title: Changes in adenosine and glycogen phosphorylase activity during the cardiac cycle.
mesh_terms: D000241:Adenosine / Q000378:metabolism*; D000818:Animals; D003326:Coronary Circulation; D003971:Diastole; D006168:Guinea Pigs; D066298:In Vitro Techniques; D008297:Male; D009200:Myocardial Contraction; D009206:Myocardium / Q000201:enzymology / Q000378:metabolism*; D010477:Perfusion; D006005:Phosphorylases / Q000378:metabolism*; D012039:Regional Blood Flow; D013599:Systole
chemical_list: D006005:Phosphorylases; D000241:Adenosine