FIG. 2.

Accumulation of betaine in response to osmotic stress. Closed squares indicate [methyl-¹⁴C]betaine accumulation in H37Rv, open squares indicate accumulation by H37Rv in medium with 0.25 M NaCl, closed circles indicate accumulation by H37RvΔproXVWZ, and open circles indicate accumulation by H37RvΔproXVWZ in medium with 0.25 M NaCl. Data points are the means of three individual samples, and error bars indicate standard deviations.