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SDS-PAGE electrophoretogram of E. coli BL21 total proteins. Lane M: protein molecular weight standards. Lanes 1–7: containing the expression vector pGEX-gs16f12, pGEX-gs16f8, pGEX-gs16f4, pGEX-gs16f3, pGEX-gs16f2, pGEX-gs16f1, and pGEX-AgeI, respectively. Lane 8: not containing the expression vector.
