Comparison of amino-acid sequences of (A) cPRP1 with bPRP1 cluster and (B) cPRP6 with bPRP6. Residues identical to cPRP1 (A) or cPRP6 (B) are shown in black boxes. Amino acid sequences were aligned with assistance from Clustal W 1.83 on the DDBJ web site. The arrow indicates the putative primary cleavage site of the signal peptide of cPRP1 or cPRP6. The potential N-glycosylation site is underlined with a red line.