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DNA PLANT TECHNOLOGY TO RECEIVE PATENT FOR NEW GENETIC TECHNOLOGY TO COVER ALL PLANTS

 CINNAMINSON, N.J., June 22 /PRNewswire/ -- DNA Plant Technology Corporation (NASDAQ: DNAP) today announced it had received notification from the U.S. Patent Office for expanded patent coverage of its Transwitch(TM) gene suppression technology for use in all plants.
 TRANSWITCH technology is a breakthrough in genetic engineering that can be used to improve quality and yield performance in crops, and is the only practical alternative to another gene suppression method for plants called antisense. Antisense is currently encumbered by patent disputes.
 TRANSWITCH technology is at the core of DNAP's plant genetic engineering program. It is expected to be an additional source of revenues through third party licensing agreements.
 DNAP has used TRANSWITCH technology to prevent overripening in tomatoes, allowing development of full flavor and nutritional potential on the vine and extended shelf life. TRANSWITCH technology is also being used to improve texture and sweetness in such products as peppers, cherry tomatoes, and sugar snap peas that DNAP is currently developing for FreshWorld, DNAP's joint venture in branded produced with DuPont.
 "Undisputed patent protection of our TRANSWITCH technology will allow DNAP to maintain its leadership position in plant genetic engineering," said DNAP President and Chief Executive Officer Robert Serenbetz. "Several companies are now embroiled in patent disputes concerning antisense -- leaving no clear path for use of this method by any third party."
 "Gene suppression in plants will likely be required for at least half of all plant genetic engineering during the next decade," says DNAP Executive Vice President John Bedbrook, who was instrumental in developing TRANSWITCH technology in early experiments to change flower color. "In our development studies, TRANSWITCH gene suppression has shown three to five times higher efficiency over antisense technology. This is an important cost advantage in carrying our genetic engineering."
 DNA Plant Technology is a leading agricultural biotechnology company, applying a spectrum of technologies to develop and commercialize plant-based products and environmental diagnostic products for consumer and industrial markets. The company has two major operating joint ventures -- FreshWorld in premium fruits and vegetables, and InterMountain Canola Company in special varieties of edible canola oil.
 -0- 6/22/93
 /CONTACT: Stacy Berns, or Cara Kiewel both of Edleman Worldwide, 212-704-8111, for DNA Plant Technology Corporation/
 (DNAP)


CO: DNA Plant Technology Corporation ST: New Jersey IN: MTC SU:

LD-MG -- NY004 -- 4369 06/22/93 08:16 EDT
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Publication:PR Newswire
Date:Jun 22, 1993
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