Figure 3.

Expression and purification analysis of PsLeuDH. Lane 1: molecular weight standard marker; Lane 2: crude extract from the BL21/pET-28a (+); Lane 3: crude extract from the BL21/pET-28a (+)-PsLeuDH with IPTG induction; Lane 4: rPsLeuDH eluted with 50 mM imidazole; Lane 5: rPsLeuDH eluted with 100 mM imidazole.