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Growth of DC3000 and various mutants in 1/2-21C medium that lacked succinate and contained 0.3 M of NaCl and was unamended (•), amended with 1 mM of choline (▪), or amended with 1 mM of glycine betaine (▿). Mutants are designated by their PSPTO numbers. Values are the means ± SEM for three to six replicates. pKO, pKnockout.
