Conservation of PrcB, PrcA and PrtP in T. denticola strains. Deduced amino acid sequences were aligned using Clustal-W. The consensus sequence of each protein, numbered as for 35405, is shown above the aligned sequences. Mismatches from the consensus are shaded black, and gaps in the consensus are shaded grey. Predicted PrtP active site residues (Asp203, His258 and Ser447) are indicated by asterisks below the consensus sequence.