The right. Gaps (green boxes) indicate the positions of additional spacers in the genomes not shown here. Red lines indicate spacers shared in all three genomes, heavy black lines indicate spacers shared in just two species, and thin black lines indicate spacers that are similar but not identical between two species.Copyright information:Taken from "Genome sequence and rapid evolution of the rice pathogen pv. oryzae PXO99"http://www.biomedcentral.com/1471-2164/9/204BMC Genomics 2008;9():204-204.Published online 1 May 2008PMCID:PMC2432079.