[Correlation between heat production of a muscle tetanized at 20 degrees and phosphorylcreatine and nucleotide consumption].
(1971)
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- Abstract
- Sartorius muscles of frogs were tetanized 0.5 to 12 s at 20°C, rapidly frozen and analyzed for their content in phosphocreatine (PC), ATP, ADP, IMP. Heat production were measured in other muscles placed in the same conditions. Hydrolysis of PC and heat production decreases exponentially during the tetani, but at different rates. The calculated enthalpy change of PC breakdown (- ΔH) increases from 12.2 kcal/mole at beginning to 42 kcal/mole at the end of the tetanus. The excess of heat production may go up by +45% and is not suppressed by oxygen lack or iodoacetate. The source of this large excess heat is unknown
Citations
Canfield, P., Lebacq, J., & Maréchal, G. (1971). [Correlation between heat production of a muscle tetanized at 20 degrees and phosphorylcreatine and nucleotide consumption]. Journal de physiologie, 63(6), 181A. (Original work published 1971)