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Selected phenol-coupling reactions of alkaloid biosynthesis. Berbamunine synthase (CYP80A1) catalyzes the C-O intermolecular phenol-coupling reaction of bisbenzyisoquinoline alkaloid biosynthesis. (S)-Corytuberine synthase (CYP80G2) catalyzes formation of the intramolecular C-C phenol-couple in magnoflorine biosynthesis. Salutaridine synthase forms the C-C intramolecular phenol-couple of salutaridine in morphine biosynthesis.
