title: Collagen fibrils with straight and helicoidal microfibrils: a freeze-fracture and thin-section study.
mesh_terms: D000818:Animals; D001011:Aorta / Q000648:ultrastructure; D002356:Cartilage / Q000648:ultrastructure; D002358:Cartilage, Articular / Q000648:ultrastructure; D002417:Cattle; D003094:Collagen; D008854:Microscopy, Electron; D051381:Rats; D013552:Swine; D013710:Tendons / Q000648:ultrastructure
chemical_list: D003094:Collagen