Accurate Chemical & Scientific Corp. Acros Chimica American Bioanalytical Inc. American International Chemical American Synthesis Inc. Amersham Pharmacia Biotech Becton Dickinson & Co. Binding Site Inc. BIO 101 Inc. Bioprobe Systems Bio-Rad Laboratories Inc. BIOS Corp. Biosoft Boehringer Mannheim GmbH Calbiochem/Novabiochem International Clontech Laboratories Inc. Diversified Biotech EM Science Inc. Epicentre Technologies Corp. Fisher Scientific Co. Fluka Chemie AG FMC BioProducts FOTODYNE Inc. Gibco BRL Div. of Life Technologies Inc. Helena Laboratories ICN Biochemicals Inc. Integrated Separation Systems Enprotech Intermountain Scientific/BioExpress Isolab Inc. Mallinckrodt Baker B.V. Mallinckrodt Chemicals Inc. Merck KGaA Midwest Scientific NBS Biologicals Nest Group Inc. New Brunswick Scientific Co. Inc. Owl Scientific Inc. Perkin-Elmer Corp. Schleicher & Schuell GmbH Scientific Imaging Systems Div. of Eastman Kodak Serva/Crescent Chemical Co. Inc. Sigma Chemical Co. Spectrum Chemical Mfg. Corp. Stratagene GmbH Thomas Scientific United States Biochemical Corp.