title: Changes in the proportion of collagen type IV with age--possible role in transport processes.
mesh_terms: D000375:Aging; D000818:Animals; D001485:Basement Membrane / Q000378:metabolism; D001693:Biological Transport, Active; D002417:Cattle; D003094:Collagen / Q000378:metabolism / Q000502:physiology*; D006224:Cricetinae; D006801:Humans; D007672:Kidney Cortex / Q000378:metabolism; D008297:Male; D051381:Rats
chemical_list: D003094:Collagen