4H4F1133076701ENSG00000162438ENSMUSG00000062478Q99895Q3SYP2NM_007272NM_001033875NP_009203NP_001029047Chymotrypsin C, also known as caldecrin or elastase 4, is an enzyme that in humans is encoded by the CTRC gene. Chymotrypsin C, also known as caldecrin or elastase 4, is an enzyme that in humans is encoded by the CTRC gene. Chymotrypsin C is a member of the peptidase S1 family. The encoded protein is a serum calcium-decreasing factor that has chymotrypsin-like protease activity.