Alignment of the chromosomes of strains 2336 (top) and 129Pt (bottom) using MAUVE 2. Identically colored boxes, known as locally collinear blocks (LCBs), depict homologous regions in the two chromosomes. The edges of LCBs indicate chromosome rearrangements due to recombination, insertions, and/or inversions. Sequences of strain 129Pt inverted in relation to those of strain 2336 are shown as blocks below the horizontal line. The vertical lines connect regions of homology among the two chromosomes. Numbers above the maps indicate nucleotide positions within the respective chromosomes.