Figure 4

Barcode representations of the rank-BLAST vector of three conserved ribosomal proteins and their corresponding clusters. The rank-BLAST profile of each cluster was constructed by calculating the mean position in the cluster of each of the 243 database species (i.e., for each database species we calculated its mean position in the individual vectors of all protein-members of the cluster). Each line in the barcode represents a species. The color code represents the phylogenetic proximity between the species in the vector (database species) and the species dominating the cluster (listed on top), i.e., the species coding the majority of the proteins in the cluster (specificity of the clusters is described at Figure 3). The 50S ribosomal protein L27 (rpl27) is the conserved protein from cluster 1. The 50S ribosomal protein L2 (rpl2) is the conserved protein from cluster 2. The 50S ribosomal protein L21 (rpl21) is the conserved protein from cluster 6.