Figure 5. SDS-PAGE analysis of basal expression of PUL in different recombinants.

Lane M: protein molecular weight marker; Lane 1: total protein of E. coli BL21(DE3)/pET22b(+); Lane 2: total protein of E. coli BL21(DE3)/pET22b(+)-pul; Lane 3: total protein of E. coli BL21(DE3)/pET22b(+)-pulΔlac.