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Do you provide counterion exchange for our peptides?

Yes, Bio-Synthesis provide peptide counterion exchange as specified by our customer. In general, peptide are delivered as trifluoroacetate (TFA) salts. Peptide TFA salts can be used for most cell cultures and a range of in vivo experiments. However, some cell cultures that are sensitive to the TFA counterion, and in some in vivo experiments TFA salts cannot be used. For these applications Bio-Synthesis recommend that peptides are delivered as chloride or acetate salts which are natural counterions. Please specified peptide counterion  exchange when placing an order.