ABI/Advanced Biotechnologies Inc. ABI/Advanced Biotechnologies Inc. Acros Chimica Aldrich Chemical Co. Inc. American Bioanalytical Inc. Amersham Pharmacia Biotech Atomergic Chemetals Corp. Becton Dickinson & Co. Binding Site Inc. BioClinical Systems Inc. bioMerieux Vitek Inc. Biotec-Fischer GmbH CALBIOCHEM AG Calbiochem/Novabiochem International Crescent Chemical Co. Inc. Curtin Matheson Scientific Inc. Difco Laboratories Diversified Biotech EM Science Inc. Fisher Scientific Co. Fluka Chemie AG Gibco BRL Div. of Life Technologies Inc. ICN Biochemicals Inc. INTEGRA Biosciences AG Intermountain Scientific/BioExpress Merck KGaA New Brunswick Scientific Co. Inc. Pall Gelman Sciences Inc. Polysciences Inc. Quality Biological Inc. Schlueter Instruments Corp. Serva/Crescent Chemical Co. Inc. Sigma Chemical Co. Spectrum Chemical Mfg. Corp. Thomas Scientific United States Biochemical Corp. VWR Scientific Products