Region containing citrus-canker specific effector genes xopE3 and xopAI. The XAC region depicted is hypothesized to be a genomic island . The central parts of this region (gray areas) are CC-specific, being present in both XauB and XauC as well as in XAC plasmid pXAC64. Gene mltB is not an effector but plays a role in Type III secretion.
Moreira et al. BMC Genomics 2010 11:238 doi:10.1186/1471-2164-11-238