catalytic activity:Similar to cathepsin L, but with much less activity on Z-Phe-Arg-|-NHMec, and more activity on the Z-Val-Val-Arg-|-Xaa compound.,function:Thiol protease. Key protease responsible for the removal of the invariant chain from MHC class II molecules. The bond-specificity of this proteinase is in part similar to the specificities of cathepsin L and cathepsin N.,similarity:Belongs to the peptidase C1 family.,subunit:Monomer.,
Lysosome . Secreted . Cytoplasmic vesicle, phagosome .
Alveolar macrophage,Pancreas,Testis,