2.1.1.116 additional information the enzyme is central to the biosynthesis of tetrahydroisoquinoline-derived alkaloids 2.1.1.116 S-adenosyl-L-homocysteine + (S)-reticuline - 2.1.1.116 S-Adenosyl-L-methionine + 3'-hydroxy-N-methyl-(S)-coclaurine - 2.1.1.116 S-Adenosyl-L-methionine + 3'-hydroxy-N-methyl-(S)-coclaurine the enzyme catalyzes the last step in (S)-reticuline biosynthesis