title: Effect of methylxanthines and elevated external potassium on high energy phosphate content in frog skeletal muscle.
mesh_terms: D000818:Animals; D001001:Anura; D002110:Caffeine / Q000494:pharmacology; D002118:Calcium / Q000378:metabolism; D004734:Energy Metabolism / Q000187:drug effects*; D066298:In Vitro Techniques; D009132:Muscles / Q000187:drug effects* / Q000378:metabolism; D010710:Phosphates / Q000378:metabolism*; D011188:Potassium / Q000378:metabolism / Q000494:pharmacology*; D011894:Rana pipiens; D012964:Sodium / Q000378:metabolism; D013806:Theophylline / Q000494:pharmacology; D013997:Time Factors; D014970:Xanthines / Q000494:pharmacology*
chemical_list: D010710:Phosphates; D014970:Xanthines; D002110:Caffeine; D012964:Sodium; D013806:Theophylline; D011188:Potassium; D002118:Calcium