Figure 4  Phylogenomic trees obtained by comparing genomic fingerprints with UFC-13. The similarity between the two methods used for classifying the Bacillus anthracis strains shows the degree of sensitivity necessary to distinguish between closely similar strains. (A) Virtual Hybridization of 15,264 probes under relaxed conditions, with ΔG° values between −19.53 and −11.67 kcal/mol; (B) Virtual Hybridization of 15,264 probes under strict conditions, with ΔG° values between −19.53 and −13.01 kcal/mol. Both taxonomic trees show that Bacillus anthracis str. Kruger B is the one most distant from Bacillus anthracis str. Ames.