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GbcAB is involved in the betaine catabolism pathway in P. syringae B728a. (A) Choline and betaine degradation pathway and the enzymes that are involved; B728a has a higher uptake capacity for choline than for betaine. (B) Growth of the ΔgbcAB mutant and B728a in MinA medium with 20 mM betaine or dimethylglycine based on optical density of cultures in test tubes. Values are means ± standard errors of the means (SEM) (n = 3).
