title: Calcium requirements for cardiac myofibrillar activation.
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism; D000818:Animals; D001665:Binding Sites; D002118:Calcium / Q000378:metabolism / Q000494:pharmacology / Q000502:physiology*; D004285:Dogs; D006321:Heart / Q000502:physiology*; D006352:Heart Ventricles / Q000187:drug effects; D066298:In Vitro Techniques; D009124:Muscle Proteins / Q000032:analysis; D009206:Myocardium / Q000032:analysis; D009210:Myofibrils / Q000201:enzymology / Q000502:physiology*; D013054:Spectrophotometry, Atomic; D014159:Transducers; D016276:Ventricular Function
chemical_list: D009124:Muscle Proteins; D000251:Adenosine Triphosphatases; D002118:Calcium