Streptavidin, Produced by the bacterium Streptomyces avidinii, Each

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Has four binding sites for biotin, as does avidin. Both have been used extensively as probes in immunochemical systems, conjugated to antibodies, enzymes or fluorochromes.Format: Off-white clumpy powderExtinction Coefficient (E1%): E1% = 34 at 280nm (solvent: 0.1 M ammonium perchlorate, pH 8.0)(Lit.)Specific Activity: ∽10units/mg protei