Figure 1

Comparison of the growth of B. subtilis wild type (WT) and yqiX mutant (BFS4740) in different concentrations of arginine as the nitrogen source in glucose minimal medium (from 10 µM to 20 mM; note that arginine is toxic at 20 mM). Both strains were grown at 37°C with agitation (180 rpm). The OD was taken for both strains after 8 h growth, when they entered stationary phase (due to nitrogen limitation, except for the highest arginine concentrations).