ID 3.4.24.14 DE procollagen N-endopeptidase. AN procollagen N-proteinase. CA Cleaves the N-propeptide of collagen chain alpha1(I) at Pro-|-Gln and of CA alpha1(II) and alpha2(I) at Ala-|-Gln. CC -!- Removes N-terminal propeptides of type I and II collagens prior to CC fibril assembly. CC -!- Does not cleave type III procollagen. CC -!- Belongs to peptidase family M12. DR P79331, ATS2_BOVIN ; O95450, ATS2_HUMAN ; Q8C9W3, ATS2_MOUSE ; //