4.2.1.78 (S)-reticuline biosynthesis (S)-reticuline biosynthesis 4.2.1.78 (S)-reticuline biosynthesis I - 4.2.1.78 Biosynthesis of secondary metabolites - 4.2.1.78 Isoquinoline alkaloid biosynthesis - 4.2.1.78 Metabolic pathways -