PMID: 6972437Apr 1, 1981Paper

Selective enhancement and suppression of frog gustatory responses to amino acids

The Journal of General Physiology
K YoshiiK Kurihara

Abstract

Properties of the receptor sites for L-amino acids in taste cells of the bullfrog (Rana catesbeiana) were examined by measuring the neural activities of the glossopharyngeal nerve under various conditions. (a) The frogs responded to 12 amino acids, but the responses to the amino acids varied with individual frogs under natural conditions. The frog tongues, however, exhibited similar responses after an alkaline treatment that removes Ca2+ from the tissue. The variation in the responses under natural conditions was apparently due to the variation in the amount of Ca2+ bound to the receptor membrane. (b) The responses to hydrophilic L-amino acids (glycine, L-alanine, L-serine, L-threonine, L-cysteine, and L-proline) were of a tonic type, but those to hydrophobic L-amino acids (L-valine, L-leucine, L-isoleucine, L-methionine, L-phenylalanine, and L-tyrptophan) were usually composed of both phasic and tonic components. (c) The properties of the tonic component were quite different from those of the phasic component: the tonic component was largely enhanced by the alkaline treatment and suppressed by the acidic treatment that increases binding of Ca2+ to the tissue. Also, the tonic component was suppressed by the presence of low conc...Continue Reading

References

Jan 1, 1990·Comparative Biochemistry and Physiology. A, Comparative Physiology·O Sata, T Sato
Feb 1, 1972·Comparative Biochemistry and Physiology. A, Comparative Physiology·M Ozeki, M Sato
Mar 1, 1962·The Journal of General Physiology·B P HALPERNM R KARE

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Citations

Jan 1, 1987·The Journal of Membrane Biology·P Avenet, B Lindemann
Mar 17, 2012·Pflügers Archiv : European journal of physiology·Namie BeppuKiyonori Yoshii
Feb 1, 1988·Pharmacology, Biochemistry, and Behavior·S A SimonS S Schiffman
Jan 1, 1984·Comparative Biochemistry and Physiology. A, Comparative Physiology·S Nagahama, K Kurihara
Jan 1, 1985·Comparative Biochemistry and Physiology. A, Comparative Physiology·K D Gordon, J Caprio
Jan 1, 1986·Comparative Biochemistry and Physiology. A, Comparative Physiology·K KuriharaM Kashiwayanagi
Jul 1, 1995·Progress in Neurobiology·F Osculati, A Sbarbati
May 12, 1998·Applied Human Science : Journal of Physiological Anthropology·B C Min, K Sakamoto
Jul 1, 1985·The International Journal of Neuroscience·J A Jesberger, J S Richardson

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