Fig. 2 in Establishing the metabolic network of isoquinoline alkaloids from the Macleaya genus

Fig. 2. Proposed metabolic network of isoquinoline alkaloids in the Macleaya genus. a the solid arrow represents verified biosynthesis pathways; b the dotted arrow represents unverified pathways, c the double arrow represents two or more steps needed for biosynthesis; d MT, GOA, and COA are abbreviation for methyl transferase, glycosyltransferase, and cyclooxygenase, respectively; e the red moieties represent the changed substituent groups, and f the blue moieties represent the 13C -labeled benzene ring. (For 6 interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)