Figure 1.

Integron gene-cassette arrays and array dynamics of Vibrio isolates cultured from coral mucus. Integron gene-cassette arrays are drawn to scale with each cassette boxed. Dark gray cassettes represent those that have no known homologs. The light gray ORFs that flank some of the integrons correspond to putative acetyltransferase (A), hypothetical unknown (H) and sodium-solute symporter (S) proteins. IntI ORFs are shown in red, whereas the white cassettes are those that have pairwise nucleotide sequence BSR values >0.70 to cassettes encoded by other more evolutionary distant Vibrio spp. not accounted for in this figure (none of these are like any other in this figure). White circles represent sequence gaps ∼10 kbp for V5H5 and an unknown value for V5D6. Cassettes that are shared between the different Vibrio isolates cultured from coral mucus are colored accordingly and are assigned a family number that is consistent with how cassette families are named in this study. Colored bars connecting cassettes common to different isolates indicate the dynamic nature of integrons between closely related bacteria.