AFFX Affymetrix, Inc.

Affymetrix, Inc. (Nasdaq:AFFX) today announced it will webcast its presentation at the Lehman Brothers Healthcare Conference in Miami Beach, FL. Doug Farrell, Vice President of Investor Relations, will provide a company overview at 4:45 p.m. ET on Tuesday, March 20th. A webcast of the presentation will be available live and by replay. To access both the live and archived webcast, please go to www.affymetrix.com and click on the "Investors" link. The archived replay will be available 24 hours after the live presentation and will be accessible for 30 days. About Affymetrix Affymetrix GeneChip� microarray technology is the industry-standard tool for analyzing complex genetic information. After inventing microarray technology in the late 1980s, Affymetrix scientists have been dedicated to developing innovative products that provide researchers with a more complete view of the genome. These products continue to accelerate genetic research and enable scientists to develop diagnostics and tailor treatments for individual patients by identifying and measuring the genetic information associated with complex diseases. Today, 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 1,500 systems have been shipped around the world and more than 8,500 peer-reviewed papers have been published using the technology. Affymetrix is headquartered in Santa Clara, Calif., and has manufacturing facilities in Sacramento, Calif., and Singapore. The company has about 1,100 employees worldwide and maintains sales and distribution operations across Europe and Asia. For more information about Affymetrix, please visit the company�s website at www.affymetrix.com. NOTE: Affymetrix, the Affymetrix logo and GeneChip� are registered trademarks owned or used by Affymetrix Inc.