Nuclear magnetic resonance studies of sodium ions in isolated frog muscle and liver.
Nuclear magnetic resonance (NMR) was used to determine Na(+) complexing in muscle and liver (at 23 degrees 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 degrees C to -2 degrees 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 degrees C being complexed at the lower temperature.
D000818:Animals; D001001:Anura; D003080:Cold Temperature; D008099:Liver / Q000378:metabolism*; D009682:Magnetic Resonance Spectroscopy; D009132:Muscles / Q000378:metabolism*; D012964:Sodium / Q000378:metabolism*
D012964:Sodium
Biochim Biophys Acta. 1967 Feb 1;135(1):170-3
4291675
J Gen Physiol. 1967 May;50(5):1353-75
6033590
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5653716
J Physiol. 1961 Apr;156:314-35
13714453