HERCULES, Calif., December 11, 2007 – Bio-Rad Laboratories, Inc. (AMEX: BIO and BIOb), a multinational manufacturer and distributor of life science research and clinical diagnostic products, today announced the availability of a new product guide (bulletin 5603), that describes how researchers can optimize transfections in mammalian cells using Bio-Rad’s new Gene Pulser® MXcell™ electroporation system and Gene Pulser electroporation buffer.