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Enzymatic activity of UDP-glucosyltransferase purified from L. pneumophila and recombinant E. coli. Approximately 0.5 μg of purified native protein (lanes 1 and 3) or recombinant protein (lanes 2 and 4) was incubated in the presence of [14C]UDP-glucose with (lanes 1 and 2) or without (lanes 3 and 4) HeLa cell extract. After this, the samples were subjected to SDS-PAGE, dried, and exposed to X-ray film.
