Growth of RVW7. (A) Growth of M. tuberculosis in LIM with different nitrogen sources. Circles, asparagine; squares, NH4Cl; diamonds, glycine. WT samples, solid lines with filled symbols; RVW7, dotted lines with empty symbols. (B) Growth in LIM with alanine. Circles, WT; squares, RVW7; triangles, RVW7(pAld-Gen21). The standard deviations are shown.