AFFX Affymetrix, Inc.

Affymetrix to Webcast Presentation at the Banc of America Securities Health Care Conference SANTA CLARA, Calif., May 14 /PRNewswire-FirstCall/ -- Affymetrix, Inc. today announced that senior management will provide a company overview at the Banc of America Securities Health Care Conference at the Four Seasons Hotel in Las Vegas. A live transmission of the presentation will take place at 3:20 PM (PDT) on Thursday, May 20, 2004. 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 is a pioneer in creating breakthrough tools that are driving the genomic revolution. By applying the principles of semiconductor technology to the life sciences, Affymetrix develops and commercializes systems that enable scientists to improve the quality of life. The Company's customers include pharmaceutical, biotechnology, agrichemical, diagnostics, and consumer products companies, as well as academic, government, and other non-profit research institutes. Affymetrix offers an expanding portfolio of integrated products and services, including its integrated GeneChip(R) brand platform to address the growing markets focused on understanding the relationship between genes and human health. Additional information on Affymetrix may be found at http://www.affymetrix.com/. DATASOURCE: Affymetrix, Inc. CONTACT: Doug Farrell, Vice President, Investor Relations, of Affymetrix, +1-408-731-5285 Web site: http://www.affymetrix.com/

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