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Biotinylation - (May/21/2013 )

Hi,

Does anybody know if there is any commercial product of Sulfhydryl Biotin? I need it to add it to the maleimide group to react together.

Many thanks.

-Elham Mollazade-

Pierce and Sigma got Biotinylation kits. But I couldn't find this chemical in Sigma.

-Curtis-