BIOBASE's ExPlain(TM) Analysis System and TRANSFAC(R) Database Achieve GeneChip-compatible(TM) Status with Affymetrix GeneChip(R) Microarray Platform

BIOBASE announced today that it has joined the Affymetrix
GeneChip-compatible Applications Program, and its ExPlain(TM) Analysis
System and TRANSFAC(R) database has achieved GeneChip-compatible(TM)
status with the Affymetrix Inc. (Nasdaq: AFFX) GeneChip(R) microarray
platform. As a GeneChip-compatible software provider, BIOBASE is
committed to seamlessly integrating its applications with the
Affymetrix GeneChip platform.

BIOBASE's award winning ExPlain(TM) Analysis System provides a
novel, fully integrated analysis pipeline for explaining biology on
the levels of transcription regulation and pathway analysis. In
addition, TRANSFAC(R) provides data on transcription factors, their
experimentally-proven binding sites, and regulated genes. Both
products offer the ability to analyze high throughput experimental
data such as Affymetrix microarrays for the identification of future
research targets.

According to Holger Karas, Senior Vice President of Business
Development, "Combining the vast repository of information available
in our products with Affymetrix and the GeneChip-compatible
Applications Program offers our customers an unparalleled opportunity
to advance their current research and quickly develop experimental
direction for future study."

"Affymetrix is pleased to welcome BIOBASE to the family of
GeneChip-compatible software providers," said Steve Lincoln, vice
president of Informatics at Affymetrix. "The coupling of the rich
content of TRANSFAC with the analytical methods in ExPlain can result
in a greater understanding of disease states and their associated
biological processes to users of GeneChip microarrays."

About BIOBASE GmbH

BIOBASE (www.biobase-international.com), based in Wolfenbuttel
(Germany), with branch offices in Beverly, MA (USA) and Bangalore
(India) is the leading provider of expertly-curated biological
databases and sophisticated software tools. The BIOBASE Knowledge
Library includes but is not limited to the TRANSFAC(R), TRANSPATH(R),
YPD(TM)and HumanPSD(TM) databases. In combination, the systems biology
analysis platform ExPlain(TM) offers the identification of molecular
networks and key molecules critical to discovery research. BIOBASE
also provides a growing portfolio of databases of third parties such
as BRENDA(R) and HGMD(R). Our customers include the leading academic
and research institutions around the world. For more information,
please visit our website at www.biobase-international.com.

ABOUT THE AFFYMETRIX DEVELOPERS' NETWORK (ADN)

Through one of the largest third-party software developer
communities within the life science industry, Affymetrix works with
its software developers to provide a broad spectrum of solutions for
leveraging gene expression and genetic variation analysis in both
biomedical research and development. Membership in ADN is free of
charge for both commercial and academic software developers. For more
information please visit www.affymetrix.com/genechip/developer. View
the GeneChip-compatible Software Solutions Catalog at
www.affymetrix.com/genechip/compatible.

About Affymetrix

Affymetrix GeneChip(R) 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.