AFFX Affymetrix, Inc.

Affymetrix Inc. (Nasdaq:AFFX) announced today the publication of its April 24, 2006 issue of the Affymetrix Microarray Bulletin (AMB), which focuses on new methods to integrate and analyze whole-genome association data. Headlines for week of April 24, 2006: Custom-Built Data Repository Speeds Obesity Association Study Analysis -- To read the AMB interview with Marc Lenburg of Boston University School of Medicine (BUSM), please visit: http://www.microarraybulletin.com/lenburg Integrating Whole-Genome Linkage, Association and Expression Data in Complex Neuropsychiatric Disease -- To register for the April 27th AMB Symposia conference call featuring Frank Middleton, Ph.D. of the Center for Neuropsychiatric Genetics at Upstate Medical University in Syracuse, NY, please visit: http://www.microarraybulletin.com/symposia Headlines for week of April 17, 2006: Researchers Discover Genetic Variant Associated with Obesity in Humans -- To watch the AMB interview with Alan Herbert, M.B., Ch.B., Ph.D. and Michael Christman, Ph.D. of BUSM, please visit: http://www.microarraybulletin.com/obesity -- To watch the April 20th AMB Symposia conference call featuring Alan Herbert, Ph.D. and Marc Lenburg, Ph.D. of BUSM, please visit: http://www.microarraybulletin.com/obesitysymposia -- To view the workflow for the obesity association study, please visit: http://www.microarraybulletin.com/obesityworkflow About AMB: Affymetrix Microarray Bulletin (AMB) is a magazine published by Affymetrix that highlights leading microarray research and diagnostic developments around the world. AMB features interviews by and for scientists, statisticians and software engineers -- one expert interviewing another. Our goal is to create a forum where this community can discuss research and share new resources and information. For more information about AMB, please visit the publication's website at www.microarraybulletin.com. 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 1,400 systems have been installed around the world and nearly 4,000 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 analyzing the relationship between genetics and health. Affymetrix is headquartered in Santa Clara, Calif. with subsidiaries in Europe and Asia, as well as manufacturing facilities in Sacramento, Calif. and Bedford, Mass. The company has about 1,000 employees worldwide. 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.