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SDS-PAGE analysis of recombinant L. pneumophila UDP-glucosyltransferase. Lane 1, crude lysate of E. coli BL21(p28b-13); lane 2, purified recombinant UDP-glucosyltransferase; lane 3, UDP-glucosyltransferase purified from L. pneumophila; lane 4, molecular mass markers (94, 67, 43, 30, 20, and 14 kDa). Because of its N-terminal polyhistidine tag, the recombinant enzyme migrated more slowly than the native enzyme.
