Fig. 2

Effects of initial cinnamic acid concentration on whole-cell biotransformation. Conditions: 5.7–18 mM cinnamic acid, 55 mM glucose, wet cells (OD_{600 nm} 50), 100 mM phosphate buffer (pH 7.5), 200 rpm, 42 °C, 3 mL final volume; the reaction lasted 2 h under the above conditions, with the different letters representing significant differences between the treatment means (p < 0.05)