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Contribution of betaine catabolism to osmotolerance. B728a and the ΔgbcAB mutant were grown in MinA-succinate with 0.3 M or 0.6 M NaCl and betaine, and growth in microtiter plates was monitored based on optical density. The asterisk indicates differences between B728a and the ΔgbcAB mutant at 0.3 M NaCl (P < 0.05). Values are means ± SEM (n = 4). GB, glycine betaine.
