Advanced ChemTech Aldrich Chemical Co. Inc. American Biorganics Inc. American Peptide Co. Ltd. Aminotech Inc. AMRESCO Inc. Applied Science Labs Atomergic Chemetals Corp. Bachem Inc. Bio-Rad Laboratories Inc. CALBIOCHEM AG Cambridge Research Biochemicals Ltd. Chemical Dynamics Corp. Daiichi Pure Chemicals Co. Ltd. Eastern Chemical Div. of United-Guardian Corp. Fluka Chemie AG ICN Biochemicals Inc. Janssen Chemica MilliGen/Bioresearch MSD Isotopes Novabiochem Peninsula Laboratories Inc. Penta Manufacturing Co. Peptide Innovations Inc. Polysciences Inc. Reanal Factory of Laboratory Chemicals Research Plus Inc. Serva/Crescent Chemical Co. Inc. Spectrum Chemical Mfg. Corp. Star Biochemicals Inc. TA Biochemicals Inc. United States Biochemical Corp. Wako BioProducts