title: Collagen structure: evidence for a helical organization of the collagen fibril.
mesh_terms: D000328:Adult; D000368:Aged; D000375:Aging; D000818:Animals; D003094:Collagen / Q000032:analysis; D006168:Guinea Pigs; D006801:Humans; D066298:In Vitro Techniques; D007223:Infant; D008297:Male; D008854:Microscopy, Electron; D008958:Models, Molecular; D011487:Protein Conformation / Q000187:drug effects; D011489:Protein Denaturation; D012867:Skin / Q000032:analysis / Q000648:ultrastructure; D012997:Solvents / Q000494:pharmacology
chemical_list: D012997:Solvents; D003094:Collagen