title: Absence of direct actions of norepinephrine on cardiac myosin and cardiac actomyosin.
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism*; D000818:Animals; D002118:Calcium / Q000494:pharmacology; D004285:Dogs; D006321:Heart / Q000187:drug effects*; D066298:In Vitro Techniques; D008274:Magnesium / Q000494:pharmacology; D009119:Muscle Contraction / Q000502:physiology; D009124:Muscle Proteins / Q000378:metabolism*; D009206:Myocardium / Q000032:analysis / Q000378:metabolism*; D009638:Norepinephrine / Q000494:pharmacology*
chemical_list: D009124:Muscle Proteins; D000251:Adenosine Triphosphatases; D008274:Magnesium; D002118:Calcium; D009638:Norepinephrine