title: [Presence of 2 calcium channel fractions in the frog myocardium].
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology; D000200:Action Potentials / Q000187:drug effects; D000818:Animals; D002118:Calcium / Q000378:metabolism*; D004837:Epinephrine / Q000494:pharmacology; D005711:Gallopamil / Q000494:pharmacology; D066298:In Vitro Techniques; D007473:Ion Channels / Q000187:drug effects*; D008345:Manganese / Q000494:pharmacology; D009200:Myocardial Contraction / Q000187:drug effects; D009206:Myocardium / Q000378:metabolism*; D009543:Nifedipine / Q000494:pharmacology; D011898:Ranidae
chemical_list: D007473:Ion Channels; D005711:Gallopamil; D008345:Manganese; D009543:Nifedipine; D000109:Acetylcholine; D002118:Calcium; D004837:Epinephrine
vernacular_title: O nalichii dvukh fraktsiĭ kal'tsievykh kanalov v miokarde liagushki.