Exhibit 4.5



                               SECURITY AGREEMENT



          SECURITY  AGREEMENT dated January 28, 2005,  between  Vertical Capital
Partners,  Inc., a Delaware corporation,  as agent (the "Agent") for the benefit
of the  individuals or entities  listed on Schedule A hereto  ("Creditor"),  and
Applied DNA Sciences, Inc., a Nevada corporation (collectively, "Obligor").

          1. GENERAL DEFINITIONS.

          1.1 As used  herein,  "UCC"  means the Uniform  Commercial  Code as in
effect from time to time in the State of New York.

          1.2  All  capitalized  terms  contained  in  this  Agreement,  but not
specifically defined in this Agreement,  shall have the meanings provided by the
UCC to the extent the same are used or defined therein. Without limitation,  the
following terms are used herein as defined in the UCC:  Account,  Chattel Paper,
Deposit Accounts, Documents, Equipment, General Intangibles, Goods, Instruments,
Inventory,  Investment Property,  Letter of Credit Rights,  Payment Intangibles,
Proceeds, and Supporting Obligations.

          1.3 As used herein:

               a.  "Person"  means  any  individual,  corporation,  partnership,
limited liability  company,  trust,  unincorporated  organization,  or any other
entity or organization.

               b.  "Other Obligor" means any other person obligated as direct or
indirect  obligor  or  guarantor  of any  Obligations,  or of any  indebtedness,
obligations and liabilities guaranteed by Obligor.

               c.   "Receivable"   means any  right to  payment,  including  any
Account,  whether or not evidenced by an Instrument or Chattel Paper and whether
or not it has been earned by performance.

          (2)  OBLIGATIONS  SECURED.  The  Collateral  (as defined  below) shall
secure  any and all  indebtedness,  obligations  and  liabilities  of Obligor to
Creditor, including:

               a.  all  unpaid  principal  of and  interest  on,  and all  other
obligations  or  liabilities  of Obligor  which may arise under or in connection
with the 10% Secured  Convertible  Promissory  Notes in the aggregate  principal
amount of $5,970,000 issued on January  28, 2005 by Obligor.

               b.   all   interest,   fees,   costs,   expenses,   reimbursement
obligations, indemnities and other liabilities relating to any of the foregoing,
including  attorneys'  fees and costs or expenses  incurred in  connection  with
collection  and  enforcement  and sums  advanced  by  Creditor  to  protect  the
Collateral  or  otherwise  as  permitted  to be  made  by  Creditor  under  this
Agreement; and

               c.  all  indebtedness,  obligations and  liabilities  under this
Agreement;  in each case,  whether now existing or hereafter  arising,  joint or
several, absolute or contingent, liquidated or unliquidated, and however arising
(all such indebtedness,  obligations and liabilities being collectively referred
to herein as the "Obligations"; and any agreement, instrument, guaranty or other
document now or hereafter  evidencing or securing any of the Obligations,  being
collectively referred to herein as the "Financing Documents").


          3.  GRANT OF SECURITY  INTEREST.  To secure the  punctual  payment and
performance  of the  Obligations  when due  whether at the stated  maturity,  by
acceleration or otherwise  Obligor hereby grants to Creditor a security interest
in and to,  and a lien upon (the  "Security  Interest"),  all  right,  title and
interest  of Obligor in and to the  following  property,  whether  now owned and
existing or hereafter acquired or arising,  and wherever located  (collectively,
the "Collateral"):

               (a) All  now  owned  and  hereafter  acquired  right,  title  and
interest of Obligor in, to and in respect of all:  accounts,  interests in goods
represented by accounts,  returned,  reclaimed or repossessed goods with respect
thereto  and  rights  as an  unpaid  vendor;  contract  rights;  chattel  paper;
investment property;  general intangibles (including but not limited to, tax and
duty  claims and  refunds,  registered  and  unregistered  patents,  trademarks,
service marks,  copyrights trade names,  applications  for the foregoing,  trade
secrets, goodwill, processes,  drawings,  blueprints,  customer lists, licenses,
whether as licensor or licensee, choses in action and other claims, and existing
and  future  leasehold  interests  in  equipment,   real  estate  and  fixtures)
(collectively,  the "General Intangibles");  documents;  instruments; letters of
credit, bankers' acceptances or guaranties;  cash moneys, deposits;  securities,
bank  accounts,  deposit  accounts,  credits and other property now or hereafter
held in any capacity by Lender, its affiliates or any entity which, at any time,
participates in Lender's  financing of Obligor at any other  depository or other
institution;  agreements  or  property  securing or relating to any of the items
referred to above;

               (b) All  now  owned  and  hereafter  acquired  right,  title  and
interest of Obligor in, to and in respect of goods,  including,  but not limited
to:

                    (i) All inventory,  wherever  located,  whether now owned or
hereafter acquired,  of whatever kind, nature or description,  including all raw
materials, work-in-process, finished goods, and materials to be used or consumed
in  Obligor's  business;  and all  names or marks  affixed  to or to be  affixed
thereto for  purposes of selling  same by the  seller,  manufacturer,  lessor or
licensor  thereof  and all  inventory  which may be  returned  to Obligor by its
customers  or  repossessed  by Obligor  and all of  Obligor's  right,  title and
interest in and to the foregoing  (including all of Obligor's rights as a seller
of goods);

                    (ii) All equipment and fixtures,  wherever located,  whether
now owned or hereafter acquired,  including,  without limitation, all machinery,
equipment,  motor vehicles,  furniture and fixtures,  and any and all additions,
substitutions,  replacements (including spare parts), and accessions thereof and
thereto  (including,  but not limited to Obligor's  rights to acquire any of the
foregoing, whether by exercise of a purchase option or otherwise);

                    (iii) All consumer  goods,  farm  products,  crops,  timber,
minerals or the like  (including  oil and gas),  wherever  located,  whether now
owned or hereafter acquired, of whatever kind, nature or description;

               (c) All  now  owned  and  hereafter  acquired  right,  title  and
interests  of  Obligor  in,  to and in  respect  of any real or  other  personal
property in or upon which Obligor has or may hereafter have a security interest,
lien or right of setoff;

               (d) All present and future  books and records  relating to any of
the above including,  without limitation,  all computer programs, printed output
and computer  readable  data in the  possession  or control of the Obligor,  any
computer service bureau or other third party; and

               (e)  All  Proceeds  of any of such  property  in  whatever  form,
whether derived from voluntary or involuntary  disposition,  all products of any
of  such  property,  all  renewals,  replacements,   substitutions,   additions,
accessions,  rents,  issues,  royalties  and  profits  of,  to or from  any such
property and all dividends or other income from Investment Property, collections
thereon or distributions or payments with respect thereto.

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The Security Interest created herein is subject to any applicable restriction to
the creation of a Security  Interest to the extent that such  restriction is not
made ineffective by UCC Sections 9-406, 9-407, 9-408, or 9-409.


          4. PERFECTION OF SECURITY INTEREST.  Obligor shall execute and deliver
to the Agent UCC-1 Financing Statements  ("Financing  Statements")  assigning to
the Agent security  interests in Obligor's  right,  title and interest in and to
the  Collateral.  Obligor  hereby  authorize  the Agent to file  such  Financing
Statements at the Obligor's expense, in such filing locations as the Agent deems
appropriate.

          5.  REPRESENTATIONS AND WARRANTIES. Obligor represents and warrants to
Agent and Creditor that:

               5.1  Authority.  Obligor  has full power and  authority  to grant
security  interests in the Collateral and to execute,  deliver,  and perform its
obligations in accordance with the terms of this Agreement,  without the consent
or approval of any other person except as may have been  specifically  disclosed
to Creditor in writing.

               5.2 Absence of Other  Encumbrances.  The  Collateral  is free and
clear of all liens and adverse  claims other than the Security  Interest,  which
shall be a first lien on the  Collateral  except for (i) purchase money security
interests on Inventory or Equipment not financed by Creditor, (ii) liens imposed
by law such as materialmen's,  suppliers', mechanics', carriers', repairmen's or
other like liens imposed in the ordinary course of business, and (iii) liens for
taxes, assessments or governmental charges not yet due or delinquent.

               5.3 Information  Regarding Names.  Obligor has disclosed to Agent
and Creditor on Exhibit 5.3 hereto  complete and correct  information  regarding
Obligor's  exact legal name and all prior or current  names and trade names used
by Obligor.  Exhibit 5.3 also lists the names of all Persons  from whom  Obligor
acquired any assets during the period of five (5) years ended on the date hereof
(other than acquisitions in the ordinary course of business of Obligor).

               5.4 Location of Collateral and Principal  Place of Business.  All
Collateral  which is tangible and all related  books and records  related to the
Collateral  are located  solely in the states  listed in Exhibit 5.4 hereto (the
"Collateral  States"),  except for  Inventory  in transit to Obligor and, in the
case of other Collateral  which is movable,  as required in the operation of the
Obligor's  business  consistent with past practices.  No inventory of any Person
other  than  Obligor  is located  on any  premises  owned or leased by  Obligor.
Obligor's  principal  place of  business is located in the state  identified  in
Exhibit 5.4.

               5.5 Jurisdiction of Incorporation. Obligor has disclosed to Agent
and Creditor in Exhibit 5.5 hereto  complete and correct  information  regarding
the Obligor's jurisdiction of incorporation and its identification number in the
records of such jurisdiction.

          6. COVENANTS AND AGREEMENTS OF OBLIGOR.  Obligor  covenants and agrees
as follows:

               6.1  Restriction  on  Further  Encumbrances.  Obligor  shall not,
without the prior written consent of Creditor,  create, grant or suffer to exist
any other liens in or to any of the Collateral except for Permitted Liens.

               6.2 Records and  Inspection.  Obligor  shall keep and cause to be
kept  accurate and complete  records of the  Collateral  and its proceeds at its
principal place of business, which Collateral and records will be made available
for inspection and copying upon such premises by Agent at any reasonable time.

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               6.3  Restrictions  on Removal of  Collateral.  Obligor  shall not
remove  Collateral or any related books and records from the  Collateral  States
except for removal of incidental  items of Collateral in the ordinary  course of
Obligor's business, consistent with past practice.

               6.4 Restriction on Changing State of Organization.  Obligor shall
not change the state of its  incorporation  or its  jurisdiction of organization
(as applicable) or convert into a different type of entity.

               6.5 Information Regarding Names. At least 30 days before changing
its name or adopting a new name,  Obligor shall give written  notice to Agent of
any new name or trade name of Obligor.

               6.6 Information on Collateral and Business. Obligor shall deliver
to Agent such other data and information (financial and otherwise) as Agent from
time to time may reasonably request bearing upon or related to the Collateral or
Obligor's business operations or financial condition.

               6.7 Duty of Care. Obligor shall be responsible for preserving and
maintaining  the Collateral and Agent shall have no duty of care with respect to
the  Collateral,  except  that  Agent  shall  have  an  obligation  to  exercise
reasonable care with respect to Collateral in its possession;  provided that (i)
Agent shall be deemed to have  exercised  reasonable  care if  Collateral in its
possession is accorded  treatment  substantially  comparable to that which Agent
accords its own property or treatment  substantially  in accordance with actions
requested by Obligor in writing, although Agent shall not be obligated to comply
with any such  requests  and (ii) Agent shall not be  obligated to take steps to
preserve rights against any other parties or property.

               6.8 Taxes.  Obligor  shall pay when due all  governmental  taxes,
assessments or charges upon the Collateral.

               6.9 Further  Assurances and Authority of Creditor.  Obligor shall
from time to time execute, deliver, file and record all such further agreements,
instruments,  financing statements,  notices and other documents  (collectively,
"Supplemental  Documentation")  as may be  requested  by  Agent  to  perfect  or
preserve the Security  Interest,  to enable Agent to notify any third parties of
the existence of the Creditor's Security Interest, or otherwise to carry out the
intent of this Agreement.  Obligor authorizes Agent to file financing statements
where  desirable in Agent 's judgment to perfect the Security  Interest  without
the signature of Obligor.  If any amount payable under or in connection with any
of the Collateral shall be or become  evidenced by any Instrument,  Certificated
Security or Chattel Paper,  such  Instrument,  Certificated  Security or Chattel
Paper  shall be  immediately  delivered  to  Agent,  duly  indorsed  in a manner
satisfactory to Agent, to be held as Collateral pursuant to this Agreement.

               6.10  Power  of  Attorney.   Obligor  hereby  irrevocably  makes,
constitutes and appoints Agent (and all persons  designated by Creditor for that
purpose) as Obligor's true and lawful attorney (and  agent-in-fact)  to (i) sign
the  name of  Obligor  on any  Supplemental  Documentation  and to  deliver  any
Supplemental Documentation to such persons as Agent, in its sole discretion, may
elect and (ii) to obtain  hold,  direct or  redirect  delivery  of or  otherwise
administer,  and control any  agreement,  instrument or document  evidencing any
portion of the Collateral or Obligor's  rights with respect  thereto,  including
documents of title,  warehouse  receipts and security  agreements  (collectively
"Special Collateral"), as Agent, in its sole discretion, may elect.

               6.11 Insurance.  Obligor shall, at its sole expense, maintain the
Collateral  insured  against  such  risks and in such  amounts,  subject to such
deductibles,  and for such periods as is customarily  carried by other owners or
users of such properties comparable to Obligor in similar businesses.  Within 30
days  after the date of this  Agreement,  such  policies  shall be  endorsed  to

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provide that: (i) the insurance carrier shall give at least 30 days prior notice
to Agent  before any such policy  shall be altered or  canceled,  (ii) no act or
default of Obligor  shall affect the right of Agent to recover under such policy
in case of loss or damage,  and (iii) from and after the date,  if any, on which
the insurance  carrier receives notice from Agent that an "Event of Default" has
occurred under this Agreement,  all proceeds  payable under such policy shall be
payable directly to Agent (subject to the rights of holders of Permitted Liens).
Any  amounts  received  under  such  policies  may be  applied  by  Agent to the
Obligations  in such order and at such times as Agent may  determine  or, at the
option of Agent,  released  to Obligor,  provided  that no such  application  or
release shall cure or waive any Event of Default and no amount released shall be
deemed a payment of any  obligations.  In the event Obligor at any time fails to
maintain  any  of  the  policies  of  insurance  required  above  or  equivalent
replacement  policies  or fails  to pay any  premium  in whole or in part,  then
Agent,  without  waiving or  releasing  any of the  Obligations  or any Event of
Default,  may (but shall be under no  obligation  to) obtain and  maintain  such
policies  of  insurance  and pay such  premiums  and take any other  action with
respect thereto that Agent deems advisable.

               6.12  Performance  by the Agent.  If Obligor fails to perform any
material  covenant,   agreement,  duty  or  obligation  of  Obligor  under  this
Agreement, the Agent may, at any time or times in its discretion, take action to
effect  performance of such  obligation.  All  reasonable  expenses of the Agent
incurred in  connection  with the  foregoing  authorization  shall be payable by
Obligor. No discretionary  right, remedy or power granted to the Agent under any
part of this Agreement  shall be deemed to impose any  obligation  whatsoever on
the Agent with respect  thereto,  such rights,  remedies and powers being solely
for the protection of the Agent.

          7. REMEDIAL PROVISIONS.

               7.1 Right to Satisfy Other Claims and Taxes.  If Obligor fails to
pay any governmental  taxes,  assessments or other charges when due, or fails to
pay any claims  secured by any lien  against any  Collateral  when due,  Obligor
shall so advise  Creditor  in  writing  and  Creditor  may,  without  waiving or
releasing  any  obligations  of  Obligor  or any Event of  Default,  in its sole
discretion  (and without any obligation to do so), make such payment or any part
thereof or obtain such discharge and take any other action with respect  thereto
that the Creditor deems advisable.

               7.2 Certain Matters Relating to Receivables.  Creditor shall have
the  right to make test  verifications  of the  Receivables  in any  manner  and
through any medium that it  reasonably  considers  advisable,  and Obligor shall
furnish  all  such  assistance  and  information  as  Creditor  may  require  in
connection with such test verifications. At any time and from time to time, upon
Creditor's  request, at any time after the occurrence and during the continuance
of an Event of  Default  and at the  expense of  Obligor,  Obligor  shall  cause
independent public accountants or others  satisfactory to Creditor to furnish to
the Creditor  statements showing  reconciliations,  aging and test verifications
of, and trial  balances for, the  Receivables.  At Creditor's  request,  Obligor
shall  deliver to Creditor  all  original and other  documents  evidencing,  and
relating to, the agreements and transactions which gave rise to the Receivables,
including,  without  limitation,  all  original  orders,  invoices  and shipping
receipts.  Creditor  in its own  name or in the name of  others  may at any time
communicate  with  obligors  under  the  Receivables  to  verify  with  them  to
Creditor's  satisfaction  the  existence,  amount and terms of any  Receivables,
provided that Creditor  will not make  communications  in its own name unless an
Event of Default has occurred and is continuing. Anything herein to the contrary
notwithstanding,  Obligor shall remain liable under each of the  Receivables  to
observe  and perform  all the  conditions  and  obligations  to be observed  and
performed by it  thereunder,  all in accordance  with the terms of any agreement
giving rise thereto.  Creditor shall not have any obligation or liability  under
any Receivable (or any agreement  giving rise thereto),  by reason of or arising
out of this  Agreement  or the  receipt  by  Creditor  of any  payment  relating
thereto,  nor shall  Creditor be  obligated  in any manner to perform any of the
obligations  of Obligor  under or pursuant to any  Receivable  (or any agreement
giving rise  thereto) to make any payment,  to make any inquiry as to the nature
or the sufficiency of any payment received by it or as to the sufficiency of any
performance  by any party  thereunder,  to present or file any claim to take any
action to enforce any performance or to collect the payment of any amounts which
may have  been  assigned  to it or to which  it may be  entitled  at any time or
times.

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          8. RELEASE OF COLLATERAL.  Except for (i) sales or other  dispositions
of Inventory made prior to the occurrence of an Event of Default that are in the
ordinary  course of  Obligor's  business  and not  prohibited  by any  provision
contained in the  Financing  Documents and (ii) sales or other  dispositions  of
Collateral  for  which  Obligor  obtains  the  prior  written  consent  of Agent
(collectively,  "Permitted  Sales"),  Obligor shall not sell, lease,  license or
otherwise  dispose  of the  Collateral,  or any  part  thereof  or any  interest
therein.  Concurrently with any Permitted Sale, the Security shall automatically
be released  from the  property  so  disposed  of;  provided  however,  that the
Security Interest shall continue in the proceeds thereof.

          9. EVENTS OF DEFAULT.  Each of the following shall constitute an Event
of Default by Obligor:

               a. The occurrence of any event of default as defined in the Notes
or Subscription Agreement.

               b. The  failure of Obligor  to pay any  Obligation  of Obligor to
Creditor when due;

               c.  The  failure  of any  Other  Obligor  to pay any  obligation,
liability or indebtedness of such Other Obligor to Creditor when due;

               d. Any other  failure to observe or perform any of the  covenants
or obligations imposed upon Obligor or any Other Obligor by any of the Financing
Documents,  which failure is  unremedied  for more than 10 days after receipt of
notice thereof from Agent;

               e. The  occurrence  or existence of any other default or Event of
Default under any Financing Document;

               f. Any  representation  or warranty  contained  in any  Financing
Document  or  any  financial  statements,   certificates,   schedules  or  other
information  now or hereafter  furnished by Obligor or any Other Obligor  proves
false or misleading in any material respect;

               g. The  termination  of  existence  or  cessation  of business by
Obligor or any Other Obligor;

               h. The making of an  assignment  for the benefit of  creditors by
Obligor or any Other Obligor;

               i. The  commencement  of any  case or  proceeding  by or  against
Obligor  or  any  Other  Obligor  under  Title  11 of  the  United  States  Code
(Bankruptcy) or of any other  proceeding,  suit or action (at law, in equity, in
Bankruptcy  or  otherwise)  for  adjudication  as  a  bankrupt,  reorganization,
composition,  extension, arrangement,  receivership,  liquidation or dissolution
by, of, or against Obligor or any Other Obligor;

               j. The appointment of a receiver,  trustee,  custodian or similar
officer for or over Obligor or any Other Obligor or any of its  property,  which
is not vacated within 10 days thereafter;

               k. The levy of any writ of  execution or other  judicial  process
upon any of the property of Obligor or any Other  Obligor  which is not released
within 10 days thereafter;

               l. The  uninsured  damage to or  material  decline  in the market
value of the Collateral unless immediately replaced or supplemented by Obligor;

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               m. The  failure  by  Obligor  or any  Other  Obligor  to make any
payment  when  due  (subject  to  any  applicable  grace  period),   whether  by
acceleration or otherwise,  of any other  indebtedness for borrowed money of, or
guaranteed by, Obligor or any Other Obligor,  or default by Obligor or any Other
Obligor in the  performance  or observance of any  obligation or condition  with
respect  to any such  other  indebtedness  if the  effect of such  default is to
accelerate  the  maturity  of any such  indebtedness  or to permit the holder or
holders  thereof,  or any  trustee  or agent  for such  holders,  to cause  such
indebtedness to become due and payable prior to its expressed maturity.

          10. RIGHTS AND REMEDIES OF THE CREDITOR UPON EVENT OF DEFAULT.

               10.1  Disposition  of  Collateral.  Upon and  after  any Event of
Default which is then continuing:

                    (a) The Agent may  exercise  its rights with respect to each
and every  component of the  Collateral,  without regard to the existence of any
other  security or source of payment for the  Obligations.  In addition to other
rights and remedies provided for herein or otherwise  available to it, the Agent
shall  have all of the  rights and  remedies  of a lender on  default  under the
Uniform Commercial Code ("Code") then in effect in the State of New York;

                    (b)  If  any   notice  to  Obligor  of  the  sale  or  other
disposition  of  Collateral is required by then  applicable  law, five (5) days'
prior  notice (or, if longer,  the  shortest  period of time  permitted  by then
applicable  law)  to  Obligor  of the  time  and  place  of any  public  sale of
Collateral  or of the time after  which any private  sale or any other  intended
disposition is to be made, shall constitute reasonable notification; and

                    (c) The Agent is authorized,  at any such sale, if the Agent
deems it advisable to do so, in order to comply with any  applicable  securities
laws,  to restrict the  prospective  bidders or  purchasers  to persons who will
represent and agree, among other things, that they are purchasing the Collateral
for their own account for investment, and not with a view to the distribution or
resale  thereof,  or otherwise to restrict such sale in such other manner as the
Agent deems  advisable  to ensure such  compliance.  Sales made  subject to such
restrictions  shall be deemed to have  been  made in a  commercially  reasonable
manner.

          10.2 Application of Proceeds.  Subject to the rights of any holders of
Permitted  Liens,  any  proceeds  received  by Agent in  respect  of any sale of
collection  from or other  realization  upon  all or any part of the  Collateral
following the occurrence of an Event of Default may, in the discretion of Agent,
be held by Agent  as  collateral  for,  and/or  then or at any  time  thereafter
applied by Agent as follows:  (i) first, to pay all costs,  expenses and charges
of every kind  (including  attorneys'  fees and costs) for pursuing,  searching,
protecting, taking, removing, storing, safekeeping,  caring, preparing for sale,
advertising,  selling and delivering the Collateral and otherwise enforcing this
Agreement and the other Financing Documents; (ii) second, to pay the Obligations
in order determined by Agent in its sole discretion; and (iii) third, to pay the
remaining  funds,  if any,  after  payment of all the  Obligations  in full,  to
Obligor  or to  whomever  may be  lawfully  entitled  to receive  such  surplus.
Payments  received from any third party on account of  disposition of Collateral
shall not reduce the Obligations until paid in cash to Agent. The application of
proceeds  by Agent  shall be  without  prejudice  to Agent 's rights as  against
Obligor  or other  persons  with  respect  to any  Obligations  which may remain
unpaid. Any such deficiency shall be paid forthwith to Agent by Obligor.

          10.3  Notice.  Any  notice  required  to be  given by Agent of a sale,
lease,  or other  disposition  of Collateral,  or any other  intended  action by
Agent,  which is sent at least five (5) days prior to such proposed  action,  or
such longer period as shall be specified by  applicable  law,  shall  constitute
commercially reasonable and fair notice thereof to Obligor.

          10.4 Appointment of Agent as Lawful Attorney:  Other Rights Upon Event
of Default. Obligor hereby irrevocably makes, constitutes and appoints Agent and
all persons  designated by Agent true and lawful  attorney  (and  agent-in-fact)
upon and after the  occurrence of an Event of Default for the purposes set forth

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in the following sentences of this Section.  Upon and after the occurrence of an
Event of Default,  Agent or its agent may, without notice to Obligor and at such
time or  times  thereafter  as Agent or said  agent in its sole  discretion  may
determine, in Obligor's or Agent 's name: (i) give notice to account debtors and
Other Obligors and demand payment of Accounts or other  obligations  included in
the Collateral;  (ii) enforce  payment and exercise all of Obligor's  rights and
remedies with respect to the collection of Accounts,  any Special Collateral and
any other obligations by legal proceedings or otherwise;  (iii) settle,  adjust,
compromise,  discharge, release, extend or renew Accounts and other obligations;
(iv)  prepare,  file and sign  Obligor's  name on any proof of claim or  similar
document in any  insolvency  or similar case  against any Account  debtor or any
person  indebted  to Obligor;  (v) endorse or sign the name of Obligor  upon any
checks, drafts, chattel paper, document, instrument, invoice, freight bill, bill
of lading, or similar document or agreement relating to Accounts,  Inventory, or
Special Collateral;  (vi) use Obligor's  stationery and sign the name of Obligor
to verifications of Accounts and other  obligations to Account debtors and Other
Obligors;  (vii)  use the  information  recorded  on or  contained  in any  data
processing  equipment  and computer  hardware and software to which  Obligor has
access relating to Accounts,  Inventory, or Special Collateral;  (viii) open any
lock box;  (ix) transfer into the name of Agent or the name of Agent 's agent or
nominee any of the Collateral; (x) make, settle and adjust claims under policies
of insurance,  endorse or sign the name of Obligor on any check or other item of
payment  for  the  proceeds  of  such  policies  of  insurance,   and  make  all
determinations  and decisions with respect thereto and (xiii) receive and direct
the disposition of any proceeds of any Collateral.

          11. AGENT'S  EXPENSES,  INCLUDING  ATTORNEYS  FEES.  Regardless of the
occurrence or existence of an Event of Default,  Obligor shall pay to Agent,  on
demand,  the  amount of any costs or  expenses  (including  attorneys'  fees and
expenses)  paid or incurred  at any time or times in  connection  with:  (i) any
attempts to defend,  protect or enforce the  Security  Interest or the  priority
thereof,  including the  discharging of any prior or subsequent  lien or adverse
claim against any Collateral thereof which is not permitted hereunder;  (ii) any
attempt to collect the Obligations or enforce any rights of Agent, whether under
this Agreement or other Financing  Documents,  or otherwise,  against Obligor or
any other person under the Financing Documents; (iii) any litigation, dispute or
proceeding (whether instituted by Agent or any other person) in any way relating
to  Collateral,  this  Agreement,  the other  Financing  Documents  or Obligor's
affairs; or (iv) any amounts expended by Agent under this Agreement;  or (v) the
inspection,  verification,  protection,  collection,  sale, liquidation or other
disposition  of  Collateral.  Additionally,  if any  taxes or  charges  shall be
payable on account of the  execution  or delivery of this  Agreement,  any other
Financing  Documents or the creation of any of the  Obligations by reason of any
existing or hereafter  enacted  federal,  state or other  regulation  or statute
(including any foreign country's regulations or statutes),  Obligor will pay all
such taxes and charges,  including any interest and/or penalty thereon, and will
indemnify  and hold Agent  harmless  from and against  liability  in  connection
therewith.  All obligations  under this Section 11 shall  constitute  additional
Obligations  secured by the  Collateral and shall bear interest at the same rate
as provided for the largest amount of other Obligations.

          12. ASSIGNMENT BY CREDITOR. Obligor agrees that Creditor may assign or
otherwise transfer this Agreement, or any of other Financing Documents,  and may
deliver all or any of the Collateral to the  transferee(s),  who shall thereupon
become  vested  with all the powers and rights in respect  thereto  given to the
Creditor herein or in the Financing  Documents  transferred,  and Creditor shall
thereafter be fully discharged from any liability or responsibility with respect
thereto,  all without  prejudice to the  retention by Creditor of all rights and
powers hereby given with respect to any Financing Documents, instruments, rights
or property not so transferred.

          13. REMEDIES NOT EXCLUSIVE: FORECLOSURES. No right or remedy hereunder
is exclusive of any other right or remedy. Each and every right and remedy shall
be cumulative  and shall be in addition to and without  prejudice to every other
remedy given hereunder,  under any other agreement  between Obligor and Creditor
or now or hereafter existing at law or in equity, and may be exercised from time
to time as often as deemed  expedient,  separately or concurrently.  The giving,


                                       8

taking or enforcement of or execution against any other or additional  security,
collateral,  or guaranty for the payment of the Obligations shall not operate to
prejudice,  waive or affect any rights, powers or remedies hereunder,  nor shall
Creditor be required to first look to, enforce,  exhaust or execute against such
other or  additional  security,  or  guarantees  prior to so acting  against the
Collateral. Creditor may foreclose on or execute against the items of Collateral
in such order as Creditor may, in its sole and unfettered discretion, determine.

          14. WAIVERS.  The failure or delay of Agent to insist in any instances
upon the  performance  of any of the  terms,  covenants  or  conditions  of this
Agreement or other  Financing  Documents,  or to exercise  any right,  remedy or
privilege  herein or  therein  conferred,  shall not impair or be  construed  as
thereafter waiving any such covenants,  remedies,  conditions or provisions, but
every such term,  condition and covenant shall continue and remain in full force
and effect; nor shall any waiver of an Event of Default suspend, waive or affect
any other Event of Default,  whether the same is prior or subsequent thereto and
whether of the same or of a different type.

          15. SEVERABILITY.  Wherever possible, each provision of this Agreement
shall be  interpreted  in such a manner as to be effective.  If any provision of
this  Agreement  shall be held to be prohibited  by or invalid under  applicable
law, such provision shall be ineffective  only to the extent of such prohibition
or  invalidity,  without  invalidating  the remainder of such  provisions or the
remaining provisions of this Agreement.

          16.  TERMINATION.   Upon  payment  in  full  and  performance  of  all
Obligations  owed by Obligor to  Creditor  pursuant to the  Financing  Documents
(including payment in full and performance of all indebtedness,  obligations and
liabilities of other persons  guaranteed by the Obligor) and the  termination of
all obligations of Creditor to extend credit under the Financing Documents, this
Agreement  shall be  terminated;  otherwise  it shall  remain in full  force and
effect.

          17. NOTICE. All notices, demands and communications hereunder shall be
in writing and shall be deemed to be duly  delivered when  personally  delivered
(including by courier or  messenger),  or two (2) business days after deposit in
the United States mail by registered or certified mail, postage prepaid,  return
receipt  requested,  addressed to the parties at the  addresses set forth on the
signature  page  hereof,  or at such  other  address  as any  party  shall  have
furnished to the other parties in writing.

          18. GOVERNING LAW. To the extent  applicable,  this Agreement shall be
governed  by the  Uniform  Commercial  Code of the State of New York (or, to the
extent applicable to the attachment,  perfection, priority or enforcement of the
Security  Interest in any Collateral,  the Uniform  Commercial Code of any other
state).  With  respect to any matters not so covered by the  applicable  Uniform
Commercial Code, this Agreement shall otherwise be governed by the internal laws
of the State of New York.

          19.  ATTORNEYS'  FEES AND OTHER  COSTS.  Should  either  party  hereto
institute any action or proceeding to enforce this  Agreement or any  provisions
hereof or for a declaration of rights under this  Agreement,  or for arbitration
of any dispute  arising under this Agreement,  the prevailing  party in any such
action,  proceeding or  arbitration  shall be entitled to receive from the other
party all costs and expenses, including without limitation reasonable attorneys'
fees,  incurred  by  the  prevailing  party  in  connection  with  such  action,
proceeding or arbitration.

          20.  INDEMNIFICATION.  Obligor  hereby  agrees to  indemnify  and hold
harmless Creditor and Agent and their directors,  officers, employees and agents
against and from any and all claims, actions, liabilities, costs and expenses of
any kind or nature  whatsoever  (including  reasonable fees and disbursements of
counsel) that may be imposed on,  incurred by, or asserted  against any of them,
in any way  relating  to or  arising  out of this  Agreement,  any  exercise  of
remedies  hereunder  or any other  action  taken or omitted  by them  hereunder,
except to the extent a court holds in final and nonappealable judgment that such
claims,  actions,  liabilities,  costs and expenses  directly  resulted from the
gross negligence or willful misconduct of such indemnified Persons.

                                       9

          21. WAIVERS BY THE OBLIGOR.  Except as otherwise expressly provided in
this  Agreement  or the other  Financing  Documents,  the  Obligor  waives:  (i)
presentment,  demand, and protest and notice of presentment,  protest,  default,
non-payment, maturity, release, compromise, settlement, extension, or renewal of
any or all Financing Documents under or pursuant to which Obligor may in any way
be liable and hereby  ratifies  and  confirms  whatever  Creditor may do in this
regard;  (ii) notice prior to taking  possession or control of Collateral or any
bond or security that might be required by any court prior to allowing  Creditor
to exercise  any of  Creditor's  remedies;  (iii) the benefit of all  valuation,
appraisement,  and exemption laws; (iv) any right to require Creditor to proceed
against any other person or collateral held from any other person; (v) any right
to require Creditor to pursue any other remedy in Creditor's  power  whatsoever;
or (vi) any defense  arising out of any  election by Creditor to exercise or not
exercise  any right or remedy it may have against  Obligor,  any other person or
any  security  held by it,  even  though  such  election  operates  to impair or
extinguish any right of reimbursement to subrogation or other right or remedy of
Obligor against any other person or any such security.

          22. MISCELLANEOUS.  Obligor agrees that the following shall govern the
interpretation and enforcement of this Agreement:

               22.1 Binding; on Successors. This Agreement shall be binding upon
Obligor,  the  heirs,  executors,  administrators,  successors  and  assigns  of
Obligor,  and shall inure to the benefit of and be enforceable by Creditor,  its
successors, transferees and assigns.

               22.2  "Obligor."  If this  Agreement  is  executed by two or more
parties  (other  than  Creditor),  they shall be jointly  and  severally  liable
hereunder,  and the word  "Obligor"  wherever  used herein shall be construed to
refer to each of the parties  separately,  all in the same manner,  and with the
same effect as if each of them had signed separate instruments,  and in any such
case,  this Agreement  shall not be revoked or impaired as to any one or more of
such  parties  by the  death  or  dissolution  of any  of the  others  or by the
revocation  or release of any  obligations  hereunder of any one or more of such
parties.

               22.3  Partnerships.  If any party hereto is a  partnership,  this
Agreement shall remain in force and applicable notwithstanding any change in the
individuals  comprising  the  partnership  and  shall  include  any  altered  or
successor partnership, but the predecessor partnerships and their partners shall
not thereby be released from any liability.

               22.4 No Oral  Modifications.  None of the terms or  provisions of
this Agreement may be waived,  altered,  modified,  limited or amended except in
writing.

              22.5 Execution by the Obligor  Sufficient.  This  Agreement  shall
take effect upon the execution  solely by the Obligor but this Agreement may, at
the option of Agent,  be executed by Creditor if execution by Creditor is deemed
desirable by Creditor or is required by the laws of any  jurisdiction to create,
perfect,  preserve,  validate or otherwise protect any security interest granted
pursuant  hereto or to  enable  Creditor  to  exercise  or  enforce  its  rights
hereunder with respect to any such security interest.

               22.6  Section  Titles.  The  section  titles  contained  in  this
Agreement are merely for convenience and shall be without substantive meaning or
content.

               22.7 Construction.  The word "including" shall have the inclusive
meaning  represented by the phrase "including  without  limitation."  Unless the
context of this Agreement clearly otherwise  requires,  the word "or" shall have
the meaning represented by the phrase "and/or," references to the plural include
the singular and references to the singular include the plural.

          23. WAIVER OF JURY TRIAL.  Obligor and Creditor each  irrevocably  and
unconditionally waive trial by jury in any action or proceeding relating to this
Agreement or any other Financing Document and for any counterclaim therein.


                                       10

          IN WITNESS WHEREOF, this Agreement is executed and delivered as of the
date first set forth above.

CREDITOR:                                          OBLIGOR:

VERTICAL CAPITAL PARTNERS, INC., as Agent          APPLIED DNA SCIENCES, INC.

By:/S/Robert DePalo                               By:/S/ Peter Brockelsby
   ----------------                               -------------------
   Printed Name: Robert DePalo                    Printed Name: Peter Brockelsby
   Title: Chairman                                Title: President

Mailing Address:                                   Mailing Address:



Facsimile:
Telephone:                                         Facsimile:
                                                   Telephone:
AGENT:

VERTICAL CAPITAL PARTNERS, INC.


By:/S/Robert DePalo
   ----------------
   Printed Name: Robert DePalo
   Title: President


Mailing Address:



Facsimile:
Telephone:


                                       11