title: Collagen from frozen fractured glycerinated beef heart.
mesh_terms: D000818:Animals; D002417:Cattle / Q000378:metabolism*; D003094:Collagen; D005613:Freeze Etching; D005990:Glycerol; D008854:Microscopy, Electron; D009206:Myocardium / Q000032:analysis*; D010210:Papillary Muscles / Q000032:analysis
chemical_list: D003094:Collagen; D005990:Glycerol