An Ehrlich chromogen in collagen cross-links.
A well-characterized three-chain peptide [(Col1)2 X T9] from human type III collagen was a rich source of Ehrlich chromogen. The corresponding two-chain peptide [(Col1)2] was not, implying that the Ehrlich chromogen is a trifunctional cross-link. (Col1)2 X T9 also contained pyridinoline, which is not an Ehrlich chromogen. The 7S domain of type IV collagen also contained an Ehrlich chromogen.
D000596:Amino Acids / Q000032:analysis; D001547:Benzaldehydes; D002863:Chromogenic Compounds; D003094:Collagen; D006801:Humans; D007202:Indicators and Reagents; D010455:Peptides / Q000032:analysis*; D011487:Protein Conformation
D000596:Amino Acids; D001547:Benzaldehydes; D002863:Chromogenic Compounds; D007202:Indicators and Reagents; D010455:Peptides; C015484:pyridinoline; D003094:Collagen; C510241:p-dimethylaminobenzaldehyde