title: Evidence for progressive, age-related structural changes in post-mature human collagen.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D055598:Chemical Phenomena; D002621:Chemistry; D002850:Chromatography, Gel; D003094:Collagen / Q000032:analysis / Q000302:isolation & purification; D003124:Colorimetry; D003964:Diaphragm / Q000032:analysis; D006801:Humans; D006863:Hydrogen-Ion Concentration; D006909:Hydroxyproline / Q000032:analysis; D007192:Indenes; D007202:Indicators and Reagents; D007659:Ketones; D007700:Kinetics; D008297:Male; D003012:Microbial Collagenase; D008875:Middle Aged; D012965:Sodium Chloride; D012995:Solubility; D014325:Tromethamine
chemical_list: D007192:Indenes; D007202:Indicators and Reagents; D007659:Ketones; D014325:Tromethamine; D012965:Sodium Chloride; D003094:Collagen; D003012:Microbial Collagenase; D006909:Hydroxyproline