Phylogenetic relationships and domain architectures of NlpC/P60 family proper. The phyletic pattern of each family is shown next to the clade. The RELL bootstrap values for the major branches are shown at their base. The width of a given clade is approximately proportional to number proteins contained within it. N-term is a specific amino-terminal module that is restricted to the Cj0946 clade. The domain abbreviations are: SLT, soluble lytic transglycosidase. The signal peptides are shown as black rectangles, while the transmembrane regions are shown as yellow rectangles. The species abbreviations are given in the legend to Figure 1.