This family is found at the N terminus of several carboxypeptidase Y proteins and contains a signal peptide and pro-peptide regions [1,2].

1: Cloning and characterization of the Pichia pastoris PRC1 gene encoding carboxypeptidase Y. Ohi H, Ohtani W, Okazaki N, Furuhata N, Ohmura T; Yeast 1996;12:31-40. PMID:8789258

2: Characterization of the Hansenula polymorpha CPY gene encoding carboxypeptidase Y. Bellu AR, van der Klei IJ, Rechinger KB, Yavuz M, Veenhuis M, Kiel JA; Yeast 1999;15:181-189. PMID:10077185