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SDS-PAGE analysis of the purified xylanases obtained from E.coli BL21. Lane 1: 100 mM imidazole wash of the recombined protein XYNB to Ni-nitrilotriacetic acid resin; Lane2: 100 mM imidazole wash of the recombined protein XYNA1 to Ni-nitrilotriacetic acid resin; M: Standard protein molecular weight. The protein gels were stained with Coomasie Brilliant Blue R250. →:interest proteins
