FIG. 1.
Schematic depiction of the location of the six CBA efflux heavy metal systems in the M. xanthus genome. (A) M. xanthus genome map with the positions of copper region 1 (CR1), copper region 2 (CR2), and the dispersed czc2, cus3, and czc3 systems. (B) Genes located in copper region 1. (C) Genes located in copper region 2. (D) Genetic environment of the czc2 system. (E) Genetic environment of the cus3 system. (F) Genetic environment of the czc3 system. The numbers indicated at the top of the first and last genes in each panel correspond to their identifiers in the M. xanthus genome. Paralogous genes are represented with the same color. Blue, cus systems; green, czc systems; orange, P1B-ATPases; yellow, MCOs. The rest of the genes are depicted as gray arrows.