AFFX Affymetrix, Inc.

Affymetrix to Webcast Presentation at U.S. Bancorp Piper Jaffray Health Care Conference SANTA CLARA, Calif., Jan. 20 /PRNewswire-FirstCall/ -- Affymetrix, Inc. (NASDAQ:AFFX) today announced that Greg Schiffman, Senior Vice President and CFO, will provide a company overview at the U.S. Bancorp Piper Jaffray Health Care Conference in New York. A live transmission of the presentation will take place at 12:30 p.m. ET on Thursday, January 27, 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 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 of Investor Relations, of Affymetrix, Inc., +1-408-731-5285 Web site: http://www.affymetrix.com/

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