Figure 3. Gene presence/absence map of the pangenome of 31 isolates from cholera toxin‒positive Vibrio cholerae serogroups. The red rectangle in the accessory genome indicates the conserved unique coding sequences that are specific to the serogroup O141. Each serogroup is associated with a color block: O37 (red), O1 (orange), O139 (dark blue), O141 (purple), O75 (Marron). Scale bar indicates nucleotide substitutions per site.