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Wilmington, August 15, 2005

DuPont Qualicon and Applied Biosystems Sign Alliance Agreement for Advanced Food Testing Systems

DuPont Qualicon today announced the signing of an agreement with Applied Biosystems Group (NYSE:ABI), an Applera Corporation business, by which the two businesses will jointly develop and market new BAX® system applications for the food industry.

The BAX® system already uses the power of polymerase chain reaction (PCR) to detect microorganisms in food. Innovations in DNA technology from Applied Biosystems will now provide additional capabilities, such as quantitation, strain discrimination and other benefits of great value to the food industry.

“This alliance will bring real value to our food customers by translating unique DNA technology improvements into new applications, especially in the area of food quality testing,” said Kevin Huttman, president of DuPont Qualicon. “We are very pleased to be working with Applied Biosystems on the next generation of BAX® system applications to meet the diverse needs of the global food industry.”

“Applied Biosystems’ TaqMan® assays are already widely used in research laboratories around the world, and their sensitivity and versatility makes them ideal for application in the food manufacturing environment,” added Mark P. Stevenson, President of the Applied Markets Division for Applied Biosystems. “DuPont Qualicon with its leadership position in DNA testing in the food industry is a logical partner for us as we continue to take the opportunity to leverage AB’s experience and success in the life science research market into applied markets.”

Food processing companies around the world rely on the BAX® system to detect pathogens or other organisms in raw ingredients, finished products and environmental samples. The automated system uses leading-edge technology, including PCR assays, tableted reagents and optimized media, to detect the bacteria of most concern to food processors and regulators.

With certifications and regulatory approvals in the Americas, Asia and Europe, the BAX® system is recognized globally as the most advanced pathogen testing system available to food companies. DuPont Qualicon also markets the patented RiboPrinter® system, the world’s only automated DNA fingerprinting instrument to track and trend bacterial contamination in pharmaceuticals, personal care products and food. For more information and product photos, visit http://www.qualicon.com

DuPont is a science company. Founded in 1802, DuPont puts science to work by creating sustainable solutions essential to a better, safer, healthier life for people everywhere. Operating in more than 70 countries, DuPont offers a wide range of innovative products and services for markets including agriculture, nutrition, electronics, communications, safety and protection, home and construction, transportation and apparel.

Forward-Looking Statements: This news release contains forward-looking statements based on management’s current expectations, estimates and projections. All statements that address expectations or projections about the future, including statements about the company’s strategy for growth, product development, market position, expected expenditures and financial results are forward-looking statements. Some of the forward-looking statements may be identified by words like “expects,” “anticipates,” “plans,” “intends,” “projects,” “indicates,” and similar expressions. These statements are not guarantees of future performance and involve a number of risks, uncertainties and assumptions. Many factors, including those discussed more fully elsewhere in this release and in documents filed with the Securities and Exchange Commission by DuPont, particularly its latest annual report on Form 10-K and quarterly report on Form 10-Q, as well as others, could cause results to differ materially from those stated. These factors include, but are not limited to changes in the laws, regulations, policies and economic conditions, including inflation, interest and foreign currency exchange rates of countries in which the company does business; competitive pressures; successful integration of structural changes, including restructuring plans, acquisitions, divestitures and alliances; cost of raw materials, research and development of new products, including regulatory approval and market acceptance; and seasonality of sales of agricultural products.