ID 3.4.22.27 DE cathepsin S. CA Similar to cathepsin L, but with much less activity on Z-Phe-Arg-|-NHMec, CA and more activity on the Z-Val-Val-Arg-|-Xaa compound. CC -!- A lysosomal cysteine endopeptidase that is unusual among such enzymes CC for its stability to neutral pH. CC -!- Belongs to peptidase family C1. DR P25326, CATS_BOVIN ; Q8HY81, CATS_CANLF ; P25774, CATS_HUMAN ; DR O70370, CATS_MOUSE ; Q02765, CATS_RAT ; Q8HY82, CATS_SAIBB ; //