KOHN, R R Aging of human collagen in relation to susceptibility to the action of collagenase. [electronic resource] - Journal of gerontology Jan 1960 - 10-4 p. digital Publication Type: Journal Article ISSN: 0022-1422 Standard No.: 10.1093/geronj/15.1.10 doi Subjects--Topical Terms: AgingCollagenCollagenasesEndopeptidasesHydrolasesPeptide Hydrolases--pharmacology