title: Effect of age on the crystallinity of collagen. II. Density, reactivity, and composition.
mesh_terms: D000375:Aging / Q000502:physiology*; D000596:Amino Acids / Q000032:analysis; D000818:Animals; D003094:Collagen / Q000032:analysis; D006909:Hydroxyproline / Q000032:analysis; D003012:Microbial Collagenase; D051381:Rats
chemical_list: D000596:Amino Acids; D003094:Collagen; D003012:Microbial Collagenase; D006909:Hydroxyproline