of the name and address of the sublessee thereunder.

                  (b) If Tenant assigns all its rights and interests  under this
Lease,  the  assignee  under  such  assignment  shall  expressly  assume all the
obligations of Tenant hereunder in a written instrument delivered to Landlord at
the time of such  assignment.  No assignment or sublease  shall affect or reduce
any of the  obligations  of Tenant  hereunder,  and all such  obligations  shall
continue in full effect as  obligations of a principal and not as obligations of
a guarantor or surety,  to the same extent as though no assignment or subletting
had been made.  No  assignment  or  sublease  shall  impose any  obligations  on
Landlord  beyond those of Landlord  under this Lease or otherwise  affect any of
the  rights  of  Landlord  under  this  Lease.  Any  assignment  or  subletting,
Landlord's consent thereto, or Landlord's  collection or acceptance of rent from
any assignee or subtenant shall not be construed  either as waiving or releasing
Tenant  from any of its  liabilities



                                       37
<PAGE>

or  obligations  under this Lease,  or as  relieving  Tenant or any  assignee or
subtenant from the obligation of obtaining  Landlord's  prior written consent to
any subsequent assignment or subletting.

                  (c) Upon the  occurrence  of an Event of  Default  under  this
Lease,  Landlord  shall have the right to collect  and enjoy all rents and other
sums of money  payable  under any  sublease of any of the Leased  Premises,  and
Tenant hereby  irrevocably and  unconditionally  assigns such rents and money to
Landlord,  which assignment may be exercised upon and after (but not before) the
occurrence  of an Event of Default.  From and after the date,  if any, that such
Event of Default is cured,  such rents shall again become  payable to Tenant and
the excess,  if any, of the sublease rents collected by Landlord over the amount
thereof  applied toward Tenant's  obligations  under this Lease shall be paid to
Tenant.

                  (d) All restrictions and obligations  imposed pursuant to this
Lease on Tenant  shall be deemed to extend to any  subtenant  or  assignee,  and
Tenant shall cause such Person to comply with such restrictions and obligations.
Each  sublease is subject to the  condition  that if the Term is  terminated  or
Landlord  succeeds to  Tenant's  interest  in the Leased  Premises by  voluntary
surrender or  otherwise,  at Landlord's  option the subtenant  shall be bound to
Landlord  for the balance of the term of such  sublease  and shall attorn to and
recognize  Landlord  as its  landlord  under  the then  executory  terms of such
sublease.

         18.  Permitted  Contests.  Notwithstanding  any other provision of this
Lease to the contrary,  Tenant shall not be required to (i) pay any  Imposition,
or (ii)  discharge  or remove any lien,  encumbrance  or charge  referred  to in
Paragraph  10 or 12, so long as Tenant shall  contest,  in good faith and at its
expense,  the existence,  the amount or the validity thereof,  the amount of the
damages caused thereby, or the extent of its liability therefor,  by appropriate
proceedings,  provided  that such contest  shall operate at all times during the
pendency  thereof to prevent (i) the collection of, or other  realization  upon,
the sums payable to satisfy any Imposition or lien,  encumbrance or other charge
so contested,  (ii) the sale,  forfeiture or loss of the Leased Premises, or any
part thereof,  or any interest  therein or Basic Rent or any Additional Rent, or
any portion  thereof,  (iii) any  interference  with the use or occupancy of the
Leased Premises or any part thereof,  (iv) any interference  with the payment of
Basic Rent or any Additional Rent, or any portion thereof,  (v) the cancellation
of any fire or other insurance  policy,  unless such policy is replaced prior to
its  cancellation by another policy complying with the provisions of this Lease,
and (vi) the imposition of any civil or criminal liability upon Landlord.  While
any such  proceedings  are  pending,  Landlord  shall not have the right to pay,
remove or cause to be discharged the tax,



                                       38
<PAGE>

assessment,  levy,  fee, rent or charge or lien,  encumbrance  or charge thereby
being  contested,  provided that Landlord shall have the right to require Tenant
to establish  reasonable  reserves for such  liabilities  being contested if the
Landlord  reasonably  determines  such reserves to be necessary.  Tenant further
agrees to give  Landlord  prompt  notice of  Tenant's  intention  to contest any
Imposition  and that each such contest  shall be promptly  prosecuted to a final
conclusion.  Tenant will pay, and save Landlord  harmless  against,  any and all
losses,  judgments,  decrees and costs (including all reasonable attorneys' fees
and expenses) in connection  with any such contest and will,  promptly after the
final  settlement,  compromise or determination  of such contest,  fully pay and
discharge the amounts which shall be levied, assessed,  charged or imposed or be
determined to be payable therein or in connection  therewith,  together with all
penalties,  fines,  interests,  costs  and  expenses  thereof  or in  connection
therewith,  and  perform all acts the  performance  of which shall be ordered or
decreed as a result thereof.

         19.      Default Provisions.

                  (a) Any of the following  occurrences or acts shall constitute
an Event of Default under this Lease:

                           (i) Tenant  fails to pay,  within 5 days after notice
from Landlord to Tenant, any installment of Basic Rent.

                           (ii) Tenant  fails to pay any  payment of  Additional
Rent, or any other payment required to be paid by Tenant  hereunder,  including,
without  limitation,  payment of Impositions  and insurance  premiums,  and such
failure continues for 30 days after written notice thereof shall have been given
to Tenant by Landlord.

                           (iii)  Tenant  fails to observe or perform  any other
provision  hereof for 30 days (or such  shorter  period of time as Landlord  may
reasonably  determine if such default endangers life or property) after Landlord
shall  have  delivered  to  Tenant  written  notice  (except  in the  case of an
emergency) of such failure  (provided that, in the case of any default  referred
to in this clause  (iii)  which does not  endanger  life or  property  and which
cannot  with  diligence  be cured  within such 30 day  period,  if Tenant  shall
proceed  promptly to cure the same and thereafter  shall prosecute the curing of
such default with diligence, then upon receipt by Landlord of a certificate from
an authorized  officer of Tenant  stating the reason that such default cannot be
cured within 30 days and stating  that Tenant is  proceeding  with  diligence to
cure such  default,  the time  within  which such  failure may be cured shall be
extended for such  additional  period as may be necessary to complete the curing
of the same with diligence.



                                       39
<PAGE>

                           (iv) An Act of  Bankruptcy  occurs  with  respect  to
Tenant,  or Tenant becomes generally unable to pay its debts as they become due;
provided, however, if a proceeding with respect to an Act of Bankruptcy is filed
or commenced  against Tenant,  the same shall not constitute an Event of Default
if such  proceeding  is  dismissed  within  90 days from the date of such Act of
Bankruptcy.

                           (v) Default is made (A) with  respect to any evidence
of indebtedness of liability for borrowed money of Tenant to the Credit Facility
Provider,  or (B) with respect to any evidence of  indebtedness  or liability of
Tenant to any other Person for borrowed money or pursuant to a lease obligation,
if the  effect  of such  default  described  in  clause  (A) or (B)  above is to
accelerate the maturity of such evidence of  indebtedness  or liability prior to
its stated maturity (whether automatically,  following an election by the holder
or obligee thereof to accelerate,  or otherwise) or any such indebtedness is not
paid  as and  when  due and  payable;  provided,  however,  that  it  shall  not
constitute  an Event of Default  if the  outstanding  principal  balance of such
indebtedness or liability of Tenant to any Person other than the Credit Facility
Provider or the State is not in excess of $1,000,000 or Tenant  certifies to the
Credit Facility Provider, the State and MIDFA that it is contesting such default
in good faith and by appropriate and diligent proceedings.

                           (vi) Any amendment to this Lease shall have been made
without the prior written consent of the Credit Facility Provider, the State and
MIDFA, which consent shall not be unreasonably withheld, conditioned or delayed,
and, except for material  changes which would require the consent or approval of
the State Board of Public Works or the State Legislative Policy Committee, which
consent  shall be deemed  given by the Credit  Facility  Provider,  the State or
MIDFA if the Credit Facility Provider, the State or MIDFA does not object to any
proposed  amendment  within 15 business  days after the  receipt  thereof by the
Credit Facility Provider, the State or MIDFA.

                           (vii) Tenant abandons the Leased Premises.

                           (viii) The interest of Tenant in the Leased  Premises
or any part thereof shall be assigned or subleased in violation of Paragraph 17,
or shall be levied  upon or  attached  in any  proceeding  involving  a claim in
excess of $1,000,000  and such  proceeding is not vacated,  discharged or bonded
against  to  the  reasonable  satisfaction  of  Landlord,  the  Credit  Facility
Provider, the State and MIDFA within 30 days thereafter.

                           (ix) Any representation or warranty made by Tenant



                                       40
<PAGE>

or its  representatives in this Lease or any of the Lease Documents executed and
delivered  by Tenant or any  statement or  representation  made by Tenant or its
representatives in any certificate, report or opinion (including legal opinions)
financial statement or other instrument  furnished in connection with this Lease
or any of the Lease  Documents  executed and  delivered by Tenant proves to have
been incorrect, false or misleading in any material respect when made.

                           (x) Any judgment  against Tenant or any attachment or
other levy  against the property of Tenant with respect to a claim for an amount
in excess of  $1,000,000  remains  unpaid,  unstayed  on  appeal,  undischarged,
unbonded or undismissed for a period of 60 days.

                           (xi)  Tenant   fails  to  comply  with  any  material
requirement of any governmental  authority having  jurisdiction  over the Leased
Premises  within  the  time  required  by such  governmental  authority;  or any
proceeding is commenced or action taken to enforce any remedy for a violation of
any material requirement of a governmental authority or any restrictive covenant
affecting the Leased Premises or any part thereof;  provided,  however, it shall
not  constitute  an Event of Default if Tenant is  contesting  the  validity  or
applicability of any such requirement or covenant, at its sole cost and expense,
in good faith and by appropriate and diligent proceedings.

                           (xii) If any material  provision of this Lease at any
time for any reason ceases to be valid and binding on Tenant,  or is declared to
be null and void,  or the  validity or  enforceability  thereof is  contested by
Tenant or any governmental agency or authority, or Tenant denies that it has any
further  liability or obligation  under this Lease or any of the Lease Documents
executed and delivered by Tenant.

                           (xiii) Landlord,  the Credit Facility  Provider,  the
State or MIDFA, or any of their respective representatives are not permitted, at
all  reasonable  times (after at least 48 hours prior written  notice to Tenant,
unless an Event of Default  shall have occurred and be continuing in which event
notice will not be required),  to enter upon the Leased Premises, to inspect the
Leased Premises and all materials,  equipment,  fixtures and other items used or
to be used in the construction  thereof, and to examine all detailed plans, shop
drawings and specifications  which relate to or the appurtenances  thereto or to
be used in the operation thereof, provided,  however, any person conducting such
inspection  shall  comply  with  Tenant's  safety  and  operating  policies  and
procedures.

                 (b) If an Event of Default shall have happened and be



                                       41
<PAGE>

continuing,  Landlord shall have the right at its election,  then or at any time
thereafter  while such Event of Default shall  continue,  to give Tenant written
notice of Landlord's  intention to terminate  this Lease on a date  specified in
such  notice  (such  termination  being  hereinafter  referred  to as a "Default
Termination"  and  such  notice  being  hereinafter  referred  to as a  "Default
Termination Notice"). Upon giving a Default Termination Notice, the Term and the
estate  hereby  granted  shall  terminate  on the date  specified in the Default
Termination  Notice as fully and  completely and with the same effect as if such
date were the date  hereinbefore  fixed for the  expiration of the Term, and all
rights of Tenant  hereunder shall  terminate,  but Tenant shall remain liable as
hereinafter  provided.  Notwithstanding  the foregoing,  no Default  Termination
Notice  shall be  effective  unless it is also  executed by the Credit  Facility
Provider and the State and MIDFA.

                  (c)  If an  Event  of  Default  shall  have  happened  and  be
continuing,  Landlord  shall have the immediate  right,  whether or not the Term
shall  have been  terminated  pursuant  to  Paragraph  19(b),  to  re-enter  and
repossess the Leased Premises or any part thereof by force (if legally permitted
in the State of Maryland),  summary proceedings,  ejectment or otherwise and the
right  (subject to the rights and interests of equipment  lessors) to remove all
Persons and property  therefrom.  Landlord shall be under no liability for or by
reason of any such entry, repossession or removal. No such re-entry or taking of
possession of the Leased  Premises by Landlord shall be construed as an election
on Landlord's part to terminate this Lease unless a Default  Termination  Notice
shall  have been given to Tenant,  or unless  the  termination  of this Lease be
finally decreed by a court of competent jurisdiction.

                  (d) At any time or from time to time after the repossession of
the Leased Premises or any part thereof pursuant to Paragraph 19(c),  whether or
not this Lease shall have been terminated pursuant to Paragraph 19(b),  Landlord
shall use  reasonable  efforts to relet the Leased  Premises or any part thereof
for the account of Tenant or Landlord or  otherwise,  without  notice to Tenant,
for such term or terms and on such conditions (which may include  concessions of
free  rent) and for such  uses as  Landlord,  in its  absolute  discretion,  may
determine,  and Landlord may collect and receive any rents  payable by reason of
such  reletting.  Landlord shall not be responsible or liable for any failure to
relet the Leased  Premises or any part thereof or for any failure to collect any
rent due upon any such reletting.

                  (e) In the  event of the  termination  of this  Lease  upon an
Event of Default or  repossession  of the Leased  Premises  or any part  thereof
pursuant to Paragraph 19(c) or otherwise, or the



                                       42
<PAGE>

reletting  of the Leased  Premises or any part  thereof  pursuant  to  Paragraph
19(d), Tenant shall remain liable as hereinafter provided.

                  (f) In the event of any Default Termination or repossession of
the Leased  Premises or any part thereof by reason of the occurrence of an Event
of Default,  Tenant will pay to Landlord Basic Rent,  Additional  Rent and other
sums required to be paid by Tenant to and including the date of such termination
or repossession  (including,  without  limitation,  the amount of all sums which
have become due and payable by Landlord under the Credit Facility  Documents and
the Bond Documents and the State Loan Documents); and, thereafter, Tenant shall,
until  the  end of  what  would  have  been  the  Term  in the  absence  of such
termination or repossession,  and whether or not the Leased Premises or any part
thereof  shall have been  relet,  be liable to  Landlord  for,  and shall pay to
Landlord,  as liquidated and agreed  current  damages on each Basic Rent Payment
Date and on any other date when due and payable: (i) Basic Rent, Additional Rent
and other sums which would be payable  under this Lease by Tenant in the absence
of such termination or repossession,  less (ii) the net proceeds, if any, of any
reletting  effected for the account of Tenant pursuant to Paragraph 19(d), after
deducting  from such proceeds all  Landlord's  expenses in connection  with such
reletting  (including,  without limitation,  all repossession  costs,  brokerage
commissions,  legal expenses,  attorneys' fees, employees' expenses,  alteration
costs and  expenses of  preparation  for such  reletting).  Tenant will pay such
current  damages on the days on which Basic Rent would have been  payable  under
this Lease in the absence of such  termination  or  repossession,  and  Landlord
shall be entitled to recover the same from Tenant on each such day.

                  (g) At any time after a Default Termination, Landlord shall be
entitled to recover from Tenant, and Tenant will pay to Landlord within 120 days
of demand  therefor,  an amount equal to Basic Rent,  Additional  Rent and other
sums which  would be payable  under this  Lease,  from the date to which  Tenant
shall  have  satisfied  in full its  obligations  under  Paragraph  19(f) to pay
current  damages,  to the end of the remaining Term of this Lease in the absence
of such termination (assuming,  in computing the amount of Basic Rent that would
have been due under  Paragraph  7, an  interest  rate which is equal to the rate
applicable to such  obligations  on the date the Default  Termination  Notice is
issued "the "Assumed Rate"),  discounted at the Assumed Rate, or such lower rate
as shall be necessary to provide that the sum payable by Tenant  hereunder shall
satisfy in full the sum of (I) all Landlord's  Credit Facility  Obligations" and
"Landlord's Bond Obligations" and the Landlord's State Loan Obligations  accrued
through  the date of the  payment  due under  this  Paragraph  19(g),  including
without limitation, all accrued fees, costs and expenses



                                       43
<PAGE>

payable to the  Trustee,  Remarketing  Agent,  Rating  Agency,  Credit  Facility
Provider,  plus (II) all costs and expenses (including reasonable attorneys fees
and expenses) of the Credit Facility Provider,  Landlord, MIDFA and the State in
connection with such Default Termination.

                  (h) The words "enter",  "re-enter" or  "re-entry",  as used in
this Paragraph 19, are not restricted to their technical meaning.

         20.      Additional Rights of Landlord.

                  (a) No right or remedy  herein  conferred  upon or reserved to
Landlord  is  intended  to be  exclusive  of any  other  right or  remedy  given
hereunder  or now or  hereafter  existing  at Law or in equity.  The  failure of
either party to insist at any time upon the strict  performance  of any covenant
or agreement or to exercise any option, right, power or remedy contained in this
Lease shall not be  construed  as a waiver or a  relinquishment  thereof for the
future.  A receipt by Landlord of any Basic Rent,  Additional  Rent or any other
sum payable  hereunder with knowledge of the breach of any covenant or agreement
contained  in this  Lease  shall not be deemed a waiver of such  breach,  and no
waiver of any  provision  of this Lease shall be deemed to have been made unless
expressed  in writing  and signed by the  waiving  party.  In  addition to other
remedies  provided  in this Lease,  Landlord  shall be  entitled,  to the extent
permitted by applicable law, to injunctive  relief in case of the violation,  or
attempted  or  threatened  violation,  of  any  of  the  covenants,  agreements,
conditions or provisions of this Lease, or to a decree compelling performance of
any of the covenants, agreements,  conditions or provisions of this Lease, or to
any other remedy allowed to Landlord at Law or in equity.

                  (b) Tenant  hereby  waives and  surrenders,  to the extent not
prohibited  by Law,  for  itself  and all those  claiming  under  it,  including
creditors of all kinds,  (i) any right and privilege which it or any of them may
have under any present or future Law to redeem the Leased  Premises or to have a
continuance  of this Lease for the Term after  termination  of Tenant's right of
occupancy by order or judgment of any court or by any legal  process or writ, or
under the terms of this Lease,  or after the  termination  of the Term as herein
provided,  and (ii) the  benefits  of any  present or future  law which  exempts
property from liability for debt or for distress for rent.

                  (c) In the event Tenant shall be in default in the performance
of any of its obligations  under this Lease,  and an action shall be brought for
the  enforcement  thereof  in which it shall be  determined  that  Tenant was in
default, Tenant shall pay



                                       44
<PAGE>

to  Landlord  all  the  expenses  incurred  in  connection  therewith  including
reasonable  attorney's  fees. In the event Landlord shall,  without fault on its
part, be made a party to any litigation commenced against Tenant, and if Tenant,
at its expense,  shall fail to provide Landlord with counsel reasonably approved
by Landlord,  Tenant shall pay all costs and reasonable attorney's fees incurred
or paid by Landlord in connection with such litigation.

                  (d) If an Event of Default  has  happened  and is  continuing,
Landlord may, but shall not be obligated to, make any payment or perform any act
required  hereunder  to be  made or  performed  by  Tenant  which  has not  been
performed within the time period specified herein for such performance, with the
same  effect  as if made or  performed  by  Tenant,  provided  that no  entry by
Landlord upon the Leased Premises for such purpose shall create any liability to
Tenant on the part of Landlord or shall  constitute  or shall be deemed to be an
eviction of Tenant,  and no such entry  shall  waive or release  Tenant from any
obligation or default hereunder.  All sums so paid by Landlord and all costs and
expenses  (including  reasonable  attorney's  fees  and  expenses)  incurred  by
Landlord in  connection  with the  performance  of any such act,  together  with
interest at the Default Rate, shall constitute Additional Rent payable by Tenant
hereunder.

         21.  Inspection.  Tenant shall  permit  Landlord,  the Credit  Facility
Provider, the State, MIDFA, and the holder of any Encumbrance, and its and their
representatives  and agents to enter the Leased Premises,  with notice to Tenant
and with an escort provided by Tenant, unless (i) an Event of Default shall have
occurred and be continuing,  or (ii) an emergency  threatening  life or property
exists,  in either of which cases, no advance notice shall be required,  without
charge therefor and without  diminution of the rent payable by Tenant,  in order
to examine, inspect and protect the Leased Premises, or, during the last year of
the  Term,  to  exhibit  the  same to  brokers,  prospective  tenants,  lenders,
purchasers  and  others.  In  connection  with any such  entry,  Landlord  shall
endeavor to minimize the disruption to Tenant's  normal  business  operations in
the Leased Premises.

         22.  Notices,  Demands and Other  Instruments.  All  notices,  demands,
requests,  consents,  approvals,  certificates or other communications  required
under this Lease shall be in writing,  and shall be sufficiently given and shall
be deemed to have been  properly  given (i) if delivered  by hand,  when written
confirmation  of delivery  is received by the sender,  (ii) three days after the
same is mailed by certified mail, postage prepaid,  return receipt requested, or
(iii) if sent by overnight courier,  24 hours (plus 24 hours for any intervening
day  that is not a  business  day)  after  delivery  to such  overnight  courier
addressed  to the  Person to whom



                                       45
<PAGE>

any such  notice,  demand,  request,  consent,  approval,  certificate  or other
communication is to be given, at the appropriate address designated on Exhibit E
attached  hereto.  Any party  listed on Exhibit E shall each have the right from
time to time to  specify as its  address  for  purposes  of this Lease any other
address in the United  States of America  upon  giving 15 days'  written  notice
hereunder.

         23.  Estoppel  Certificates.  Landlord  or Tenant,  as the case may be,
shall,  at any time and from  time to time,  upon not less  than 20 days'  prior
written  notice by the other (but  neither  shall be required to do so more than
twice in any calendar year), execute,  acknowledge and deliver to the requesting
party a  statement  in  writing,  executed by an  authorized  representative  of
Landlord or by the President or a Vice President of Tenant,  as the case may be,
certifying  (i) that this Lease is  unmodified  and in full effect (or, if there
have been  modifications,  that this Lease is in full  effect as  modified,  and
setting  forth  such  modifications),  (ii)  the  dates  to  which  Basic  Rent,
Additional Rent and all other sums payable  hereunder have been paid, (iii) that
to the knowledge of the signer of such certificate no default by either Landlord
or Tenant exists  hereunder or specifying  each such default of which the signer
may have  knowledge;  and (iv) that, in the case of any statement being given by
Tenant,  to the  knowledge  of the  signer  of such  certificate,  there  are no
proceedings  pending  or  threatened  against  Tenant  before or by any court or
administrative  agency  which,  if  adversely  decided,   would  materially  and
adversely  affect the financial  condition and  operations of Tenant or Tenant's
ability to perform or fulfill its  obligations  under this Lease, or if any such
proceedings are pending or threatened to said signer's knowledge, specifying and
describing the same. It is intended that any such  statements may be relied upon
by the Credit Facility  Provider,  the State,  Landlord or their assignees or by
any  prospective  purchaser  of the  Leased  Premises  or by any  transferee  or
assignee  of Tenant's  interest in the Lease or a sublessee  of Tenant or by any
party  providing  financing  to  Tenant.  Any  certificate  required  under this
Paragraph 23 shall (i) state briefly the nature and scope of the  examination or
investigation upon which the statements contained in such certificate are based,
(ii) state that in the opinion of each Person  signing such  certificate  he has
made such  examination or investigation as is necessary to enable him to express
an informed  opinion as to the  subject  matter of such  certificate,  and (iii)
certify to the correctness of the statements contained therein.

         24.  No  Merger.  There  shall  be no  merger  of this  Lease or of the
leasehold  estate hereby created with any other estate or interest in the Leased
Premises  or any part  thereof  by reason of the fact that the same  Person  may
acquire or hold,  directly or



                                       46
<PAGE>

indirectly,  (a) any  interest  in this  Lease or the  leasehold  estate  hereby
created or (b) any such other  estate or interest in the Leased  Premises or any
part.

         25.   Representations  and  Warranties  of  Tenant.  Tenant  makes  the
following representations and warranties to Landlord:

                  (a) Good Standing.  Tenant (i) is a corporation duly organized
and existing,  in good standing,  under the laws of the State of Delaware,  (ii)
has the corporate power and all material governmental licenses,  authorizations,
consents and approvals required to own its property and to carry on its business
as now being  conducted,  and (iii) is duly  qualified  to do business and is in
good  standing in each  jurisdiction  in which the  character of the  properties
owned by it  therein  or in which the  transaction  of its  business  makes such
qualification necessary, including, but not limited to, the State of Maryland.

                  (b) Authority.  Tenant has full corporate  power and authority
to enter into and execute and deliver this Lease and each of the other documents
executed  and  delivered by Tenant in  connection  herewith  (collectively,  the
"Lease  Documents"),  and to incur and  perform  the  obligations  provided  for
therein and  herein,  all of which have been duly  authorized  by all proper and
necessary  corporate action by Tenant. No consent or approval of stockholders or
of any other  Person or public  authority  or  regulatory  body is required as a
condition  to the validity or  enforceability  of this Lease or any of the other
Lease Documents, or if required the same has been duly obtained.

                  (c) Binding Agreements. This Lease and each of the other Lease
Documents have been duly and properly  executed by Tenant,  constitute the valid
and legally binding obligations of the Tenant, and are fully enforceable against
Tenant in  accordance  with their  respective  terms;  except to the extent that
enforceability may be affected by any bankruptcy or insolvency  proceeding filed
by or against the Tenant and subject to the exercise of judicial  discretion  in
accordance with general principles of equity.

                  (d) Litigation.  There is no litigation or proceeding  pending
or, so far as  Tenant  knows,  threatened,  before  any court or  administrative
agency which,  in the opinion of Tenant,  will materially  adversely  affect the
financial  condition or  operations of Tenant,  Tenant's  ability to perform and
fulfill its  obligations  under this Lease,  or the authority of Tenant to enter
into, or the validity or enforceability of, this Lease or any of the other Lease
Documents.

                  (e) No  Conflicting  Agreements,  Laws,  etc.  There is



                                       47
<PAGE>

(i) no  charter,  by-law or  preference  stock  provision  of the  Tenant and no
provision of any existing mortgage,  indenture, contract or agreement binding on
the Tenant or affecting Tenant's property,  and (ii) to the knowledge of Tenant,
no provision of Law or order of court  binding on the Tenant or affecting any of
Tenant's  property,  which  would  conflict  with  or in  any  way  prevent  the
execution,  delivery,  or  performance  of the terms of this Lease or any of the
other Lease  Documents,  or which would be in default or violated as a result of
such  execution,  delivery or  performance,  or for which  adequate  consents or
waivers have not been obtained.

                  (f) Tax Returns.  Tenant has filed all required federal, state
and local tax  returns  and has paid all taxes as shown on such  returns as they
have become due. No claims  have been  assessed  and are unpaid with  respect to
such taxes, and Tenant has established reserves which it believes to be adequate
for the payment of additional taxes for years which have not been audited by the
respective tax authorities.

                  (g) Place of Business of Tenant.  Tenant's  principal place of
business is located at 9410 Key West Avenue, Rockville, Maryland 20850.

                  (h)  Brokers.  To the best of Tenant's  knowledge  (other than
Scheer Partners Inc. and Manekin Corporation,  the payment of whose fees are the
responsibility of Montgomery County, Maryland), no Person has, or as a result of
any  action of or by Tenant in  connection  with the  transactions  contemplated
hereby and by the Lease will have, any right, interest or valid claim against or
on the Landlord for any  commission,  fee or other  compensation  as a broker or
finder, or in any similar capacity . Tenant shall indemnify the Landlord against
any claimed fee, commission or other compensation  arising from or in connection
with the transactions contemplated hereby or by the Lease Documents.

                  (i) ERISA.  (i) Any Plan  established  and  maintained  by the
Tenant  or any  Commonly  Controlled  Entity  is a  qualifying  plan  under  the
applicable  requirements  of  Section  401 of the Code and  there is no  current
matter which would materially  adversely affect the qualified  tax-exempt status
of any Plan;  (ii)  neither the Tenant nor any  Commonly  Controlled  Entity has
engaged in or is engaging in any  Prohibited  Transaction  or has  incurred  any
Accumulated  Funding Deficiency in connection with any such Plan, whether or not
waived, and no Reportable Event has occurred with respect to any Plan subject to
the  minimum  funding  requirements  of  Section  412  of  the  Code;  (iii)  no
Multiemployer  Plan has  "terminated",  as that term is defined  in ERISA;  (iv)
neither  the Tenant  nor any  Commonly  Controlled  Entity  has  "withdrawn"  or
"partially withdrawn" from any Multiemployer Plan; and (v) no Multiemployer Plan
is in  "reorganization"  nor has notice been



                                       48
<PAGE>

received from the  administrator  of any  Multiemployer  Plan that any such Plan
will be placed in "reorganization".

         26.      Affirmative Covenants of Tenant. Tenant shall:

                  (a) Financial Statements.  Furnish or cause to be furnished to
Landlord:

                           (i) as soon as available but in no event more than 45
days after the close of each fiscal quarter of Tenant,  a copy of the 10Q Report
of  Tenant  filed  with the  Securities  and  Exchange  Commission  (the  "SEC")
accompanied  by a certificate of the chief  financial  officer of Tenant stating
whether any event has occurred which  constitutes an Event of Default,  or which
would constitute such an Event of Default with the giving of notice or the lapse
of time or both, and, if so, stating the facts with respect thereto; and

                           (ii) as soon as  available  but in no event more than
90 days after the close of each fiscal year of Tenant,  a copy of the 10K Report
of  Tenant  filed  with  the  SEC  and a copy of the  annual  audited  financial
statements  relating to Tenant prepared in accordance with GAAP, which financial
statements  shall include a balance sheet of Tenant as at the end of such fiscal
year and a statement of earnings and changes in  stockholder's  equity of Tenant
for such fiscal year; and

                           (iii) as soon as available  but in no event more than
90 days after the close of each  fiscal  year of Tenant,  a  certificate  of the
chief financial officer of Tenant stating whether any event which constitutes an
Event of  Default  under  this  Lease has  occurred,  or any event  which  would
constitute  such an Event of  Default  with the giving of notice or the lapse of
time or both has occurred,  and, if so, stating the facts with respect  thereto;
and



                                       49
<PAGE>

                           (iv) promptly upon  transmission  thereof,  copies of
any financial  statements,  proxy statements,  reports and the like which Tenant
sends to its  shareholders  and  copies  of all  registration  statements  (with
exhibits); and

                           (v) promptly upon request, access to the registration
materials  submitted to the Federal Drug  Administration (the "FDA") to evidence
the  internal   validation  and   registration  of  the  Leased  Premises  as  a
pharmaceutical-manufacturing  facility, any correspondence, notices and the like
received  from the FDA  relating  to the  initial and  on-going  validation  and
registration of the Leased Premises as a  pharmaceutical-manufacturing  facility
with the FDA and,  promptly upon receipt  thereof,  copies of any  threatened or
actual revocation,  restriction, suspension or expiration of any such validation
and/or registration; and

                           (vi)  with  reasonable  promptness,  such  additional
information,  reports  or  statements  as  the  Landlord,  the  Credit  Facility
Provider, MIDFA or the State may from time to time reasonably request.

                  (b) Taxes and Claims.  Pay and  discharge  or cause to be paid
and  discharged  all taxes imposed upon it or its income or properties  prior to
the date on which  penalties  attach  thereto,  and all lawful claims which,  if
unpaid,  might become a lien or charge upon any of its properties.  Tenant shall
have the right to contest the validity of any such tax, assessment, charge, levy
or claim, by timely and appropriate proceedings,  provided that Tenant shall (1)
give the Landlord  written  notice of its intention to contest,  (2)  diligently
prosecute  such  contest,  (3) at all  times  effectively  stay or  prevent  any
official or judicial  sale of the Leased  Premises or Building  Equipment or any
part  thereof  by reason of  nonpayment  of any such  taxes,  and (4)  establish
reasonable  reserves  for  such  liabilities  being  contested  if the  Landlord
reasonably determines such reserves to be necessary.

                  (c)  Insurance.  In  addition  to the  insurance  required  by
Paragraph  15 of this  Lease,  maintain  insurance  with  responsible  insurance
companies on such of its  properties,  in such amounts and against such risks as
is customarily  maintained by similar businesses operating in the same vicinity.
Tenant  shall file with  Landlord,  upon its  request,  a  detailed  list of the
insurance then in effect  covering Tenant and Tenant's  properties,  stating the
names of the insurance companies, the amounts and rates of the insurance,  dates
of the expiration  thereof and the properties  and risks covered  thereby;  and,
within 30 days after notice in writing from the Landlord, obtain such additional
insurance as the Landlord may reasonably request.



                                       50
<PAGE>

                  (d)  Corporate  Existence.  Maintain  its  existence  in  good
standing as a Delaware corporation,  qualified to transact business in the State
of Maryland.

                  (e) Compliance with Laws. Comply with all Legal  Requirements,
subject to Tenant's right to contest the validity or applicability of any of the
foregoing,  at its sole cost and expense,  in good faith and by appropriate  and
diligent    proceedings,    in    accordance    with    Paragraph   18   hereof.

                  (f) Books and Records.  Maintain appropriate books and records
with respect to the Leased  Premises and permit  access by Landlord,  the Credit
Facility  Provider,   the  State  and  MIDFA  and  their  respective  authorized
representatives  and employees to the books and records of Tenant at the offices
of Tenant during normal business hours.

                  (g)  Employment  Count.  Within 30 days after the Closing Date
and on  each  anniversary  date  thereafter,  and  upon  subsequent  request  of
Landlord,  the State or MIDFA,  the Tenant shall supply the Landlord,  the State
and MIDFA with the employment count at the Leased Premises.

                  (h) Equal Employment.  Tenant shall prohibit discrimination on
the basis of (i) political or religious opinion or affiliation,  marital status,
race,  color,  creed, or national origin, or (ii) sex or age, except when sex or
age constitutes a bona fide occupational qualification, or (iii) the physical or
mental disability of a qualified  individual with a disability;  and shall, upon
the  request  of  MIDFA  or  the  State  Department  of  Business  and  Economic
Development (the  "Department"),  submit information  relating to its employment
practices and operations  with regard to the above on a form to be prescribed by
the State.

                  (i) Drug and Alcohol Free Workplace.  Tenant shall make a good
faith effort to  eliminate  illegal drug use and alcohol and drug abuse from its
workplace during the Term and specifically, shall:

                           (i)    prohibit     the     unlawful     manufacture,
                                  distribution, dispensation, possession, or use
                                  of drugs in its workplace;

                           (ii)   prohibit its employees  from working under the
                                  influence of alcohol or drugs;

                           (iii)  not  hire or  assign  to  work on an  activity
                                  funded in whole or part with State of Maryland
                                  funds,   anyone  whom  it  knows,  or  in



                                       51
<PAGE>

                                  the  exercise of due  diligence  should  know,
                                  currently  abuses  alcohol or drugs and is not
                                  actively engaged in a bona fide rehabilitation
                                  program;

                           (iv)   promptly    inform   the    appropriate    law
                                  enforcement agency of every drug related crime
                                  that  occurs  in  its  workplace  if it or its
                                  employee  has   observed   the   violation  or
                                  otherwise  has  reliable  information  that  a
                                  violation has occurred; and



                                       52
<PAGE>

                           (v)    notify  employees  that drug and alcohol abuse
                                  is banned in the workplace,  impose  sanctions
                                  on  employees  who abuse  drugs and alcohol in
                                  the workplace, and institute steps to maintain
                                  a drug and alcohol free workplace.

                  (j)      Financial Covenants.  Maintain the following:



                                       53
<PAGE>

                           (i)    Unrestricted cash and securities (exclusive of
                                  any unrestricted cash or securities maintained
                                  by a consolidated subsidiary of Tenant) with a
                                  market  value of at least  $50,000,000  at all
                                  times,   of   which   unrestricted   cash  and
                                  securities at least  $10,000,000  (in addition
                                  to the  pledge  described  in  the  Collateral
                                  Pledge  Agreement)  shall be  maintained in an
                                  account  with the Bank or an  affiliate of the
                                  Bank.  The cash and/or  marketable  securities
                                  pledged by Tenant  pursuant to the  Collateral
                                  Pledge Agreement shall be credited against the
                                  foregoing  $50,000,000  requirement.   In  the
                                  event   that   the   market   value   of  such
                                  unrestricted  cash and securities  falls below
                                  $50,000,000,  Tenant shall pledge to Landlord,
                                  as security  for  Tenant's  obligations  under
                                  this   Lease,   in   addition  to  the  pledge
                                  described in the Collateral  Pledge Agreement,
                                  cash and/or marketable  securities  acceptable
                                  to the Bank,  as the assignee of Landlord,  in
                                  its sole  discretion  and margined as required
                                  by the Bank, as the assignee of Landlord, with
                                  a market  value at all times equal to at least
                                  $5,000,000. In the event that the market value
                                  of  unrestricted  cash  and  securities  falls
                                  below  $25,000,000,  Tenant  shall  pledge  to
                                  Landlord, as security for Tenant's obligations
                                  under this  Lease,  in  addition  to any other
                                  pledge  theretofore  made  to  Landlord,  cash
                                  and/or marketable securities acceptable to the
                                  Bank, as the assignee of Landlord, in its sole
                                  discretion  and  margined  as  required by the
                                  Bank,  as assignee of Landlord,  with a market
                                  value   at  all   times   equal  to  at  least
                                  $5,000,000.   Any   cash   and/or   marketable
                                  securities  pledged hereunder shall be held by
                                  the Bank.  Tenant shall deposit with the Bank,
                                  as the assignee of Landlord,  additional  cash
                                  and/or marketable securities acceptable to the
                                  Bank, as the assignee of Landlord, in its sole
                                  discretion  and  margined  as  required by the
                                  Bank,  as the assignee of  Landlord,  whenever
                                  the  market  value of each  additional  pledge
                                  hereunder  falls below  $5,000,000  to make up
                                  the deficiency. Whenever the market value



                                       54
<PAGE>

                                  of  any  cash  and/or  marketable   securities
                                  pledged to Landlord  (margined  as required by
                                  the Bank,  as the  assignee  of the  Landlord)
                                  exceeds the required amount, i.e.,  $5,000,000
                                  or $10,000,000,  as the case may be, the Bank,
                                  as  the  assignee  of  Landlord,   shall,   in
                                  accordance  with the  terms of the  Collateral
                                  Pledge Agreement, release from the pledge cash
                                  and/or  marketable  securities  equal  to such
                                  excess.

                           (ii)   A   "Tangible   Net  Worth"  (as   hereinafter
                                  defined)  with a market value of not less than
                                  $50,000,000.  Tangible  Net  Worth  of  Tenant
                                  shall not  include the  tangible  net worth of
                                  any consolidated  subsidiary of Tenant. In the
                                  event that the market  value of such  Tangible
                                  Net  Worth  falls  below  $50,000,000,  Tenant
                                  shall  pledge to  Landlord,  as  security  for
                                  Tenant's  obligations  under  this  Lease,  in
                                  addition  to  the  pledge   described  in  the
                                  Collateral  Pledge   Agreement,   cash  and/or
                                  marketable  securities acceptable to the Bank,
                                  as the  assignee  of  Landlord,  in  its  sole
                                  discretion  and  margined  as  required by the
                                  Bank,  as the  assignee  of  Landlord,  with a
                                  market  value at all  times  equal to at least
                                  $5,000,000.  In the event  that  Tangible  Net
                                  Worth falls below  $25,000,000,  Tenant  shall
                                  pledge to  Landlord,  as security for Tenant's
                                  obligations  under this Lease,  in addition to
                                  any other pledge theretofore made to Landlord,
                                  cash and/or marketable  securities  acceptable
                                  to the Bank,  as the assignee of Landlord,  in
                                  its sole  discretion  and margined as required
                                  by the Bank, as the assignee of Landlord, with
                                  a market  value at all times equal to at least
                                  $5,000,000.   Any   cash   and/or   marketable
                                  securities  pledged hereunder shall be held by
                                  the Bank.  Monthly,  Tenant shall deposit with
                                  the  Bank,   as  the   assignee  of  Landlord,
                                  additional cash and/or  marketable  securities
                                  acceptable  to the Bank,  as the  assignee  of
                                  Landlord,  in its sole discretion and margined
                                  as  required by the Bank,  as the  assignee of
                                  Landlord,  whenever  the market  value of each
                                  additional   pledge   hereunder   falls  below
                                  $5,000,000 to make up



                                       55
<PAGE>

                                  the  deficiency.  Whenever the market value of
                                  any cash and/or marketable  securities pledged
                                  to Landlord (margined as required by the Bank,
                                  as assignee of Landlord), exceeds the required
                                  amount,  i.e.,  $5,000,000 or $10,000,000,  as
                                  the  case  may be,  quarterly,  the  Bank,  as
                                  assignee of Landlord,  shall  release from the
                                  pledge cash and/or marketable securities equal
                                  to such excess.  Tangible Net Worth shall mean
                                  shareholder's   equity  less  all   intangible
                                  assets such as, but not limited to, good will,
                                  licenses,  trademarks,  patents, copyrights or
                                  consulting agreements.

                           (iii)  Any   pledge   of   cash   and/or   marketable
                                  securities  made pursuant to either clause (i)
                                  or (ii) above shall  satisfy the  requirements
                                  of the other clause.

                           (iv)   Any  investment  earnings  on the cash  and/or
                                  marketable   securities   pledged   by  Tenant
                                  pursuant  to clause (i) or (ii) above shall be
                                  distributed  quarterly  by  the  Bank,  as the
                                  assignee of Landlord, to Tenant.

                           (v)    If  Tenant  pledges  cash  and/or   marketable
                                  securities   to   Landlord   to  satisfy   the
                                  requirements  of  either  clause  (i) or  (ii)
                                  above  and  thereafter  for a  period  of  two
                                  consecutive  fiscal quarters Tenant returns to
                                  compliance   with   the   requirements   which
                                  necessitated  such  pledge,  the Bank,  as the
                                  assignee of Landlord,  shall release such cash
                                  and/or marketable securities from such pledge.
                                  By way of illustration, if the market value of
                                  Tenant's  Tangible  Net Worth  (as  calculated
                                  pursuant  to clause  (ii)  above)  falls below
                                  $25,000,000 and Tenant has pledged $10,000,000
                                  of  cash  and/or   marketable   securities  to
                                  Landlord  and  thereafter  the market value of
                                  Tenant's  Tangible  Net Worth is greater  than
                                  $25,000,000 but less than  $50,000,000 for two
                                  consecutive  fiscal  quarters the Bank, as the
                                  assignee of Landlord,  shall release from such
                                  pledge  $5,000,000  of cash and/or  marketable
                                  securities.

                           (vi)   Notwithstanding  the  foregoing  provisions of


                                       56
<PAGE>

                                  this  subparagraph  26(j),  the amount of cash
                                  and/or  marketable  securities  required to be
                                  pledged  to  Landlord  at any time  shall  not
                                  exceed  the   Stated   Amount  of  the  Credit
                                  Facility (as defined in the Credit Facility).

                  (k) Cooperate in  connection  with any appraisal of the Leased
Premises  conducted  by or at the  request  of  Landlord,  the  Credit  Facility
Provider, the State or MIDFA.

         27.  Negative  Covenants of Tenant.  Until all of Tenant's  obligations
under  this  Lease  have  been  paid  and  performed  in full  (other  than  any
indemnities  which  survive the  termination  of this Lease),  without the prior
written consent of Landlord, Tenant shall not, directly or indirectly:

                  (a) Declare any  dividends  (other than  dividends  payable in
capital  stock of Tenant) on any shares of any class of its capital stock (other
than  preferred  stock  outstanding  on the  Closing  Date) or apply  any of its
property or assets to the purchase,  redemption or other  retirement  of, or set
apart  any  sum  for the  payment  of any  dividends  on,  or for the  purchase,
redemption or other  retirement of, or make any other  distribution by reduction
of capital or otherwise in respect of, any shares of any class of capital  stock
of Tenant  unless (i) there is no Event of  Default  which has  occurred  and is
continuing,  and (ii) the  amount  of the  dividend  does  not  exceed  Tenant's
accumulated earnings at that time.

                  (b) Fail to notify  Landlord  of any  change  in the  officers
(within the meaning of Section 240.16a-1 of the Regulations under the Securities
Exchange Act of 1934, as amended) of Tenant.

                  (c) (i) Restate or amend any Plan  established  and maintained
by Tenant or any Commonly  Controlled  Entity and subject to the requirements of
ERISA, in a manner designed to disqualify such Plan and its related trusts under
the applicable  requirements  of the Code; (ii) permit any officers of Tenant or
any Commonly  Controlled  Entity to  materially  adversely  affect the qualified
tax-exempt  status of any Plan or  related  trusts  of  Tenant  or any  Commonly
Controlled  Facility  under the Code;  (iii)  engage in or permit  any  Commonly
Controlled Entity to engage in any Prohibited Transaction;  (iv) incur or permit
any Commonly  Controlled  Entity to incur any  Accumulated  Funding  Deficiency,
whether  or not  waived,  in  connection  with any Plan;  (v) take or permit any
Commonly  Controlled  Entity to take any



                                       57
<PAGE>

action or fail to take any action  which causes a  termination  of any Plan in a
manner which could result in the  imposition of a lien on the property of Tenant
or any Commonly  Controlled  Entity pursuant to Section 4068 of ERISA; (vi) fail
to notify the Credit  Facility  Provider  that  notice  has been  received  of a
"termination" (as defined in ERISA) of any Multiemployer Plan to which Tenant or
any Commonly  Controlled Entity has an obligation to contribute;  (vii) incur or
permit  any  Commonly  Controlled  Entity to incur a  "complete  withdrawal"  or
"partial  withdrawal" (as defined in ERISA) from any Multiemployer Plan to which
Tenant or any Commonly  Controlled  Entity has an obligation to  contribute;  or
(viii) fail to notify the Credit Facility Provider that notice has been received
from the administrator of any Multiemployer Plan to which Tenant or any Commonly
Controlled  Entity has an obligation  to  contribute  that any such Plan will be
placed in "reorganization" (as defined in ERISA).

         28.   Non-Recourse.   Anything   contained   herein  to  the   contrary
notwithstanding,  any claim based on or in respect of any  liability of Landlord
under this Lease  shall be  enforced  only  against  Landlord's  interest in the
Leased  Premises,  subject to the lien of the Deeds of Trust, and the Collateral
Pledge  Agreement,  and not against  any other  assets,  properties  or funds of
Landlord or against any assets,  properties or funds of (i) any general  partner
or limited  partner of  Landlord,  or any  employee or agent of Landlord (or any
director,  officer, legal representative,  successor, or assign of any thereof),
or (ii) any other Person affiliated with any of the foregoing, including without
limitation,  the State of Maryland or any department,  agency or instrumentality
thereof.

         29.  Separability.  Each and every covenant and agreement  contained in
this Lease is, and shall be construed to be, a separate and independent covenant
and  agreement,  and the breach of any such  covenant or  agreement  by Landlord
shall not  discharge or relieve  Tenant from any of its  obligations  under this
Lease. If any term or provision of this Lease or the application  thereof to any
Person or circumstances  shall to any extent be invalid and  unenforceable,  the
remainder  of this  Lease,  or the  ------------  application  of  such  term or
provision to persons or circumstances other than those as to which it is invalid
or unenforceable,  shall not be affected thereby, and each term and provision of
this Lease shall be valid and shall be enforced to the extent permitted by Law.



                                       58
<PAGE>

         30.      Subordination.

                  (a)  This  Lease  is  subject  and  subordinate  to the  lien,
provisions,  operation  and  effect  of the  Deeds of  Trust  or other  security
instruments which may now or hereafter  encumber the Improvements or the Land or
any  interest  therein   (collectively,   "Encumbrances"),   to  all  funds  and
indebtedness  intended to be secured thereby,  and to all renewals,  extensions,
modifications, recastings or refinancings thereof. The holder of any Encumbrance
to which this Lease is subordinate shall have the right (subject to any required
approval of the holders of any superior Encumbrance) at any time to declare this
Lease to be  superior  to the lien,  provisions,  operation  and  effect of such
Encumbrance,  and Tenant shall  execute,  acknowledge  and deliver all documents
required by such holder in confirmation thereof. Simultaneous with the execution
hereof,  Landlord,  Tenant,  the Credit  Facility  Provider  and the State shall
execute  the  Assignments.  In the event that the  Improvements  and/or the Land
become  subject to an  Encumbrance  after the date  hereof,  Landlord  agrees to
obtain a non-disturbance agreement from the holder of such Encumbrance,  in such
holder's standard form, provided that Tenant shall pay or reimburse Landlord for
any costs  associated  with such efforts and agrees to execute such agreement in
order  to  confirm  the  subordination  of this  Lease  to the  Encumbrance,  if
requested by the holder of such Encumbrance.

                  (b) Tenant shall at Landlord's  request  promptly  execute any
requisite or appropriate  document confirming such subordination.  Tenant waives
the provisions of any Law now or hereinafter in effect which may give or purport
to give Tenant any right to terminate or otherwise  adversely  affect this Lease
and Tenant's  obligations  hereunder in the event any foreclosure  proceeding is
prosecuted or completed or in the event the Improvements, the Land or Landlord's
interest  therein is transferred by foreclosure,  by deed in lieu of foreclosure
or  otherwise.  At the request of such  transferee,  Tenant shall attorn to such
transferee and shall recognize such transferee as the Landlord under this Lease.
Tenant agrees that upon any such  attornment,  such transferee  shall not be (i)
bound by any  payment  of Basic Rent or  Additional  Rent more than one month in
advance,  except  prepayments  in the nature of security for the  performance by
Tenant  of its  obligations  under  this  Lease,  but  only to the  extent  such
prepayments have been delivered to such transferee,  (ii) bound by any amendment
of this  Lease  made  without  the  consent  of the  holder of each  Encumbrance
existing  as of the date of such  amendment,  (iii)  liable for  damages for any
breach, act or omission of any prior landlord, or (iv) subject to any offsets or
defenses which Tenant might have against any prior landlord;  provided, however,
that after succeeding to Landlord's  interest under this Lease,  such transferee
shall agree to perform in



                                       59
<PAGE>

accordance  with the terms of this Lease all  obligations  of  Landlord  arising
after  the  date of  transfer.  Within  five  days  after  the  request  of such
transferee,  Tenant  shall  execute,  acknowledge  and deliver any  requisite or
appropriate document submitted to Tenant confirming such attornment.

                  (c) If any  prospective  or current  holder of an  Encumbrance
requires that  modifications  to this Lease be obtained,  and provided that such
modifications  (i) are  reasonable,  (ii) do not adversely  affect in a material
manner  Tenant's use of the Leased  Premises for the Permitted Use, (iii) do not
increase  the rent  and  other  sums to be paid by  Tenant,  (iv) do not  change
Tenant's  affirmative  or negative  covenants  set forth  herein,  or (v) affect
Tenant's  option to purchase the Leased  Premises as provided in Paragraph 6(b),
then Landlord may submit to Tenant an amendment to this Lease incorporating such
required modifications,  and Tenant shall execute,  acknowledge and deliver such
amendment to Landlord within five days after Tenant's receipt thereof.

         31. Binding  Effect.  All of the covenants,  conditions and obligations
contained  in this Lease  shall be binding  upon and inure to the benefit of the
respective  successors  and assigns of Landlord and Tenant to the same extent as
if each  successor  and assign were in each case named as a party to this Lease.
This Lease may not be changed, modified or discharged except by a writing signed
by Landlord and Tenant and  consented to by the Credit  Facility  Provider,  the
State and MIDFA.

         32. Heading.  The headings to the various paragraphs of this Lease have
been inserted for convenient reference only and shall not to any extent have the
effect of modifying,  amending or changing the expressed terms and provisions of
this Lease.

         33.      Environmental Matters.

                  (a) As used in this  Paragraph 33, the  following  items shall
have meanings set forth below:

                           (i) "CAA" - shall mean the Clean Air Act, codified at
42 U.S.C. " 7401, et seq., as amended.

                           (ii)   "CERCLA"  -  shall   mean  the   Comprehensive
Environmental Response,  Compensation, and Liability Act of 1980, codified at 42
U.S.C. " 9601, et seq., as amended.

                           (iii)  "CWA"  -  shall  mean  the  Clean  Water  Act,
codified at 33 U.S.C. 1251; et seq., as amended.

                           (iv) "Environmental  Laws" - shall mean CERCLA, HMTA,
RCRA, CAA, CWA, TSCA, RHA and the Right-to-Know Act and all



                                       60
<PAGE>

other  federal,  local and  municipal  laws,  statutes,  ordinances  and  codes,
guidelines  and  standards  relating  to  health,  safety,  sanitation,  and the
protection  of  the  environment  or  governing  the  use,  storage,  treatment,
generation,  transportation,  processing,  handling,  production  or disposal of
Hazardous  Materials,   including,  without  limitation,  laws  and  regulations
regarding  the discharge of water or other  materials or fluids into  waterways,
and the rules,  regulations,  guidelines,  decisions,  orders and  directives of
federal, local and municipal governmental agencies,  authorities and courts with
respect  thereto  presently  in  effect or  hereafter  enacted,  promulgated  or
implemented.

                           (v) "Environmental Permits" - shall mean all permits,
licenses, approvals,  authorizations,  consents or registrations required by any
applicable  Environmental  Laws,  on either an  individual  or group  basis,  in
connection with the construction, ownership, use or operation of the Land or the
Improvements, or the storage, treatment, generation, transportation, processing,
handling,  production  or disposal of Hazardous  Materials  related to the Land.

                           (vi)  "Hazardous  Materials"  - shall  mean,  without
limitation,   flammables,  explosives,  radioactive  materials,  asbestos,  urea
formaldehyde foam insulation,  polychlorinated biphenyls, petroleum or petroleum
based or related substances, hydrocarbons or like substances and their additives
or  constituents,  and any  substances  now or hereafter  defined as  "hazardous
substances,"  "extremely  hazardous  substances,"  "hazardous  wastes" or "toxic
chemicals" in CERCLA, HMTA, RCRA, CAA, CWA, TSCA, RHA, the Right-To-Know Act, or
any so-called  "superfund" or  "superlien"  law or the  regulations  promulgated
pursuant thereto,  or any other applicable  federal,  state or local law, common
law,  code,  rule,  regulation,  order,  or  ordinance,  presently  in effect or
hereafter enacted, promulgated or implemented.

                           (vii)  "HMTA" - shall  mean the  Hazardous  Materials
Transportation Act, codified at 49 U.S.C. " 1801, et seq., as amended.

                           (viii) "RCRA" - shall mean the Resource  Conservation
and Recovery Act of 1976,  codified at 42 U.S.C.  " 6901,  et seq.,  as amended.

                           (ix) "Release" - shall have the same meaning as given
to that term in CERCLA, as amended, and the regulations  promulgated thereunder.

                           (x)  "RHA"   shall  mean  the   Rivers  and   Harbors
Appropriation  Act,  codified at 33 U.S.C. " 401, et seq., as amended.



                                       61
<PAGE>

                           (xi)  "Right-To-Know  Act" - shall mean the Emergency
Planning and Community  Right-To-Know  Act,  codified at 42 U.S.C.  " 11001,  et
seq., as amended. 

                           (xii)  "TSCA"  -  shall  mean  the  Toxic  Substances
Control Act, codified at 15 U.S.C. " 2601, et seq., as amended. 

                  (b) Tenant shall comply at all times and in all respects  with
the provisions of all Environmental  Laws and Environmental  Permits,  and shall
not commit  any  actions  or  omissions  that  result in the  incurrence  of any
liability under such  Environmental Laws or Environmental  Permits.  Tenant will
not allow,  cause or permit any Hazardous  Materials to be deposited on or under
the Land,  or otherwise  Released or  threatened  to be Released  from or on the
Land, or otherwise  Released or threatened to be Released from or on the Land or
the Improvements,  by any Person whatsoever except as normally and properly used
in the construction and operation of the Improvements and in compliance with all
Environmental  Laws.  Tenant shall conduct all of its activities on the Land and
Improvements,  including,  without  limitation,  the  off-site  disposal  of any
Hazardous  Materials  originating  on or  from  the  Land  or  Improvements,  in
compliance with all Environmental Laws. Tenant shall obtain,  whenever necessary
and in its own name,  appropriate  Environmental  Permits for its operations and
shall  comply  in all  respects  with  the  requirements  of such  Environmental
Permits.

                  (c) Tenant  hereby  agrees to  indemnify,  hold  harmless  and
defend Landlord, the Trustee, the Credit Facility Provider, the State and MIDFA,
and their partners, officers,  directors, lenders, agents and employees from and
against any and all claims,  losses,  damages,  liabilities,  penalties,  costs,
assessments, expenses, demands, fines or liabilities of whatever kind or nature,
including,  without limitation,  costs, expenses (including expense of posting a
bond) and liabilities  imposed upon Landlord  pursuant to any indenture or other
document, in any way relating to or arising out of:

                           (i) The Release or threat of Release of any Hazardous
Materials in, on, above, from or under the Land or Improvements  during the Term
hereof;

                           (ii) Any  activity by any party on, off or within the
Land  or  Improvements  in  connection  with  the  use,   handling,   treatment,
monitoring, removal, storage, decontamination, clean up, testing, transportation
or disposal of any Hazardous  Materials  located at any time on, within or under
the Land or the Improvements and introduced onto the Land or the Improvements at



                                       62
<PAGE>

any time on or after the commencement of the Term and prior to the expiration or
other termination of this Lease

                           (iii)  The  use,  handling,  treatment,   monitoring,
removal, storage, decontamination, clean-up, testing, transportation or disposal
of any  Hazardous  Materials  on,  under or within the Land or the  Improvements
which were introduced  onto the Land or into the  Improvements at any time on or
after  the  commencement  of the  Term  and  prior  to the  expiration  or other
termination of this Lease;

                           (iv) The  performance  by Tenant or any other  Person
acting on behalf of Tenant  during  the Term of any  inspection,  investigation,
audit, study, sampling,  testing, removal,  containment or other remedial action
or other clean-up related to Hazardous Materials on, above, within,  related to,
or affected by, the Land or the Improvements;

                           (v) The  imposition,  recording or filing of any lien
(including, without limitation, a so-called "superlien") against the Land or the
Improvements as a result of the incurrence by any party of any claims, expenses,
demands,  losses,  costs,  fines or  liabilities of whatever kind or nature with
respect to any actual, suspected or threatened Release of Hazardous Materials or
environmental condition, on, above, within, related to, or affected by, the Land
or the Improvements at any time after the Lease  Commencement  Date and prior to
the expiration or other termination of this Lease; or

                           (vi)  The  violation  by  Tenant  of  any  applicable
Environmental  Laws or  Environmental  Permits  with  respect to the Land or the
Improvements.  The  provisions  of  this  subparagraph  (c)  shall  survive  the
expiration or any other termination of this Lease.

                  (d)  Landlord  has  delivered  to Tenant an undated  "Phase I"
environmental  report referred to as "Phase I Environmental  Assessment  Results
Belward Research Campus, Parcel A, Montgomery County, MD", prepared in June/July
1997 by ManTech  Environmental  Corporation,  as  supplemented  by the  reliance
letter from ManTech Environmental  Corporation dated as of December 23, 1997 and
the  letter  from  Apex  Environmental,  Inc.  dated as of  December  23,  1997,
indicating any presence of any Hazardous  Materials on, above or below the Land,
or of the Release or threat of Release of any Hazardous Materials existing prior
to the commencement of the Term.

                  (e) Unless Tenant purchases the Leased Premises as provided in
Paragraph  6(b),  no less than nine months prior to the  expiration  of the Term
hereof,  Tenant  shall  cause to be  prepared,



                                       63
<PAGE>

by  an  environmental   consultant   reasonably   acceptable  to  Landlord,   an
environmental  assessment of the Land and the Improvements  (the  "Assessment"),
which  shall  identify  the  presence  or  probable  presence  of any  Hazardous
Materials  on,  above or below the Land or the  Improvements,  or the Release or
threat  of  Release  of  any  Hazardous   Materials  or  any  violation  of  any
Environmental  Laws with  respect to the Land and the  Improvements  or Tenant's
operations thereon or therein. To the extent that the Assessment  identifies any
such Hazardous Materials,  Releases or threatened Releases or violations, Tenant
shall take all such measures,  including,  without limitation,  any and all such
measures as shall be recommended by such  environmental  consultant,  to remove,
remedy and/or cure such  condition,  so that, by the end of the Term hereof,  no
Hazardous  Materials shall be present on, above, within or under the Land or the
Improvements, no Release or threat of Release of Hazardous Materials exists, and
no violation of  Environmental  Laws shall exist with respect to the Land or the
Improvements  or  Tenant's  operations  thereon or  therein.  Any such  response
actions   undertaken   by  Tenant  shall   comply  fully  with  all   applicable
Environmental Laws. If Tenant fails to provide the Assessment to Landlord by the
date that is nine months prior to the  expiration  of the Term, or fails to take
such recommended  measures and to remove any Hazardous Materials and comply with
all  Environmental  Laws as aforesaid,  Landlord may, but shall not be obligated
to, have such  Assessment  prepared and such removal  and/or  remedial  measures
undertaken  at the  expense of Tenant,  the costs of which  shall be  considered
Additional Rent hereunder.  The foregoing  provisions of this  subparagraph  (e)
shall survive the  expiration or any other  termination  of this Lease and shall
not be  construed  to relieve  Tenant in any way of its  continuing  obligations
throughout the Term to comply with the provisions of subparagraph (b) above.

                  (f) Unless Tenant purchases the Leased Premises as provided in
Paragraph  6(b), as a condition of any  termination of this Lease,  Tenant shall
cause to be prepared,  by an environmental  consultant  reasonably acceptable to
Landlord,  an Assessment which shall identify the presence or probable  presence
of any Hazardous  Materials on, above or below the Land or the Improvements,  or
the Release or threat of Release of any Hazardous  Materials or any violation of
any Environmental Laws with respect to the Land and the Improvements or Tenant's
operations thereon or therein. To the extent that the Assessment  identifies any
such Hazardous Materials,  Releases or threatened Releases or violations, Tenant
shall take all such measures,  including,  without limitation,  any and all such
measures as shall be recommended by such  environmental  consultant,  to remove,
remedy and/or cure such  condition,  so that, as soon as  practicable  after the
termination of this Lease,  no Hazardous  Materials  shall be present on, above,
within or under the Land or the Improvements, no Release or threat



                                       64
<PAGE>

of Release of Hazardous Materials exists, and no violation of Environmental Laws
shall exist with respect to the Land or the Improvements or Tenant's  operations
thereon or therein.  Any such response actions undertaken by Tenant shall comply
fully  with all  applicable  Environmental  Laws.  If Tenant  fails to engage an
environmental  consultant to provide the  Assessment to Landlord  within fifteen
(15) days of the event which  causes or permits  termination  of this Lease,  or
fails to take such  recommended  measures and to remove any Hazardous  Materials
and comply with all Environmental Laws as aforesaid, Landlord may, but shall not
be obligated to, have such Assessment  prepared and such removal and/or remedial
measures  undertaken  at the  expense  of  Tenant,  the costs of which  shall be
considered   Additional  Rent  hereunder.   The  foregoing  provisions  of  this
subparagraph  (f) shall survive the expiration or any other  termination of this
Lease and shall not be construed to relieve  Tenant in any way of its continuing
obligations  throughout the Term to comply with the  provisions of  subparagraph
(b) above.

         34. Quiet Enjoyment.  So long as no Event of Default exists  hereunder,
and subject to the terms of this Lease, the Deeds of Trust, any Encumbrance, and
any other matters of record, Landlord warrants peaceful and quiet occupation and
enjoyment  of the Leased  Premises by Tenant,  free of  hindrance by Landlord or
anyone claiming by or through Landlord.

         35.      Miscellaneous.

                  (a) This Lease may be executed in any number of  counterparts,
each of which shall be an original,  but all of which shall together  constitute
one and the same instrument.

                  (b) References to the masculine shall include the feminine and
neuter and the plural shall include the singular, as the context may require.

                  (c) This Lease shall be construed  and enforced in  accordance
with the Law of the State of Maryland.

                  (d) Time is of the  essence  with  respect  to each and  every
provision of this Lease.

                  (e) With respect to any provision of this Lease which requires
Landlord to not unreasonably  withhold its consent or approval, if in connection
therewith  Landlord is obligated  under the Deeds of Trust,  the Credit Facility
Documents,  the Bond  Documents,  the State Loan  Documents or applicable Law to
obtain the  consent or  approval  of MIDFA,  the  Trustee,  the Credit  Facility
Provider, the State or any other third party, then Landlord's failure to provide
consent or failure to otherwise act in a



                                       65
<PAGE>

reasonable  manner because of its inability to obtain the consent or approval of
Landlord,  MIDFA, the Credit Facility  Provider,  the State or other third party
shall not be deemed  unreasonable,  so long as  Landlord  has made a good  faith
effort to obtain such consent.

                  (f) Upon the satisfaction of the Deeds of Trust, references in
this Lease to the Credit Facility Provider,  the Trustee,  MIDFA, the State, the
Credit  Facility,  the  Credit  Facility  Agreement,  the Deeds of Trust and the
Credit Facility  Documents  shall be ineffective,  and Tenant shall no longer be
obligated to comply with the covenants  contained in Paragraphs  26(g), (h), (i)
or (j) and in Paragraph 27.

                  (g) The parties hereto acknowledge that the provisions of this
Lease have been  tailored  to  specific  financing  accommodations  provided  by
Landlord, the Credit Facility Provider, MIDFA and the State, including the Bonds
and the Credit  Facility  pursuant  to the terms of the Bond  Documents  and the
Credit Facility  Documents.  In the event it becomes necessary to replace all or
any portion of these accommodations,  Landlord shall exert good faith efforts to
obtain  financing  on the best terms  available.  Landlord  and Tenant  agree to
negotiate in good faith to amend this Lease to re-tailor this Lease to suit such
replacement financing, upon terms mutually agreeable to Landlord, Tenant and the
financial  institution  providing or  participating  in such financing and it is
acknowledged  and agreed that  Tenant's  rental  obligations  hereunder  will be
restructured to provide for the payment of all interest and all related expenses
of such  replacement  financing in the event such interest and related  expenses
under the  replacement  financing  are not  identical to those payable under the
Bonds and the  Credit  Facility  Documents  and the State  Loan  Documents.  The
parties hereto also acknowledge that in the event it becomes necessary to obtain
replacement financing for any reason other than (i) Landlord's  misappropriation
of funds or (ii) a default by Landlord  hereunder or under the Bond Documents or
the Credit  Facility  Documents not caused  directly or indirectly by the act or
omission of Tenant,  all expenses  incurred by Landlord in connection  with such
replacement financing shall be paid by Tenant as Additional Rent.

                  (h)  Landlord  and Tenant  hereby  agree and consent  that any
action or proceeding arising out of or brought to enforce the provisions of this
Lease may be brought in any appropriate court in Montgomery County,  Maryland or
Baltimore City, Maryland, and by the execution of this Lease Landlord and Tenant
irrevocably consent to the jurisdiction of each such court.

                  (i) If for any reason  Landlord  or Tenant  should  become not
qualified  to do  business in the State,  Landlord  and Tenant



                                       66
<PAGE>

hereby agree to designate and appoint, without power of revocation, an agent for
service of process  within the State,  as the agent for  Landlord or Tenant,  as
applicable,  upon whom may be served  all  process,  pleadings,  notice or other
papers which may be served upon Landlord or Tenant,  as applicable,  as a result
of any of Landlord's or Tenant's, as applicable, obligations under this Lease.

                  (j) Landlord and Tenant  covenant that throughout the Term, if
a new agent for service of process  within the State is  designated  pursuant to
the terms of subparagraph  (i) above,  Landlord or Tenant,  as applicable,  will
immediately  file with the other  party  hereto the name and address of such new
agent and the date on which such appointment is to become effective.

                  (k) Landlord and Tenant hereby  jointly waive trial by jury in
any action or  proceeding to which  Landlord and Tenant may be parties,  arising
out of or in any way  pertaining  to  this  Lease.  This  waiver  is  knowingly,
willingly  and  voluntarily  made by Landlord  and Tenant,  each of which hereby
represents  that no  representations  of fact or  opinion  have been made by any
individual  to induce  this  waiver of trial by jury or to in any way  modify or
nullify its effect.  Each of Landlord and Tenant further  represents that it has
been  represented  in the signing of this Lease and in the making of this waiver
by independent legal counsel, selected of its own free will, and that it has had
the opportunity to discuss this waiver with counsel.

                  (l)  Landlord  has issued the Bonds to,  inter alia,  fund the
costs of construction of the Improvements,  and has created with the Trustee the
Facility Fund to pay for  construction  and other  construction and Bond related
expenses.  The Facility Fund is to be invested per  Landlord's  instructions  in
accordance with the Indenture.  In addition, with respect to the Bonds, Landlord
agrees that Landlord, upon Tenant's request, shall agree to procure a substitute
Credit Facility upon terms and conditions mutually  satisfactory to Landlord and
Tenant.

         IN WITNESS  WHEREOF,  Landlord  and Tenant have caused this Lease to be
signed on their behalf,  under seal, by their respective  signatories  thereunto
duly organized as of the date first above written.

WITNESS/ATTEST:                           MARYLAND ECONOMIC DEVELOPMENT

                                          CORPORATION, Landlord

                                          By:                             (SEAL)
- -----------------------------------------    -----------------------------
                                               Hans F. Mayer
                                               Executive Director



                                       67
<PAGE>

                                          HUMAN GENOME SCIENCES, INC.,
                                          Tenant

                                          By:                             (SEAL)
- -----------------------------------------    -----------------------------
                                               Steven C. Mayer
                                               Senior Vice President
                                               and Chief Financial Officer


                                       68
<PAGE>

                                                                       EXHIBIT A
                                                                       ---------
                               DESCRIPTION OF LAND
                               -------------------

         Lot Number 1, in Block A in the subdivision known as "Lots 1 & 2, Block
A, Lot 1,  Block B, Lots 1 & 2,  Block C, THE  JOHNS  HOPKINS  BELWARD  RESEARCH
CAMPUS",  as per plat  thereof duly  recorded in the Land Records of  Montgomery
County, Maryland in Plat Book 186 at Plat 20556.







                                      A-1


<PAGE>



                                                                       EXHIBIT B
                                                                       ---------

                         LIST OF CONSTRUCTION CONTRACTS
                         ------------------------------

         1.  Construction  Management  Agreement dated August 27, 1997,  between
Gilbane  Building  Company and MEDCO  (captioned  "Agreement  Between  Owner and
Construction Manager where the Construction Manager is also the Constructor").

         2.  Engineering  and  Procurement  Services  Agreement dated August 11,
1997, between Fluor Daniel, Inc. and MEDCO, as amended by Contract Amendment No.
1, dated August 20, 1997, and Contract  Amendment No. 2, dated as of October 13,
1997.

         3. Site Development Contract dated as of July 24, 1997, between Manekin
Corporation and MEDCO (captioned  "Abbreviated  Form of Agreement  Between Owner
and  Contractor  for  Construction  Project of Limited  Scope where the Basis of
Payment is a Stipulated Sum").



                                      B-1

<PAGE>



                                                                       EXHIBIT C
                                                                       ---------

                           LIST OF TENANT'S EQUIPMENT
                           --------------------------












                                      C-1

<PAGE>



                                                                       EXHIBIT D
                                                                       ---------

                       SCHEDULE OF OPTION PURCHASE PRICES
                       ----------------------------------



















                                      D-1

<PAGE>



                                                                       EXHIBIT E
                                                                       ---------

                          NOTICE AND PAYMENT ADDRESSES
                          ----------------------------

If to Landlord:

         Notices:             Maryland Economic Development
                               Corporation

                              36 South Charles Street
                              Suite 2410
                              Baltimore, Maryland 21202
                              Attention: Hans F. Mayer,
                                         Executive Director

                              with a copy to:

                              S. Nelson Weeks, Esquire
                              Ballard Spahr Andrews & Ingersoll
                              300 East Lombard Street
                              19th Floor
                              Baltimore, Maryland 21202

                              George W. Liebmann, Esquire
                              8 West Hamilton Street
                              Baltimore, Maryland 21201

         Payments:            Basic Rent

                              By Electronic Transfer:

                              The First National Bank of Maryland
                              Baltimore, Maryland 21203
                              Account No. 191 1047 0

                              By Mail:

                              MEDCO

                              36 South Charles Street
                              Suite 2410
                              Baltimore, Maryland 21202
                              Attention: Hans F. Mayer
                                         Executive Director

                                      E-1

<PAGE>

If to Tenant:

         Notices:             Human Genome Sciences, Inc.
                              9410 Key West Avenue
                              Rockville, Maryland 20850
                              Attention: Steven C. Mayer
                                         Senior Vice President
                                         and Chief Financial Officer

                              with a copy to:

                              James H. Davis
                              Senior Vice President and General

                                 Counsel and Secretary
                              Human Genome Sciences, Inc.
                              9410 Key West Avenue
                              Rockville, Maryland 20850

If to the Bank:

         Notices:             If by mail:

                              The First National Bank of Maryland
                              6303 Ivy Lane
                              Suite 200
                              Greenbelt, Maryland 20770
                              Attention: Joseph C. LeMense
                                         Vice President

                              The First National Bank of Maryland
                              International Operations
                              P.O. Box 17086
                              Mail Code 101-492
                              Baltimore, Maryland 21203
                              Attention: Phyllis Malekiania

                              Otherwise:

                              The First National Bank of Maryland
                              6303 Ivy Lane
                              Suite 200
                              Greenbelt, Maryland 20770
                              Attention: Joseph C. LeMense
                                         Vice President

                              The First National Bank of Maryland
                              International Operations
                              25 South Charles Street
                              15th Floor
                              Baltimore, Maryland 21201


                                      E-2

<PAGE>

                              Attention: Phyllis Malekiania

                              with a copy to:

                              John A. Stalfort, Esquire
                              Miles & Stockbridge, a Professional
                              Corporation
                              10 Light Street, 8th Floor
                              Baltimore, Maryland 21202


                                      E-3

<PAGE>



If to MIDFA:

         Notices:                      Maryland Industrial Development
                                         Financing Authority
                                       217 East Redwood Street
                                       Redwood Tower, 22nd Floor
                                       Baltimore, Maryland 21202
                                       Attention: Executive Director

If to State:

         Notices:                      Department of Business and Economic
                                       Development
                                       217 East Redwood Street, 22nd Floor
                                       Baltimore, Maryland 21202
                                       Attention: Director of Community
                                                  Financing Group Programs




                                      E-4





                                                                    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  23,  1998,  with  respect to the
financial  statements of Human Genome Sciences,  Inc.  included in the Form 10-K
for the year ended December 31, 1997.

                                                           /s/ Ernst & Young LLP

Vienna, Virginia
March 27, 1998



                                                                    EXHIBIT 23.2


               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 23,
1998, with respect to the financial  statements of Human Genome  Sciences,  Inc.
included in the Form 10-K for the year ended December 31, 1997.

                                                           /s/ Ernst & Young LLP

Vienna, Virginia
March 27, 1998



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