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SDS-PAGE analysis of the expressed recombinant L-DZNR-His. M, molecular mass standards (kDa); lane 1, crude cell extract from E. coli BL21(DE3)/pET-E1-His; lane 2, crude cell extract from E. coli BL21(DE3)/pET21a. Recombinant L-DZNR-His (approximately 70 kDa) is indicated by the arrow.
