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Biophysical Journal 9: 1256-1260 (1969)
© 1969 the Biophysical Society

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Nuclear Magnetic Resonance Studies of Sodium Ions in Isolated Frog Muscle and Liver

D. Martinez, A. A. Silvidi and R. M. Stokes

ABSTRACT

Nuclear magnetic resonance (NMR) was used to determine Na+ complexing in muscle and liver (at 23°C) from bullfrogs (Rana catesbeiana) and to study the influence of temperature on Na+ complexing in muscle from leopard frogs (Rana pipiens). The Na+ complexed in muscle and liver was found to be 36.6 ± 4.6% and 66.1 ± 3.5% respectively. A temperature decrease from +34°C to -2°C results in a 20% decrease in the mobility of the free Na+ in the fresh muscle. This 20% decrease in mobility results in about 50% of the free Na+ at 34°C being complexed at the lower temperature.




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W. McD. Armstrong and C. O. Lee
Sodium and Potassium Activities in Normal and "Sodium-Rich" Frog Skeletal Muscle
Science, January 29, 1971; 171(3969): 413 - 415.
[Abstract] [PDF]


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Copyright © 1969 by the Biophysical Society.