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. 2013 Sep 4;8(9):e74731. doi: 10.1371/journal.pone.0074731

Figure 7. Proposed minor pathways in steviol glycoside biosynthesis.

Figure 7

Dotted blue lines and green text boxes indicate the alternate steps and enzymes and substrates engaged in the synthesis of stevioside and rebaudioside A. Present study proposes the catalytic activity of enzyme SrUGT76G1 on substrates 19-O-β-glucpyranosyl steviol and rubusoside, suggesting its involvement in alternate steviol glycoside biosynthesis.