AFFX Affymetrix, Inc.

Affymetrix Inc., (Nasdaq:AFFX) and CapitalBio Corporation, a leading life science company based in Beijing, P.R. China, announced today that CapitalBio has become a certified Affymetrix Service Provider and will begin offering genotyping services using the Affymetrix GeneChip(R) Human Mapping 500K Array Set. The 500K Array enables researchers to search across the entire genome in detail to find genes involved in disease or drug response. CapitalBio has been offering gene expression profiling services using Affymetrix microarray technology for more than a year. The two companies have also been working together on joint R&D and commercialization programs, including the development of an advanced GeneChip-compatible personal scanner. "The gene expression and genotyping market are gaining momentum as more and more international pharmaceutical companies out-source microarray services in China and more and more Chinese scientists employ microarrays to solve biological problems," said David Sun, senior vice president, Business Development and Marketing at CapitalBio. "As a Certified Affymetrix Service Provider, CapitalBio can now provide broader high quality microarray based services beyond its already extensive products and services to gain information at gene, protein, cell and tissue levels to address the increasing needs of global customers." "CapitalBio has been offering microarray services using Affymetrix technology for more than a year and has demonstrated its ability to provide quality services using 500K arrays," said Wei Zhou, vice president and country manager of China at Affymetrix. "Affymetrix is committed to enabling the Chinese scientific community to access to all of the statistical power in the Affymetrix genotyping arrays to gain a better understanding of the genetic causes of complex disease." About CapitalBio CapitalBio is a leading life science Company that develops and commercializes a broad range of products, including Biochip technology products, for drug discovery research, genomics, proteomics, bio-safety testing and clinical applications. Headquartered in Beijing, China, CapitalBio has rapidly evolved from a young innovative biochip developer into a comprehensive life science entity with five affiliates or subsidiaries: AVIVA Biosciences, a San Diego, California based company that develops and markets on-chip patch-clamp technologies for ion-channel studies for drug discovery researches; Chipscreen Biosciences, a Biotech company located in Shenzhen, China, for small molecular drug discovery and development; and CapitalBio International and CapitalBio Hong Kong, two fully owned subsidiaries by CapitalBio Corporation, are based at San Diego, California and Hong Kong, China respectively. Additional information on CapitalBio can be found at www.capitalbio.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 manufacturing facilities in Sacramento, Calif., and Bedford, Mass. The company maintains important sales and marketing operations in Europe and Asia and has about 1,100 employees worldwide. For more information about Affymetrix, please visit the company's website at www.affymetrix.com. All statements in this press release that are not historical are "forward-looking statements" within the meaning of Section 21E of the Securities Exchange Act as amended, including statements regarding Affymetrix' "expectations," "beliefs," "hopes," "intentions," "strategies," or the like. Such statements are subject to risks and uncertainties that could cause actual results to differ materially for Affymetrix from those projected, including, but not limited to: uncertainties relating to the genotyping services that CapitalBio will offer, risks of the Company's ability to achieve and sustain higher levels of revenue, higher gross margins, reduced operating expenses; uncertainties relating to technological approaches, manufacturing, product development; personnel retention; uncertainties related to cost and pricing of Affymetrix products; dependence on collaborative partners; uncertainties relating to sole source suppliers; uncertainties relating to FDA and other regulatory approvals; competition; risks relating to intellectual property of others and the uncertainties of patent protection and litigation. These and other risk factors are discussed in Affymetrix' Form 10-K for the year ended December 31, 2005, and other SEC reports, including its Quarterly Reports on Form 10-Q for subsequent quarterly periods. Affymetrix expressly disclaims any obligation or undertaking to release publicly any updates or revisions to any forward-looking statements contained herein to reflect any change in Affymetrix' expectations with regard thereto or any change in events, conditions or circumstances on which any such statements are based. NOTE: Affymetrix, the Affymetrix logo, and GeneChip are registered trademarks owned or used by Affymetrix Inc. CapitalBio, and the CapitalBio logo, and Capital Biochip are registered trademarks owned or used by CapitalBio Corporation. AVIVA, Chipscreen are registered trademarks owned or used by AVIVA Biosciences and Chipscreen Biosciences respectively.