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SDS-PAGE analysis of the expression of pGEX-4T-1/HP-NAP in E. coli. Lane 1: Protein marker; Lane 2: pGEX-4T-1 before induction; Lane 3: pGEX-4T-1 after induction; Lane 4: pGEX-4T-1/HP-NAP before induction; Lane 5: pGEX-4T-1/HP-NAP after induction; Lane 6: Supernatant of E. coli after induction; Lane 7: Lysate of E. coli after induction.
