asymmetric cleavage of the pepsin-treated procollagens with a fibroblast collagenase locates the abnormal segment amino terminal to the cleavage site , and analysis of cyanogen bromide peptides of collagenase cleavage peptides and of whole collagens indicates that the abnormal segment is in either the alpha 2cb3 peptide or the short segment of alpha 2cb5 amino terminal to the collagenase site of the altered alpha 2 chain .
C0033235
procollagens
C0009325
collagens