TLC-based analyses of biotransformation by BglQM and BglQM1. S, S1, S2, and S3, ginsenoside standards; 1, substrate Re; 2, biotransformation of Re by BglQM; 3, biotransformation of Re by BglQM1; 4, substrate Rg1; 5, biotransformation of Rg1 by BglQM; 6, biotransformation of Rg1 by BglQM1; 7, substrate Rb1; 8, biotransformation of Rb1 by BglQM; 9, substrate Rb2; 10, biotransformation of Rb2 by BglQM; 11, substrate Rc; 12, biotransformation of Rc by BglQM.