Figure 1. Morphology and β-Lactamase Activity of the lsr2::Tn5370 Mutant in M. smegmatis .
(A) Magnification of individual colonies. Left, wild-type NJS20.w (control); center, NJS20.1 (lsr2 transposon mutant); right, NJS20.1c (complemented lsr2 transposon mutant).
(B) Overall morphology and color of the two strains. Left, NJS20.w; right, NJS20.1