catalytic activity:Preferential cleavage: Arg-|-Xaa, Lys-|-Xaa.,cofactor:Binds 1 calcium ion per subunit.,similarity:Belongs to the peptidase S1 family.,similarity:Contains 1 peptidase S1 domain.,tissue specificity:Pancreas and brain.,
Secreted .
Detected in pancreas and pancreatic fluid (at protein level) (PubMed:6698368). Expressed in pancreas and brain (PubMed:8294000). Detected in ileum (PubMed:12021776).