CAS 9013-20-1 appears in our catalog under these names: Streptavidin, Streptomyces avidinii , Streptavidin from Streptomyces avidinii, Streptavidin, Streptavidin 1PC X 100MG, Streptavidin 1PC X 10MG. Offered by: Thermo Scientific (Alfa Aesar), TCI, Biosynth, Sigma-Aldrich, Chemat. Available pack sizes: 2mg, 10mg, -, 5mg, 25mg, 50mg, 100mg, 1GM.