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Thin-layer chromatogram of 14C-labeled sugar intermediates of CP synthesis with isolated membranes of various E. coli strains expressing type Ia cps genes (pBAPE, pBAPF, pBAPG, pBAPI, and pBAPJ). TLC plates were developed twice for the clone pBAPJ. Added UDP-monosaccharides are shown below the chromatograms. Lac, lactose.
