Isolation and characterization of the cyanogen bromide peptides derived from the human alpha 2(V) collagen chain

The human alpha 2(V) collagen chain when cleaved with cyanogen bromide yields ten peptides which can be recovered in approximately equimolar quantities. Characterization of the purified peptides with regard to molecular weight and amino acid composition establishes the uniqueness of the peptides and reveals that the alpha 2(V) chain recovered following limited pepsin digestion contain 956 amino acid residues. Possible homologies between the alpha 2(V) peptides and peptides derived from other collagen chains were noted. In addition, a high-performance liquid chromatography system is described for the separation of three of the alpha 2(V) chain peptides which were not resolved by using conventional separation techniques.