Figure 5.

Two- and three-dimensional similarity plots comparing the distribution of orthologs on the chromosomes of B. licheniformis, B. subtilis and B. halodurans. BLAST scores were generated and dots were positioned according to the locations in the genome where orthologs exist in order to view possible regions of possible colinearity. The minimum BLAST expectancy score for each dot in this example was 1 × 10^-50. (a) The plot for B. licheniformis versus B. subtilis; (b) B. halodurans versus B. subtilis; (c) B. licheniformis versus B. halodurans; (d) a three-dimensional scatter plot comparing the distribution of orthologs among all three species. Dots located on the diagonal are indicative of conserved location of orthologous genes between species, whereas a line of dots that lie perpendicular to the diagonal suggests an inversion of a genomic segment between species.