Allied International Fund, Inc.
                           Members NASD, SIPC and MSRB
                               488 Madison Avenue
                               New York, NY 10022
                               Tel (212) 446-0006
                               Fax (212) 446-0020

                                                       February 03, 2006

Dr. James Hayward
Applied DNA Sciences
25 Health Sciences Drive
Stony Brook, NY

Re: APDN Promissory Note

Dear Dr. Hayward:

Please  be  advised  that  we are  hereby  extending  the  Maturity  Date of the
Promissory  Note dated November 3, 2006 for $550,000 ( the "Note") from February
3, 2006 to a new  Maturity  Date of April 1, 2006.  All other  terms of the Note
shall remain the same.

                                                 Regards;

                                                 Allied International Fund, Inc.


                                                 Rosemarie DePalo, President
Cc:
    Andrea Cataneo, Esq.
    Gary Schoenwald
    Ronald Heineman