ID 3.4.23.3 DE gastricsin. AN pepsin C. CA More restricted specificity than pepsin A, but shows preferential CA cleavage at Tyr-|-Xaa bonds. High activity on hemoglobin. CC -!- Formed from progastricsin, apparently in the gastric juice of most CC vertebrates. CC -!- In addition to the fundus, progastricsin is also secreted in antrum CC and proximal duodenum. CC -!- Seminal plasma contains a zymogen that is immunologically identical CC with progastricsin. CC -!- Belongs to peptidase family A1. CC -!- Formerly EC 3.4.4.22. DR Q9N2D3, PEPC_CALJA ; Q64411, PEPC_CAVPO ; P20142, PEPC_HUMAN ; DR P03955, PEPC_MACFU ; Q9D7R7, PEPC_MOUSE ; P30879, PEPC_PIG ; DR Q9GMY2, PEPC_RABIT ; P04073, PEPC_RAT ; Q9GMY3, PEPC_RHIFE ; DR Q9GMY4, PEPC_SORUN ; P81498, PEPC_SUNMU ; //