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Studies of oxidative and phosphorylative systems in mitochondria. I. A rapid and accurate determination of free nucleotides using high pressure liquid chromatography.

Numerous reports have been published on the oxidative and phosphorylative systems in mitochondria. However, the reaction products have been only indirectly estimated by measuring the increase or decrease of inorganic phosphate in the reaction systems. Studies of the oxidative and the phosphorylative capacities of mitochondria require an analytical method for determining adenine nucleotides that is rapid, sensitive, and capable of high resolution. This is necessary to directly detect ATP production or any mutual changes in ATP, ADP, and AMP that might be induced in the complicated enzymatic systems of mitochondria by changes in experimental conditions. To analyze nucleotides, the enzymatic, ion exchange