ABI/Advanced Biotechnologies Inc. Accurate Chemical & Scientific Corp. Amersham Pharmacia Biotech Binding Site Inc. BIODESIGN International Biomedical Technologies Inc. Bio-Rad Laboratories Inc. Bioreclamation Inc. Biosource International Calbiochem/Novabiochem International Chemicon International Inc. CMPS Dako A/S Difco Laboratories Genzyme Diagnostics International HRP Inc. ICN Biochemicals Inc. Immuno Diagnostics Center Inc. Immuno-Mycologics Inc. Medix Biotech Inc. MELJA Diagnostik GmbH New Brunswick Scientific Co. Inc. Nordic Immunological Laboratories Oncogene Science Inc. PeproTech Inc. Polysciences Inc. Sigma Chemical Co. Unisyn Technologies Inc. United States Biochemical Corp. Wako BioProducts Zymed Laboratories Inc.