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Am J Physiol Regul Integr Comp Physiol 232: R158-R163, 1977;
0363-6119/77 $5.00
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AJP - Regulatory, Integrative and Comparative Physiology, Vol 232, Issue 5 158-R163, Copyright © 1977 by American Physiological Society

ARTICLES

Distribution of adenine nucleotides in the perfused rat heart

M. C. Kohn, M. J. Achs and D. Garfinkel

A computer technique for determination of the distribution of adenine nucleotides among compartmented, protonated, and metal-chelated species has been developed for the perfused rat heart. This procedure requires knowledge of tissue levels of creatine, creatine phosphate, ATP, ADP, and AMP and the glycolytic and respiration rates. The method is applicable to any physiological state of the organ and has been applied to transient behavior in aerobic, anoxic, and ischemic hearts. The results suggest that ADP uptake and ATP export by mitochondria are normally linked and equal in rate during aerobic metabolism or short-term anoxia but become separate and unequal during ischemia, so that mitochondrial adenine nucleotides, primarily AMP, accumulate.




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