. "Belongs to peptidase family A1." . "Weakly inhibited by pepstatin." . "Can partially substitute for kexin in a deficient strain of Saccharomyces cerevisiae." . "The homologous product of the MKC7 gene (S.cerevisiae) has similar catalytic activity and has been termed yapsin 2." . . . "Yapsin 1" . "Aspartic proteinase 3" . "Yeast aspartic protease 3" . "Hydrolyzes various precursor proteins with Arg or Lys in P1, and commonly Arg or Lys also in P2. The P3 amino acid is usually non-polar, but otherwise additional basic amino acids are favorable in both non-prime and prime positions." .