Figure 3
Chemical (red arrows) and biological (green arrows) synthesis of serinol. Catalysts are highlighted in red, enzymes are marked in green. R1 and R2 correspond to alkoxy groups, R3 and R4 represent C1-C10 alkyl, C3-C10 cycloalkyl or aryl group, or form together a C4-C10 alkylene group. AMDH: amino alcohol dehydrogenase, RtxA: dihydroxyacetone phosphate aminotransferase/dihydrorhizobitoxin synthase. Until now only the transaminase RtxA of B. elkanii is described. Another one is assumed for sugarcane.