Applied DNA Sciences Secures Laser Toners

STONY BROOK, NY, Apr 20 (MARKET WIRE) --
Applied DNA Sciences, Inc. (OTCBB: APDN), a provider of DNA-based
security solutions, announced today that it has developed a
patent-pending system to help mitigate loss of revenue, product recalls
and compromised warranties caused by toxic supply chains. It has
previously filed a patent to cover its proprietary system and methods for
secure document printing and detection of cartridges and laser toners that
have been counterfeited or diverted to a secondary, grey market.

Harold Schofield, Schofield Imaging Associates, "Fighting back against
counterfeiters is a win-win situation for manufacturers, businesses and
ultimately the consumer. By protecting the toner and the cartridge itself
with DNA, you have a much better chance of authenticating a genuine
product from a fake. This makes it an ideal solution for protecting brand
integrity and performance in commercial and consumer usage."

SigNature(R) DNA is infinitely variable. Specific DNA sequences can be
used to mark the outside of the toner cartridge or the toner powder
itself.

-- Limits the infiltration of illegal toners into re-manufactured
cartridges - Imaging Supplies Coalition estimates that fake ink and toner
cartridges resulted in a $2 billion loss to its member companies in 2003
(including Brother, Canon, Epson, Hewlett-Packard, Samsung, Lexmark, Oki
Data, Sharp Electronics, Toshiba, and Xerox).
-- Securing the Cartridge - use security marks with DNA on the outside of
the cartridge to help prevent illegally re-manufactured cartridges from
entering the marketplace.
-- Help Protect Printer Devices - against the use of illegal cartridges
that force repairs and invalidate warranties.
-- Enhance Safeguarding of Retailers and Manufacturers - against the
infiltration of illegal cartridges into the supply chain.
-- Empowering Consumers, Corporations, and Governments alike - to print
secure documents that can be traced to a single, specific toner cartridge.

Dr. Benjamin Liang, Chief Technology Officer, stated, "SigNature DNA
persists in toner ink and also after it is printed on paper. It does not
alter the quality of the ink or printed material. We can authenticate our
DNA from laser ink in a non-destructive manner."

SigNature DNA in Laser Printed Documents

With the dawn of the information age came the ability to duplicate,
change, alter and distribute virtually any printed document at little or
no cost. Measures to defend against counterfeited documents are being
taken by many corporations, but until now, there has been no
comprehensive, systematic and cost effective solution to prevent
counterfeiting or diversion.

"DNA can be used to provide a singular identifier that can be used to mark
extremely valuable documents," stated Dr. James Hayward, CEO, APDN. "With
DNA in laser toner, a conventional printer can now be used as an
affordable method to print any secure document. Wills, stock
certificates, birth certificates, and even official government documents
such as social security cards can benefit from DNA."

Portfolio of DNA Security Inks

This invention extends APDN's growing body of work in the protection of
secure documents and expands upon its successes with security inks,
including: intaglio, inkjet, thermal transfer, UV-curable, screen printed,
flexographic and offset printed inks.

APDN is soliciting commercial partners and will officially unveil its
Signature DNA in Toner success at IMI's 12th Annual Toner Conference in
Phoenix, Arizona, May 4-6, 2009, and 20th Annual Thermal Conference in
Orlando, Florida, May 11-13, 2009 (www.imiconf.com).

About APDN

APDN sells patented DNA security solutions to protect products, brands and
intellectual property from counterfeiting and diversion. SigNature DNA is
a botanical mark used to authenticate products in a unique manner that
essentially cannot be copied. APDN also provides BioMaterial
GenoTyping(TM) by detecting genomic DNA in natural materials to
authenticate finished products. Both technologies protect brands and
products in a wide range of industries and provide a forensic chain of
evidence that can be used to prosecute perpetrators. To learn more, go to
www.adnas.com.

The statements made by APDN may be forward-looking in nature and are made
pursuant to the safe harbor provisions of the Private Securities
Litigation Reform Act of 1995. Forward-looking statements describe APDN's
future plans, projections, strategies and expectations, and are based on
assumptions and involve a number of risks and uncertainties, many of which
are beyond the control of APDN. Actual results could differ materially
from those projected due to our short operating history, limited financial
resources, limited market acceptance, market competition and various other
factors detailed from time to time in APDN's SEC reports and filings,
including our Annual Report on Form 10-K, filed on December 16, 2008 and
our subsequent quarterly reports on Form 10-Q. APDN undertakes no
obligation to update publicly any forward-looking statements to reflect
new information, events or circumstances after the date hereof to reflect
the occurrence of unanticipated events.

INVESTOR CONTACT:
Debbie Bailey
631-444-8090
fax: 631-444-8848

MEDIA CONTACT:
Janice Meraglia
631-444-6293
fax: 631-444-8848

FCMN Contact:
Email Contact
Web site: http://www.adnas.com

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