Figure 2

Hierarchical clustering of the taxonomical distribution of periplasmic copper homeostasis proteins. Optimization of the profile by protein presence with clades representing taxonomic categories at the genus level organized according to their phylogenetic distribution. Five protein clusters were identified (marked with dots) according to their clustering value as described in Materials and Methods. Shade scale represents the fractional abundance of a seed protein within a genus, a value corresponding to the percentage of genomes where a given ortholog was identified. The number of genomes in each genus is indicated in parenthesis.