Acetylating agents such as acetic anhydride react preferentially with primary amines, iodoacetate reacts preferentially with sulfhydryl groups, and atp-dependent kinases preferentially add a phosphoryl group to side-chain hydroxyl or phenolic −oh groups. which amino acid side chains, or main chain groups, in a polypeptide are most likely to be modified by treatment with: part a acetic anhydride check all that apply. check all that apply. glutamine arginine lysine asparagine proline n-terminal amine
