Figure 4.

(A) 5-week biofilm cultures of wild-type Mtb and Δrv0101 Mtb. The latter biofilm was fragile, thin, and absent in the reticular pattern. (B) Chemical complementation of M. tuberculosis Δrv0101 strain with kupyaphores. Growth curves for WT and Δrv0101 deletion mutants complemented with or without 200 nM 1a or 1c measured by the optical density at 600 nm (OD600) in Chelex-processed Sauton’s medium supplemented with 0.1 μM ZnII. (C) The extracted ion chromatograms of the natural and synthetic C18 kupyaphore 1c at m/z 848.6987 (ΔM ± 5 ppm) on LC–MS (ESI+).