Fig 2.

The phylogenetic extent of the core endosporulation machinery reveals that a substantial part of the machinery is restricted to endosporulating species. Proteins are grouped according to the regulatory protein that controls their production (top), species are shown on the NCBI taxonomic tree (left), and lifestyle is denoted by color, with endosporulators, exosporulators, mycobacteria, and nonendosporulators shown in blue, pink, green, and red, respectively. The presence of an orthologue for a given protein in a given species is indicated by a black dot.