FIG 1.

Schematic representation of the organization of the two cbb₃ operons and the ccoGHIS gene cluster on the P. stutzeri ZoBell chromosome. Genes are denoted by arrowheads according to their encoded products. cbb₃ operon ccoNOP-1 and ccoNOPQ-2 are shown in black and white, respectively. The ccoGHIS gene cluster (in gray) is located downstream of ccoNOQP-2 and is important for the assembly of the cbb₃-CcOs. The FNR box is found in the upstream region of ccoN-1. Three homologous regions (H1, H2, and H3) used for recombination are shown in boxes. The regions deleted and replaced with a kanamycin gene in deletion strains lacking Cbb₃-1 and Cbb₃-2 are indicated as dashed lines. Length standard (1 kb) is shown on the right.