Accurate Chemical & Scientific Corp. Affinity BioReagents Inc. Amersham Pharmacia Biotech ANTIGENIX AMERICA Inc. ATCC (American Type Culture Collection) Atom S.A. Becton Dickinson & Co. Behring Diagnostics Inc. Binding Site Inc. Biocell Laboratories Inc. Biocientifica S.A. Bio-Clin Inc. BIODESIGN International Biomeda Corp. Biomedical Technologies Inc. Biometra GmbH Bio-Rad Laboratories Inc. Bioreclamation Inc. Bios GmbH Labordiagnostik Biosource International Biotecx Laboratories Inc. Boehringer Mannheim GmbH CALBIOCHEM AG Calbiochem/Novabiochem International Cambridge Research Biochemicals Ltd. C-C Biotech Corp. Chemicon International Inc. CMPS Cortex Biochem Inc. Dako A/S Diagast Laboratories Srl Diagnostica Stago DiaMed Inc. Difco Laboratories Enzyme Research Laboratories Ltd. Eppendorf 5 Prime Inc. Ets. A. de BOURNONVILLE & Fils S.A. Fortron BIO Science Inc. Helena Laboratories HRP Inc. ICN Biochemicals Inc. IDS Ltd. Immuno Diagnostics Center Inc. Immuno-Mycologics Inc. Instruchemie B.V. International Enzymes Inc. Jackson ImmunoResearch Laboratories Inc. Kem-En-Tec A/S Laboratoires Eurobio Laboratori B.D.T. Laboratorios Knickerbocker S.A.E. Medix Biotech Inc. MELJA Diagnostik GmbH Neosystem S.A. New Brunswick Scientific Co. Inc. Nordic Immunological Laboratories Novagen Inc. Oncogene Science Inc. Organon Teknika N.V. Pel-Freez Peninsula Laboratories Inc. PeproTech Inc. Pierce Chemical Co. Polysciences Inc. Promega Corp. Protos ImmunoResearch Research Diagnostics Inc. Research Genetics Sanbio B.V. Biological Products Serotec Ltd. Sigma Chemical Co. Techland S.A. Techniclone International UCB-Bioproducts S.A. United States Biochemical Corp. Vector Laboratories Ltd. Wako BioProducts Zymed Laboratories Inc.