Biophysical Journal 12: 404-413 (1972)
© 1972 the Biophysical Society

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¹⁷O Nuclear Magnetic Resonance Spectrum of H₂¹⁷O in Frog Striated Muscle

ABSTRACT

Whole striated muscles from the frog Rana esculenta were bathed in Ringer's solution enriched with H₂¹⁷O; the muscle water was subsequently collected by vacuum distillation. The integrated intensity of the nuclear magnetic resonance (NMR) signal of ¹⁷O in the muscle was measured to be approximately of the signal observed in the distilled water. The phenomenon may arise either from immobilization of a population of the water molecules which may be a very small fraction or as much as of the total, or may reflect tumbling of of the water molecules in a compartment containing an anisotropic medium. Such an effect was demonstrated for H₂¹⁷O using the model system of sodium linoleate in water.

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