Chromosome alignment of PD X. fastidiosa Temecula and CVC X. fastidiosa 9a5c. (A) Nucleotide sequence alignment of both genomes, starting at the putative origins of replication, as determined with MUMmer. (B) Chromosome backbones of both genomes, showing the relative positions, sizes, and orientations of colinear chromosome regions detected in panel A. The direction of the arrow within each chromosome fragment indicates its relative orientation. Black triangles illustrate the positions of phage-related regions and genomic islands within each chromosome.