These serine proteases include several eukaryotic enzymes such as lysosomal Pro-X carboxypeptidase, dipeptidyl-peptidase II, and thymus-specific serine peptidase.

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2: Identification and characterization of prolylcarboxypeptidase as an endothelial cell prekallikrein activator. Shariat-Madar Z, Mahdi F, Schmaier AH; J Biol Chem 2002;277:17962-17969. PMID:11830581

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6: Chromosomal localization of two mouse genes encoding thymus-specific serine peptidase and thymus-expressed acidic protein. Carrier A, Wurbel MA, Mattei MG, Kissenpfennig A, Malissen M, Malissen B; Immunogenetics 2000;51:984-986. PMID:11003393

7: Cloning of a novel MHC-encoded serine peptidase highly expressed by cortical epithelial cells of the thymus. Bowlus CL, Ahn J, Chu T, Gruen JR; Cell Immunol 1999;196:80-86. PMID:10527559