HERCULES, CA – February 13, 2008 – Bio-Rad Laboratories, Inc. (AMEX: BIO and BIOb), a multinational manufacturer and distributor of life science research and clinical diagnostic products, announced today the availability of application note (bulletin 5567A) entitled “Molecular Weight Estimation and Quantitation of Protein Samples Using Precision Plus Protein™ WesternC™ Standards, the Immun-Star™ WesternC™ Chemiluminescent Detection Kit, and the Molecular Imager® ChemiDoc™ XRS Imaging System.”