Biochemistry Endocrinology 171039a5 Epinephrine is synthesized from norepinephrine by A Hydroxylation B N-methylation C Deamination D Carboxylation High-Yield Explanation Norepinephrine can be conveed into epinephrine by the enzyme phenylethanolamine N-methyltransferase with S-adenosyl-L-methionine as cofactor.