Cell Biosciences Announces Issuance of Three US Patents

SANTA CLARA, California, May 9, 2011 - Cell Biosciences, Inc. today announced the issuance of three key patents
by the United States Patent and Trademark Office, Patent Nos. 7,935,489,
7,935,308 and 7,935,479.

These patents address central aspects of Cell Biosciences' NanoPro(TM)
Assay Technology. NanoPro assay systems utilize novel approaches to protein
capture and detection to enable high-sensitivity measurement of specific
proteins in complex biological samples. These patents each focus on the
fundamental capture and detection methodologies at the core of NanoPro Assay
Technology.

"We are extremely pleased by the issuance of these key patents,"
commented Bob Gavin, Vice President of Product Development at Cell
Biosciences. "As we expand the NanoPro product line into new markets, a
strong intellectual property position will become increasingly important."

ABOUT CELL BIOSCIENCES

Cell Biosciences is a private life sciences company focused on defining
the future of protein analysis. The Company develops instrumentation systems,
software and assay products that help researchers better understand proteins
for fundamental research, biotherapeutics production, biomarker discovery and
personalized medicine. With an installed base of over 10,000 systems, its
customers include leading research institutions, pharmaceutical and
biotechnology companies worldwide. Cell Biosciences is headquartered in Santa
Clara, California. For more information, visit
www.cellbiosciences.com.

Trent Basarsky, Vice President of Corporate Development, Cell Biosciences, Inc., +1-408-510-5547, tbasarsky at cellbiosciences.com