Conversion of major ginsenoside Rb1 to 20(S)-ginsenoside Rg3 by Microbacterium sp. GS514

Fig. 2. Biotransformation pathway for production of ginsenoside Rg3 (1) from Rb1 (2). (a) Ginsenoside Rb1 (2) was converted to ginsenoside Rg3 (1) via Rd (2); (b) ginsenoside Rb1 (2) was converted to ginsenoside Rg3 (1) directly.