title: Catalytic properties of the ATPase on submitochondrial particles after exchange of tightly bound nucleotides under different steady state conditions.
abstract: Energized submitochondrial particles were subjected to high or low [3H]ATP/[3H]ADP ratios, maintained during steady state by a pyruvate kinase or hexokinase regenerating system, respectively. Under both steady state conditions, about 1.4 mol [3H]nucleotide/mol ATPase was retained but considerably more [3H]ATP was retained with the high [3H]ATP/[3H]ADP ratio. The ATPase activity and the oxygen exchange of these differentially labeled SMP were the same, suggesting a lack of control function of non-catalytic tightly bound nucleotides.
mesh_terms: D000244:Adenosine Diphosphate / Q000378:metabolism*; D000251:Adenosine Triphosphatases / Q000378:metabolism*; D000255:Adenosine Triphosphate / Q000378:metabolism*; D000818:Animals; D001665:Binding Sites; D002384:Catalysis; D002417:Cattle; D055598:Chemical Phenomena; D002621:Chemistry; D008928:Mitochondria / Q000201:enzymology*; D010101:Oxygen Consumption
chemical_list: D000244:Adenosine Diphosphate; D000255:Adenosine Triphosphate; D000251:Adenosine Triphosphatases