Document:

Exhibit 10.1

                                                    Dated as of January 31, 2004

I. Craig Henderson, M.D. c/o ACCESS Oncology, Inc. 730 Fifth Avenue, Ninth Floor
New York, NY 10019

Dear Dr. Henderson:

                  This letter agreement will confirm your employment
("Executive" or "you") with Keryx Biopharmaceuticals, Inc. (the "Corporation"),
under the following terms and conditions and for the following consideration:

         1. Term of Agreement; Compensation. (a) This agreement shall continue
until January 31, 2007 (the "Employment Term"), unless terminated at an earlier
date in accordance with the provisions of Section 9, below. In addition, the
Employment Term shall be automatically renewed for a period of two years on each
expiration date unless either party provides six months prior written notice of
non-renewal to the other party. This agreement supercedes the employment
agreement between you and ACCESS Oncology, Inc. dated January 1, 2001.

         (b) Executive shall be paid $250,000 per year (the "Base Salary"),
payable on a bi-monthly basis in arrears; provided that Executive's Base Salary
shall be increased annually in accordance with corporate policy but no less than
the Consumer Price Index announced for the previous calendar year.

         (c) Executive shall be entitled to an annual performance bonus of up to
50% of the Base Salary (the "Performance Bonus") based on annual target
performance objectives to be agreed upon by the Corporation's Chief Executive
Officer (the "CEO") and the Executive on or before the December 15 immediately
preceding fiscal year for which the Performance Bonus shall be applicable,
except in the first year of this agreement, which shall be on or before February
15.

         (d) You shall receive, options (the "Options") to purchase shares of
common stock of the Corporation as outlined on Exhibit B.

         (e) From time to time, at the discretion of the Board of Directors, you
may be eligible for additional stock option grants.

         2. Position and Responsibilities. Subject to the terms and conditions
set forth herein, the Corporation hereby engages and employs the Executive, and
the Executive hereby accepts engagement and employment, as President of the
Corporation. As such he shall be have such responsibilities and duties as
delegated by the CEO. Executive shall report directly to the CEO.

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         (b) Executive will devote substantially all of his gainful time to the
discharge of his duties and responsibilities under this Agreement.

         (c) Executive acknowledges and agrees that the performance by Executive
of his duties hereunder may require significant domestic and international
travel by Executive.

         (d) Additionally, Executive shall be appointed to the Board of
Directors of the Corporation at the next in-person Board meeting.

         3. Vacation. Executive shall be entitled to four (4) weeks of paid
vacation during each calendar year.

         4. Non-Competition. Executive understands and recognizes that his
services to the Corporation are special and unique and agrees that, during the
Employment Term and for a period of one (1) year from the date of termination of
the Employment Term, Executive shall not in any manner, directly or indirectly,
on behalf of Executive or any person, firm, partnership, joint venture,
corporation or other business entity ("Person"), enter into, engage in or
consult for any commercial business that operates a proprietary product
development business, a clinical research business, site management
organization, and/or clinical research network , in each case which is
competitive with the business of the Corporation, either as an individual for
his/her own account, or as a proprietor, partner, member, joint venturer,
employee, consultant, agent, salesperson, officer, director or shareholder (the
"Restricted Businesses") within the geographic area of the Corporation's
business; provided, however, that nothing shall prevent the Executive from
purchasing shares of any company in the public market or for working for a
company that conducts a Restrictive Business, so long as Executive works in a
division of such company that is not engaged in a Restricted Business. Executive
acknowledges and agrees that given the services to be provided hereunder that
this non-compete clause is reasonable. Notwithstanding the foregoing, the
Corporation acknowledges that Executive has continuing obligations to Alza
Corporation and to certain other pharmaceutical companies, medical
communications companies and internet-based companies to perform certain
advisory and speaker activities, and the Corporation explicitly agrees that
those activities are outside of this non-compete agreement.

         5. Confidential Information. (a) Executive agrees that during the
course of the Employment Term or at any time after termination, Executive will
keep in strictest confidence and will not disclose or make accessible to any
other person without the prior written consent of the Corporation, the
Corporation's products, services, business plan, manner of doing business and
technology, both current and under development, promotion, marketing and
educational programs, customer and other lists, trade secrets and other
confidential and proprietary business information of the Corporation or any of
its clients and third parties including, without limitation, Proprietary
Information (as defined in Section 6) (all the foregoing collectively being
referred to herein as the "Confidential Information"). Executive agrees: (i) not
to use any such Confidential Information for himself or others, (ii) not to
disclose or publish any of the Confidential Information and (iii) not to take
any such material or reproductions thereof from the Corporation's facilities at
any time during the Employment Term except, in each case, as required in
connection with Executive's duties to the Corporation.

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         (b) Upon written notice by the Corporation, Executive shall promptly
redeliver to the Corporation, or, if requested by the Corporation, promptly
destroy all written or electronic Confidential Information and any other written
or electronic material containing any information included in the Confidential
Information (whether prepared by the Corporation, Executive, or a third party),
and will not retain any copies, extracts or other reproductions in whole or in
part of such written or electronic Confidential Information (and upon request
certify such redelivery or destruction to the Corporation in a written
instrument reasonably acceptable to the Corporation and its counsel).

         6. Ownership Of Proprietary Information. (a) Executive agrees that all
information, materials and/or inventions created, discovered or developed by
Executive under this Agreement (collectively, the "Inventions"), by the
Corporation, its subsidiaries, affiliates or licensors or made known to the
Corporation or any of its affiliates by Executive during the Employment Term and
information relating to the Corporation's customers, suppliers, consultants, and
licensees, and/or in which property rights have been assigned or otherwise
conveyed to the Corporation or its affiliates, shall be the sole property of the
Corporation or the affiliates, as applicable, and the Corporation or the
affiliates, as the case may be, shall be the sole owner of all patents,
copyrights and other rights in connection therewith, including without
limitation the right to make application for statutory protection. All of the
aforementioned information is hereinafter called "Proprietary Information." By
way of illustration, but not limitation, Proprietary Information includes web
pages, computer programs, trade secrets, processes, discoveries, structures,
inventions, designs, ideas, works of authorship, copyrightable works,
trademarks, copyrights, formulas, data, know-how, show-how, improvements,
inventions, product concepts, techniques, information or statistics contained
in, or relating to, marketing plans, strategies, forecasts, blueprints,
sketches, records, notes, devices, drawings, customer lists, patent
applications, continuation applications, continuation-in-part applications, file
wrapper continuation applications and divisional applications and information
about the Corporation's or its affiliates' employees and/or consultants
(including, without limitation, the compensation and job responsibility of such
employees and/or consultants).

         (b) Executive shall maintain and furnish to the Corporation complete
and current records of all such Inventions and disclose to the Corporation in
writing all such Inventions. Executive: (i) hereby assigns, sets over and
transfers to the Corporation all of his right, title, and interest in and to
such Inventions; and (ii) agrees that Executive and his agents shall, during and
after the period Executive is retained by the Corporation, upon reasonable
request of the Corporation, cooperate fully in obtaining patent, trademark,
service mark, copyright or other proprietary protection for such Inventions, all
in the name of the Corporation (but only at Corporation expense), and, without
limitation, shall execute all requested applications, assignments and other
documents, and take such other measures as the Corporation shall reasonably
request in order to perfect and enforce the Corporation's rights in such
Inventions, and hereby appoints the Corporation as Executive's attorney to
execute and deliver any such applications, assignments or other documents on
Executive's behalf in the event that the Executive fails or refuses to execute
and deliver any such applications, assignments or other documents requested by
the Corporation.

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         (c) In addition, Executive agrees to execute the Corporation's standard
form Proprietary Information and Inventions Agreement.

         7. Non-Solicitation. During the Employment Term, and for one (1) year
thereafter, Executive shall not, directly or indirectly, without the prior
written consent of the Corporation: (a) interfere with, disrupt or attempt to
disrupt any past, present or prospective relationship, contractual or otherwise,
between the Corporation and any of its licensors, licensees, clients, customers,
suppliers, employees, consultants or other related parties, or (b) solicit or
induce for hire any of the employees, agents, consultants or advisors of the
Corporation or any such individual who in the past was employed or retained by
the Corporation, within six (6) months of the termination of said individual's
employment or retention by the Corporation; provided, however, that this
prohibition shall not apply to consultants or advisors so long as Executive is
not in violation of his non-compete agreement and such consultants and advisors
do not terminate their relationship with the Corporation as a result of their
involvement with the Executive, or (c) solicit or accept employment or be
retained by any party who, at any time during the Employment Term, was a
customer or supplier of the Corporation or any of its affiliates or any licensor
or licensee thereof where such person's position will be related to a Restricted
Business (as such term is defined in paragraph 4 above); or (d) solicit or
accept the business of any customer or supplier of the Corporation or any
affiliate of the Corporation with respect to products similar to those supplied
by the Corporation or such affiliate.

         8. Expenses & Benefits. (a) The Corporation will promptly reimburse
Executive for all reasonable and necessary business expenses incurred by him/her
in connection with providing the employment services under this Agreement.

         (b) The Corporation shall make available to Executive similar health
benefits and other benefits that it makes available to its other senior
executives.

         9. Termination; Severance and Accelerated Vesting. (a) If the
Corporation terminates your employment without "just cause" (as defined in
Exhibit A hereto) or you terminate your employment for "good reason" (as defined
in Exhibit A hereto), then Executive will be entitled to receive the amounts set
forth under paragraph 9(b) below and Executive shall receive one additional year
of vesting on all stock options granted to you; provided, however, if your
employment is terminated in accordance with this paragraph 9(a) in anticipation
of or within 12 months following a "Qualified Change in Control" then you shall
be entitled to immediate vesting of all remaining unvested stock options.
Additionally, regardless of such termination, your stock options shall remain
exercisable until the earlier of: (i) 2 years following such termination and
(ii) for the full term of such options.

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         (b) In the event your employment is terminated in accordance with
paragraph 9(a), you shall receive a lump-sum payment equal to: (i) one (1)
year's Base Salary; (ii) any earned and unpaid bonus as of the date of
termination; and (iii) any incurred and unpaid expenses; provided, however, if
your employment is terminated in accordance with paragraph 9(a) in anticipation
of or within 12 months following a "Qualified Change in Control" then you
instead will be entitled to a lump-sum payment equal to: (iv) two (2) year's
Base Salary; (v) any earned and unpaid bonus as of the date of termination; and
(vi) any incurred and unpaid expenses.

         (c) In the event that your employment is terminated as a result of
death or Disability (as defined in Exhibit A) of the Executive, then Executive
or his estate or legal representative shall receive a lump-sum payment equal to
(a) Base Salary through the date of termination, (b) any earned and unpaid bonus
and (c) any incurred and unpaid expenses.

         (d) Notwithstanding the foregoing, the Corporation may terminate the
Executive immediately and without prior notice for just cause. In the event that
the Executive's employment has been terminated for just cause, the Executive
shall not be entitled to receive any of the severance benefits set forth in this
Section 9, but he shall be entitled to any unpaid wages, bonuses, and any
benefits under the benefit and compensation plans, policies and arrangements of
the Corporation in which in he participates, which have accrued through his date
of termination.

         10. Indemnification. The Corporation shall defend and indemnify
Executive in his capacity as President and Director of the Corporation against
any and all claims, judgments, damages, liabilities, costs and expenses
(including reasonable attorney's fees) arising out of, based upon or related to
the Executive's performance of services hereunder, except to the extent that
such claims arise out of Executive's (a) willful misconduct, (b) bad faith, (c)
gross negligence or (d) reckless disregard of the duties involved in the conduct
of Executive's position.

         11. Entire Agreement; Waiver. This Agreement contains the entire
understanding of the parties with respect to the retention of Executive by the
Corporation. There are no restrictions, agreements, promises, warranties,
covenants or undertakings between the parties with respect to the subject matter
herein other than those expressly set forth herein. This Agreement may not be
altered, modified, or amended except by written instrument signed by the parties
hereto.

         12. Governing Law. This Agreement shall be governed by, and construed
and interpreted in accordance with, the laws of the State of New York without
regard to such State's principles of conflict of laws. The parties hereto
consent to the exclusive jurisdiction of the courts of the State of New York or
any district court sitting in the State of New York for any disputes arising
under this letter agreement.

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          13. Remedies. The Executive understands and agrees that any breach of
Sections 5, 6 and/or 7 of this Agreement by him could cause irreparable damage
to the Corporation and its affiliates, and that monetary damages alone would not
be adequate and, in the event of such breach, the Corporation shall have, in
addition to any and all remedies of law, the right to an injunction, specific
performance or other equitable relief to prevent or redress the violation of the
Corporation's rights under such Sections.

         14. Headings. The headings of the Sections are inserted for convenience
of reference only and shall not affect any interpretation of this Agreement.

         15. Severability of Provisions. If any provision of this Agreement
shall be declared by a court of competent jurisdiction to be invalid, illegal or
incapable of being enforced in whole or in part, such provision shall be
interpreted so as to remain enforceable to the maximum extent permissible
consistent with applicable law. The remaining conditions and provisions or
portions thereof shall nevertheless remain in full force and effect and
enforceable to the extent they are valid, legal and enforceable, and no
provision shall be deemed dependent upon any other covenant or provision unless
so expressed herein.

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         IN WITNESS WHEREOF, the parties hereto have executed this Letter
Agreement as of the day and year first written above.

-------------------------------------------- -----------------------------------
EXECUTIVE:                                   CORPORATION:

                                             KERYX BIOPHARMACEUTICALS, INC.

                                             by: /s/ Michael S. Weiss
                                                 -------------------------------
by: /s/ I. Craig Henderson                   Name: Michael S. Weiss
    ---------------------------------------- Title:   Chairman & CEO
Name: I. Craig Henderson, M.D.
-------------------------------------------- -----------------------------------

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                                                                       Exhibit A

                               Certain Definitions

1.       Just Cause. Any of the following actions by the Executive shall
         constitute just cause for termination by the Chairman of the Board of
         Directors of the Corporation:

         (A)      Material breach by the Executive of the confidentiality,
                  non-compete, ownership of inventions and non-solicitation
                  covenants contained in this Employment Letter Agreement; or

         (B)      Any action by the Executive constituting willful misconduct in
                  respect of the Executive's obligation to the Corporation that
                  has or is likely to result in material, economic damage to the
                  Corporation; or

         (C)      The willful and continual failure or refusal by the Executive
                  to perform his duties as under this letter employment (other
                  than by reason of death or Disability, as defined below, or
                  other reasons beyond Executive's control), provided such
                  failure or refusal continues for a period of 30 days after
                  receipt of written notice thereof from the CEO in reasonable
                  detail of such failure or refusal; or

         (D)      Conviction of any crime which involves (i) an intentional
                  wrongful act or (ii) an act of moral turpitude that (a) is
                  intended to result in substantial personal enrichment of the
                  Executive at the expense of the Corporation or (b) may have a
                  material adverse impact on the business or reputation of the
                  Corporation.

2.       Good Reason. Any of the following actions or omissions by the
         Corporation shall constitute good reason for termination by Executive:

         (A)      Material breach by the Corporation of any provision of this
                  Employment Letter Agreement which is not cured by the
                  Corporation within 30 days of notice thereof from the
                  Executive; or

         (B)      A failure to elect or reelect the Executive to the office of
                  President and Director of the Corporation or other diminution
                  of the Executive's function, duties or responsibilities in
                  each case without the Executive's written consent; or

         (C)      Reduction in Executive's Base Salary or incentives or other
                  fringe benefits of a material economic effect; or

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         (D)      Termination of the Executive's employment in anticipation of
                  or within 12 months following a "change in control" (as
                  defined below) if such termination is initiated by the
                  Corporation (or such successor corporation) without "just
                  cause" or by the Executive for "good reason" (other than as
                  set forth in this subparagh (D)). A "change in control," shall
                  mean either: (i) a Merger (as defined below), except for a
                  transaction the principal purpose of which is to change the
                  State of incorporation, (ii) the sale, transfer or other
                  disposition of all or substantially all of the assets of the
                  Corporation; or (iii) any other corporate reorganization or
                  business combination (including, but not limited to, a merger
                  in which the Corporation is the surviving entity) in which
                  more than fifty percent (50%) of the Corporation then
                  outstanding voting stock is transferred to different holders
                  in a single transaction or a series of related transactions;
                  or

         (E)      Relocation of Executive, without his prior consent, to a
                  facility or location that is more than fifty (50) miles away
                  from the Executive's then present location.

3.       Disability. Shall mean (i) the suffering of any mental or physical
         illness, disability or incapacity that shall in all material respects
         preclude the Executive from performing his employment duties or (ii)
         the Executive's absence from employment by reason of any mental or
         physical illness, disability or incapacity for a period of four and
         one-half months during any nine-month period; provided that such
         illness, disability or incapacity shall be reasonably determined by the
         Chairman of the Board of Directors of the Corporation to be of a
         permanent nature based on the foregoing standards.

4.       Merger. Shall mean a merger or consolidation of the Corporation with
         any other corporation or entity, other than a merger or consolidation
         which would result in the voting securities of the Corporation
         outstanding immediately prior thereto continuing to represent (either
         by remaining outstanding or by being converted into voting securities
         of the surviving entity) more than fifty (50%) percent of the total
         voting power represented by the voting securities of the Corporation or
         such surviving entity outstanding immediately after such merger or
         consolidation.

5.       Qualified Change in Control. Shall mean a "change in control", which
         places a value on the Corporation of in excess of $500 million.

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                                                                       Exhibit B

The Corporation will grant Executive options (the "Options") to purchase a total
of 1,000,000 shares of the common stock of the Corporation (the "Initial Grant")
at an exercise price equal to the closing price of the Corporation's Common
Stock on Nasdaq on the trading day prior to the start of Executive's employment
(the "Exercise Price"), which options shall be exercisable, after vesting, for a
period of ten (10) years from the date of issuance. Executive's Options will be
granted under the Corporation's 2000 Stock Option Plan (the "Plan") and will be
subject to the terms and conditions thereof, including any stock option
agreement entered into by Executive and the Corporation thereunder; provided,
however, that if any provisions of this Agreement are inconsistent with the
terms and conditions of the Plan and any such stock option agreement, the terms
of this Agreement shall control. In accordance with the Plan, should any change
be made to the Common Stock by reason of any stock split, stock dividend,
extraordinary cash dividend, recapitalization, combination of shares, exchange
of shares or other change affecting the outstanding Common Stock as a class
without the Corporation's receipt of consideration, appropriate adjustments
shall be made to (A) the total number and/or class of securities subject to such
options and (B) the Exercise Price in order to reflect such change and thereby
preclude a dilution or enlargement under such options. The Initial Grant shall
vest as follows (provided that Executive is employed as a service provider (ase
defined in the plan) on the date of vesting):

         (A)      55,556 after twelve months of employment;

         (B)      13,889 after fifteen months of employment;

         (C)      13,889 after eighteen months of employment;

         (D)      13,889 after twenty one months of employment;

         (E)      13,889 after twenty four months of employment;

         (F)      13,889 after twenty seven months of employment;

         (G)      13,889 after thirty months of employment;

         (H)      13,889 after thirty three months of employment;

         (I)      13,888 after thirty six months of employment;

         (J)      833,333 after seven (7) years, provided that he is employed on
                  that date as President of the Corporation.

                  (i)      The exercisability of 166,667 of these options shall
                           be accelerated in full upon the occurrence of the
                           earlier of:

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                  (a) the Corporation achieving a total market capitalization on
                  a fully diluted basis of more than $500 million, as determined
                  utilizing the following formula (the "Market Capitalization
                  Formula"): fully diluted shares (including shares attributable
                  to all options, warrants, other purchase rights and
                  convertible securities, and including shares held by
                  affiliates (collectively "market capitalization shares"))
                  multiplied by the three consecutive trading day average of the
                  closing price of its common stock as reported by Nasdaq (or
                  such other exchange as such shares are then listed or in the
                  good-faith determination of the board, if not then listed or
                  quoted) plus long-term debt (as set forth in the most recent
                  financial statements of the Corporation) minus Working Capital
                  (as defined below) and minus the aggregate exercise price of
                  all options and warrants included in the market capitalization
                  shares; or

                  (b) the Corporation possessing at least $100 million in
                  Working Capital (which shall mean as of any date, (1) the
                  current assets plus investment securities or similar asset
                  which have maturities in excess of 12 months minus (2) current
                  liabilities) (the occurrence of either of the items in (J)a.
                  and b. being referred to as the "First Milestone Event").

              (ii) The exercisability of 166,666 of these options shall be
              accelerated in full upon the occurrence of the earlier of:

                  (a) the Corporation achieving a total market capitalization on
                  a fully diluted basis of more than $1 billion, as determined
                  utilizing the Market Capitalization Formula ; or

                  (b) the Corporation possessing at least $150 million in
                  Working Capital (the occurrence of either of the items in
                  (K)a. and b. being referred to as the "Second Milestone
                  Event").

              (iii) The exercisability of 166,667 of these options shall be
              accelerated in full upon the approval of the NDA for KRX-101
              (sulodexide) by the United States Food and Drug Administration
              ("FDA").

              (iv) The exercisability of 166,667 of these options shall be
              accelerated in full upon the approval of the first NDA by the FDA
              for a drug candidate acquired by the Corporation from Access
              Oncology, Inc.

              (v) The exercisability of 166,666 of these options shall be
              accelerated in full upon annual sales for any or all the drug
              candidates acquired by the Corporation from Access Oncology, Inc.
              exceeding $100 million.

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                Proprietary Information and Inventions Agreement

         In consideration of my employment or continued employment by Keryx
Biopharmaceuticals, Inc. (together with any subsidiary of Keryx
Biopharmaceuticals, Inc., the "Corporation"), and the compensation now and
hereafter paid to me, I hereby agree as follows:

         1. Recognition of Corporation's Rights; Nondisclosure. At all times
during the term of my employment and thereafter, I will hold in strictest
confidence and will not disclose, use, lecture upon or publish any of the
Corporation's Proprietary Information (defined below), except as such
disclosure, use or publication may be required in connection with my work for
the Corporation, or unless an officer of the Corporation expressly authorizes
such in writing.

         The term "Proprietary Information" shall mean trade secrets,
confidential knowledge, data or any other proprietary information of the
Corporation. By way of illustration but not limitation, "Proprietary
Information" includes (a) inventions, mask works, trade secrets, ideas,
processes, formulas, source and object codes, data, programs, other works of
authorship, know-how, improvements, discoveries, developments, designs and
techniques (hereinafter collectively referred to as "Inventions"); and (b)
information regarding plans for research, development, new products, regulatory
matters, marketing and selling, business plans, budgets and unpublished
financial statements, licenses, prices and costs, suppliers and customers; and
information regarding the skills and compensation of other employees of the
Corporation. Notwithstanding the foregoing, the following shall not be deemed
Proprietary Information: (c) was in my possession or control prior to the date
of disclosure; (d) was in the public domain or enters into the public domain
through no improper act on my part; (e) is approved for public release by
written authorization by the Corporation; or (f) is required to be disclosed by
me by legal, administrative or judicial order.

         2. Third Party Information. I understand, in addition, that the
Corporation has received, and in the future will receive, from third parties
confidential or proprietary information ("Third Party Information") subject to a
duty on the Corporation's part to maintain the confidentiality of such
information and to use it only for certain limited purposes. During the term of
my employment and thereafter, I will hold Third Party Information in the
strictest confidence and will not disclose to anyone (except in connection with
my work for the Corporation), unless expressly authorized by an officer of the
Corporation in writing.

         3.  Assignment of Inventions

              3.1 Assignment

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                  (a) I hereby assign to the Corporation all my right, title and
interest in and to any and all Inventions and all patent rights, copyrights,
mask work rights, trademarks, trade secret rights, all other rights throughout
the world in connection therewith, and the goodwill associated with all of the
foregoing (collectively, "Proprietary Rights"), whether or not patentable or
registrable under patent, copyright, trademark or similar statutes, made or
conceived or reduced to practice or learned by me, either alone or jointly with
others, during the period of my employment with the Corporation and in
connection therewith. Inventions assigned to, or as directed by, the Corporation
under this Paragraph 3 are hereinafter referred to as "Corporation Inventions".
I agree, upon request, to execute, verify and deliver assignments of the
Proprietary Rights to the Corporation or its designee and I hereby appoint the
Corporation my attorney-in-fact with respect to the Proprietary Rights for the
purpose of effecting any or all of the Corporation's rights to the Proprietary
Rights.

         3.1 Government. I also agree to assign to or as directed by the
Corporation all my right, title and interest in and to any and all Inventions,
full title to which is required to be assigned to the United States of America
by a contract between the Corporation and United States of America or any of its
agencies.

         3.2 Works for hire. I acknowledge that all original works of authorship
which are made by me (solely or jointly with others) within the scope of my
employment and which are protectable by copyright are "works made for hire", as
that term is defined in the United States Copyright Act (17 U.S.C. Section 101).

         4. Enforcement of Proprietary Rights. From time to time, I will assist
the Corporation in every proper way to obtain and enforce United States and
foreign Proprietary Rights relating to Corporation Inventions in any and all
countries. My obligation to assist the Corporation with respect to Proprietary
Rights relating to such Corporation Inventions in any and all countries shall
continue beyond the termination of my employment, but the Corporation shall
compensate me at a reasonable rate after my termination for the time actually
spent by me at the Corporation's request on such assistance.

         I hereby waive and quitclaim to the Corporation any and all claims, of
any nature whatsoever, which I now or may hereafter have for infringement of any
Proprietary Rights assigned hereunder to the Corporation.

         5. Obligation to Keep Corporation Informed. During the period of my
employment, I will promptly disclose all Inventions to the Corporation fully and
in writing and will hold such Inventions in trust for the sole right and benefit
of the Corporation. In addition, after termination of my employment, I will
promptly disclose all patent applications filed by me within a year after
termination of employment.

         6. Prior Inventions. Inventions, if any, patented or unpatented, which
I made prior to the commencement of my employment with the Corporation are
excluded from the scope of this Agreement. To preclude any possible uncertainty,
I have set forth in Exhibit A attached hereto a complete list of all Inventions
(i) that I have, alone or jointly with others, conceived, developed or reduced
to practice or caused to be conceived, developed or reduced to practice prior to
the commencement of my employment with the Corporation, (ii) that I consider to
be my property or the property of third parties and (iii) that I wish to have
excluded from the scope of this Agreement. If disclosure of any such Invention
on Exhibit A would cause me to violate any prior confidentiality agreement, I
understand that I am not to list such Inventions in Exhibit A but am to inform
the Corporation that all such Inventions have not been listed for that reason.

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         7. No Improper Use of Materials. During my employment by the
Corporation, I will not improperly use or disclose any confidential information
or trade secrets, if any, of any former employer or any other person to whom I
have an obligation of confidentiality, and I will not bring onto the premises of
the Corporation any unpublished documents or any property belonging to any
former employer or any other person to whom I have an obligation of
confidentiality unless consented to in writing by that former employer or
person.

         8. No Conflicting Obligation. I represent that my performance of all
the terms of this Agreement and my performance of my duties as an employee of
the Corporation do not and will not breach any agreement to keep in confidence
information acquired by me in confidence or in trust prior to my employment by
the Corporation. I have not entered into, and I agree I will not enter into, any
agreement either written or oral in conflict herewith.

         9. Return of Corporation Documents. When I leave the employ of the
Corporation, I will deliver to the Corporation any and all drawings, notes,
memoranda, specifications, devices, formulas, molecules, cells, storage media,
including software, documents and computer printouts, together with all copies
thereof, and any other material containing or disclosing any Corporation
Inventions, Third Party Information or Proprietary Information of the
Corporation. I further agree that any property situated on the Corporation's
premises and owned by the Corporation, including disks and other storage media,
filing cabinets or other work areas, is subject to inspection by Corporation
personnel at any time with or without notice. Prior to leaving, I will cooperate
with the Corporation in completing and signing the Corporation's termination
statement for technical and management personnel.

         10. Legal and Equitable Remedies. Because my services are personal and
unique and because I may have access to and may become acquainted with the
Proprietary Information of the Corporation, the Corporation shall have the right
to enforce this Agreement and any of its provisions by injunction, specific
performance or other equitable relief, without bond, without prejudice to any
other rights and remedies that the Corporation may have for a breach of this
Agreement, and I waive the claim or defense that the Corporation has an adequate
remedy at law. I shall not, in any action or proceeding to enforce any of the
provisions of this Agreement, assert the claim or defense that such an adequate
remedy at law exists.

                                       14
<PAGE>

         11. Notices. Any notices required or permitted hereunder shall be given
to me at the address specified below or at such other address as I shall specify
in writing. Such notice shall be deemed given upon personal delivery to the
appropriate address or if sent by certified or registered mail, three days after
the date of mailing.

         12. General Provisions.

                  12.1 Governing Law. This Agreement is executed under seal and
will be governed by and construed according to the laws of the State of New
York.

                  12.2 Entire Agreement. This Agreement is the final, complete
and exclusive agreement of the parties with respect to the subject matter hereof
and supersedes and merges all prior discussions between us. No modification or
amendment of this Agreement, nor any waiver of any rights under this Agreement,
will be effective unless in writing, signed by the party to be charged. Any
subsequent change or changes in my duties, salary or compensation will not
affect the validity or scope of this Agreement. As used in this Agreement, the
period of my employment includes any time during which I may be retained by the
Corporation as a consultant.

                  12.3 Severability. If one or more of the provisions in this
Agreement are deemed unenforceable by law, then the remaining provisions will
continue in full forced and effect.

                  12.4 Successors and Assigns. This Agreement will be binding
upon my heirs, executors, administrators and other legal representatives and
will be for the benefit of the Corporation, its successors, and its assigns. I
may not assign any of my rights, or delegate any of my obligations, under this
Agreement.

                  12.5 Survival. The provisions of this Agreement shall survive
the termination of my employment and the assignment of this Agreement by the
Corporation to any successor in interest or other assignee.

                  12.6 Employment. I agree and understand that nothing in this
Agreement shall confer on me any right with respect to continuation of my
employment with the Corporation, or shall it interfere in any way with my right
or the Corporation's right to terminate my employment at any time, with or
without cause.

                  12.7 Waiver. No waiver by the Corporation of any breach of
this Agreement shall be a waiver of any preceding or succeeding breach. No
waiver by the Corporation of any right under this Agreement shall be construed
as a wavier of any other right. The Corporation shall not be required to give
notice to enforce strict adherence to all terms of this Agreement.

                                       15
<PAGE>

                  12.8 Counterparts. This Agreement may be executed in
counterparts, all of which together shall for all purposes constitute one
Agreement, binding on each of the parties hereto notwithstanding that each such
party shall not have signed the same counterpart.

                  12.9 Jurisdiction and Venue; Waiver of Jury Trial. In case of
any dispute hereunder, the parties will submit to the exclusive jurisdiction and
venue of any court of competent jurisdiction sitting in New York County, and
will comply with all requirements necessary to give such court jurisdiction over
the parties and the controversy. EACH PARTY HEREBY WAIVES ANY RIGHT TO A JURY
TRIAL AND TO CLAIM OR RECOVER PUNITIVE DAMAGES.

                  12.10 Disclosure. I shall disclose the existence and terms of
this Agreement to any employer or other person that I may work for or be engaged
by after the termination of my employment or engagement at the Corporation. I
agree that the Corporation may, after notification to me, provide a copy of this
Agreement to any business or enterprise (i) which I may directly or indirectly
own, manage, operate, finance, join, control or participate in the ownership,
management, operation, financing, or control of, or (ii) with which I may be
connected with as an officer, director, employee, partner, principal, agent,
representative, consultant or otherwise, or in connection with which I may use
or permit my name to be used. I will provide the names and addresses of any of
such persons or entities as the Corporation may from time to time reasonably
request.

         This Agreement shall be effective as of the first day of my employment
with the Corporation, namely ___________________________________.

         I UNDERSTAND THAT THIS AGREEMENT AFFECTS MY RIGHTS TO INVENTIONS I MAKE
DURING MY EMPLOYMENT, AND RESTRICTS MY RIGHTS TO DISCLOSE OR USE THE
CORPORATION'S CONFIDENTIAL INFORMATION DURING OR SUBSEQUENT TO MY EMPLOYMENT.

         I HAVE READ THIS AGREEMENT CAREFULLY AND UNDERSTAND ITS TERMS.

Signature:

/s/ Craig Henderson
------------------------------
Craig Henderson

                                       16
<PAGE>

ACCEPTED AND AGREED TO:
Keryx Biopharmaceuticals, Inc.

By: /s/ Michael S. Weiss
    ---------------------------------
Name: Michael S. Weiss
Title: Chairman & Chief Executive Officer

                                       17SECURED LINE OF CREDIT PROMISSORY NOTE

$500,000.00                  Springfield, Missouri                April 29, 2004

      FOR VALUE RECEIVED, the undersigned, Decorize, Inc., a Delaware
corporation (herein called "Borrower"), hereby promises to pay to the order of
SRC Holdings Corporation, a Missouri corporation (herein called "Lender"), the
principal sum of Five Hundred Thousand and NO/100 Dollars ($500,000.00), or, if
greater or less, the aggregate unpaid principal amount of all advances made by
Lender to Borrower hereunder, as shown on Schedule I attached hereto (as the
same is modified from time to time), together with interest on the unpaid
principal balance thereof as hereinafter set forth in this Note. Both principal
and interest are payable as herein provided in lawful money of the United States
of America at the address provided by Lender for purposes of payment, or at such
other place as from time to time may be designated by the holder of this Note.

      This Note (a) is issued and delivered in conjunction with that certain
Security Agreement of even date herewith between Borrower and Lender (as from
time to time supplemented, amended or restated, the "Security Agreement"), and
is the "Note" as defined therein, and (b) is secured by all of the Collateral of
Borrower (as such term is defined in the Security Agreement). Reference is
hereby made to the Security Agreement for a description of certain rights,
limitations of rights, obligations and duties of the parties hereto and for a
description of the nature and extent of the security thereby provided and the
rights of the parties thereto.

      At any time and from time to time following the execution of this Note,
upon three (3) days prior notice to Lender, Borrower may borrow such sums under
this Note as it so desires, so long as (a) each such notice requests a draw in
an amount equal to $250,000, and (b) the aggregate principal amount outstanding
does not exceed Five Hundred Thousand and No/100 Dollars ($500,000.00).

      This Note (exclusive of any past due principal or interest) from time to
time outstanding shall bear interest on each day outstanding at the Base Rate
(as defined below) in effect on such day. The "Base Rate" of this Note shall be
equal to the prime rate per annum, as published by the Wall Street Journal for
any given day, plus one-half percent (.5%). Each change in the Base Rate shall
become effective without prior notice to Borrower automatically as of the
opening of business on the date of such change in the Base Rate. Upon the
occurrence of an Event of Default, all past due principal of and past due
interest under this Note shall bear interest on each day outstanding at a rate
per annum equal to the Base Rate plus three percent (3%) (the "Default Rate").
If any Event of Default is cured by Borrower or waived by Lender, the Default
Rate shall not apply for any period following such cure or waiver, as
applicable. Notwithstanding anything to the contrary in this paragraph, in no
event shall the Base Rate or the Default Rate exceed the Highest Lawful Rate (as
defined below), and if at any time either of those rates exceed the Highest
Lawful Rate, then such rate shall be deemed modified to equal the Highest Lawful
Rate, for so long as such rate exceeds the Highest Lawful Rate.

                                       1
<PAGE>

      Interest payments on the unpaid principal balance of this Note shall be
made in monthly installments over the term of this Note on the 29th day of each
calendar month, commencing May 29, 2004. All payments made under this Note shall
be applied first to costs of enforcement or collection of this Note (if any),
second, to accrued but unpaid interest, and third, to outstanding principal. The
outstanding principal amount of this Note, together with all accrued but unpaid
interest thereon, shall be due and payable in full on or before 5:00 p.m.
Springfield, Missouri time, on September 30, 2004.

      It is the intention of the parties to comply with all applicable laws.
Accordingly, it is agreed that, notwithstanding any provisions to the contrary
in this Note, interest on the debt evidenced by this Note shall not at any time
exceed the maximum amount of nonusurious interest that may be contracted for,
taken, reserved, charged or received under applicable law (the "Highest Lawful
Rate"). Any interest in excess of that maximum amount shall be credited on the
principal of the debt or, if that has been paid, refunded. It is further agreed
that, without limitation of the foregoing, all calculations of the rate of
interest contracted for, charged, or received under this Note that are made for
the purpose of determining whether such rate exceeds the Highest Lawful Rate
shall be made, to the extent permitted by applicable law, by amortizing,
prorating, allocating, and spreading in equal parts during the period of the
full term of the indebtedness evidenced hereby, all interest at any time
contracted for, charged, or received from Borrower or otherwise by the holder or
holders hereof in connection with such indebtedness.

      For purposes of this Note, the following events shall constitute an "Event
of Default":

            (a) the default by Borrower in any required payment of principal of
      or interest on this Note; or

            (b) Borrower breaches or otherwise fails to perform or observe any
      covenant or agreement that is set forth in this Note or in the Security
      Agreement; or

            (c) the entry of a decree or order for relief by a court having
      jurisdiction in respect of Borrower in an involuntary case under the
      federal bankruptcy laws, as now or hereafter constituted, or any other
      applicable federal or state bankruptcy, insolvency or other similar law,
      which is not vacated or dismissed within sixty (60) days, or appointing a
      receiver, liquidator, assignee, custodian, trustee, sequestrator (or other
      similar official) of Borrower or for any substantial part of its property,
      or ordering the winding up or liquidation of its affairs; or

            (d) the commencement by Borrower or any affiliate thereof of a
      voluntary case under the federal bankruptcy laws, as now constituted or
      hereafter amended, or any other applicable federal or state bankruptcy,
      insolvency or other similar law, or the consent by it to the appointment
      to or taking possession by a receiver, liquidator, assignee, trustee,
      custodian, sequestrator (or other similar official) of Borrower or for any
      substantial part of its property, or the making by it of any assignment
      for the benefit of creditors, or the admission by it in writing of its
      inability to pay its debts generally as they become due; or

                                       2
<PAGE>

            (e) if Borrower is liquidated or winds up its affairs; or

            (f) the sale or liquidation of all or substantially all of the
      assets of Borrower.

      Upon the occurrence of an Event of Default, then, and in every such case,
the holder of this Note may declare the principal of this Note, together with
all accrued and unpaid interest thereon to be due and payable immediately, and
the same shall become and be due and payable, without presentment, demand,
protest, notice of intent to accelerate or other notice of any kind all of which
are expressly waived, and Lender may exercise all remedies available at law, in
equity or hereunder.

      If this Note is placed in the hands of an attorney for collection after
default, or if all or any part of the indebtedness represented hereby is proved,
established or collected in any court or in any bankruptcy, receivership, debtor
relief, probate or other court proceedings, Borrower and all endorsers, sureties
and guarantors of this Note, jointly and severally, agree to pay reasonable
attorneys' fees and collection costs to the holder hereof in addition to the
principal and interest payable hereunder.

      All advances of cash made by Lender to Borrower hereunder and all payments
made hereon shall be recorded by Lender on Schedule I attached hereto, and it
shall be unnecessary for Borrower to execute any further notes to evidence the
obligation of Borrower to pay the amount of each advance together with interest
thereon as herein provided. Recordation and endorsement of such advances as
herein provided shall be conclusive evidence of the receipt by Lender of the
request therefor and of the making of such advances for the account of Borrower.

      Borrower and all endorsers, sureties and guarantors of this Note hereby
severally waive demand, presentment, notice of demand and of dishonor and
nonpayment of this Note, protest, notice of protest, notice of intention to
accelerate the maturity of this Note, declaration or notice of acceleration of
the maturity of this Note, diligence in collecting, the bringing of any suit
against any party and any notice of or defense on account of any extensions,
renewals, partial payments or changes in any manner of or in this Note or in any
of its terms, provisions and covenants, or any releases or substitutions of any
security, or any delay, indulgence or other act of any trustee or any holder
hereof, whether before or after maturity.

      THIS NOTE AND THE RIGHTS AND DUTIES OF THE PARTIES HERETO SHALL BE
GOVERNED BY THE LAWS OF THE STATE OF DELAWARE (WITHOUT REGARD TO PRINCIPLES OF
CONFLICTS OF LAW), EXCEPT TO THE EXTENT THE SAME ARE GOVERNED BY APPLICABLE
FEDERAL LAW. The parties irrevocably submit to the exclusive jurisdiction of the
state and federal courts located in Greene County, Missouri for the purpose of
any suit, action or other proceeding arising out of or based on this Note. Each
party, to the extent applicable law permits, waives, and will not assert by way
of motion, as a defense or otherwise, in any suit, action or proceeding brought
in the above-named courts, any claim that (a) it is not subject personally to
the jurisdiction of those courts, (b) the suit, action or proceeding is brought
in an inconvenient forum, (c) the venue of the suit, action or proceeding is
improper, or (d) any of these agreements and instruments, or their respective
subject matter, may not be enforced in or by these courts.

                                       3
<PAGE>

      Executed as of the date first written above.

                                        BORROWER:

                                        DECORIZE, INC.
                                        a Delaware corporation

                                        By: /s/ Steve Crowder
                                           -------------------------------------
                                           Steve Crowder
                                           Its: President

                                       4
<PAGE>

                                                    SCHEDULE I

<TABLE>
<CAPTION>
                               Principal                    Principal
Date                           Amount Advanced              Amount Repaid               Balance Outstanding
----                           ---------------              -------------               -------------------
<S>                            <C>                          <C>                         <C>
---------------------------    ------------------------     ------------------------    ----------------------------

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

                                       5

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