Caldecrin is a novel-type serine protease expressed in pancreas, but its homologue, elastase IV, is an artifact during cloning derived from caldecrin gene.
Yoshino-Yasuda I, Kobayashi K, Akiyama M, Itoh H, Tomomura A, Saheki T. J Biochem. 1998 Mar; 123(3):546-54.