AFFX Affymetrix, Inc.

Affymetrix to Webcast Presentation at the Lehman Brothers Global Healthcare Conference SANTA CLARA, Calif., March 24 /PRNewswire-FirstCall/ -- Affymetrix, Inc. (NASDAQ:AFFX) today announced that Greg Schiffman, Executive Vice President and CFO, will provide a company overview at the Lehman Brothers Global Healthcare Conference in Miami Beach, Florida. A live transmission of the presentation will take place at 5:15 PM ET/2:15 PM PT on Thursday, March 31st 2005. An archived webcast will be available for 30 days. To access the live webcast or archived presentation, please go to http://www.affymetrix.com/ and click on the "Investors" link. About Affymetrix Affymetrix scientists invented the world's first high-density microarray in 1989 and began selling the first commercial microarray in 1994. Since then, Affymetrix GeneChip(R) technology has become the industry standard in molecular biology research. Affymetrix technology is used by the world's top pharmaceutical, diagnostic and biotechnology companies as well as leading academic, government and not-for-profit research institutes. More than 1,200 systems have been installed around the world and nearly 3,000 peer-reviewed papers have been published using the technology. Affymetrix' patented photolithographic manufacturing process provides the most information capacity available today on an array, enabling researchers to use a whole-genome approach to analyze the relationship between genetics and health. Affymetrix is headquartered in Santa Clara, Calif., with manufacturing facilities in Sacramento, Calif., and Bedford, Mass. The company maintains important sales and marketing operations in Europe and Asia and has about 900 employees worldwide. DATASOURCE: Affymetrix, Inc. CONTACT: Doug Farrell, Vice President of Investor Relations of Affymetrix, Inc., +1-408-731-5285 Web site: http://www.affymetrix.com/

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