Fig. 4.

Phylogenetic distribution of HARP. Condensed phylogenetic tree of HARPs. Bacteria were condensed at order level, Archaea at phylum level. Bootstrap values are indicated at the branches (inferred from 1,000 replicates). Filled and empty circles indicate the presence or absence, respectively, of RNase P RNA (RNA subunit), the bacterial RNase P protein (RnpA), or the archaeal RNase P protein subunits Pop5/Rpp30; half-filled circles indicate that we identified for (at least some) bacterial species in this order only an Rpp30 (white/black circles) or Pop5 homolog (black/white circle), but not both.