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TLC analysis of GOS consumption by wild-type L. reuteri 6475 and the ΔlacS mutant. Shown are spent medium of the wild type at 12 and 24 h (lanes 1 and 2), 1% GOS-mMRS medium (lanes 3 and 6), and spent medium of the mutant at 12 and 24 h (lanes 4 and 5). DP, estimated degree of polymerization. The chromatogram is a composite of lanes (1 to 3 and 4 to 6) from the same TLC plate.
