Construction of M. smegmatis Δ gplH. (A) Scheme illustrating the deletion in the chromosome of Ms ΔgplH. The position of each primer used in this study is shown. (B) Scheme of the gplH deletion cassette-delivery suicide vector used for construction of Ms ΔgplH. The gplH deletion leaves behind a gene remnant coding for only the first 13 (black print) and last 4 (white print) amino acids of GplH. This gene remnant in ΔgplHc is flanked by ~1 kb of downstream and upstream WT sequence for homologous recombination with the chromosome. (C) Agarose gel electrophoresis showing PCR-based confirmation of the gplH deletion in Ms ΔgplH. Lanes: 1, Ms WT (2,239-bp amplicon expected with primers pepOF and pepOR); 2, Ms ΔgplH (2,068-bp amplicon expected with primers pepOF and pepOR); 3, Ms WT (278-bp amplicon expected with primers pepF and pepR); 4, Ms ΔgplH (101-bp amplicon expected with primers pepF and pepR); L, DNA ladder marker.