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  • Title: Contribution of proton transporter to acid-induced receptor potential in frog taste cells.
    Author: Okada Y, Miyamoto T, Sato T.
    Journal: Comp Biochem Physiol Comp Physiol; 1993 Aug; 105(4):725-8. PubMed ID: 7689435.
    Abstract:
    1. The generative mechanism of the acid-induced receptor potential in frog taste cells was re-examined with micro-electrodes. 2. The amplitude of receptor potentials in a taste cell induced by 1 mM acetic acid increased as the concentration of Ca2+, Sr2+ and Ba2+ on the tongue surface was increased. 3. The amplitude of the acid-induced receptor potential was inhibited by about 40% by a proton pump blocker DCCD (N,N'-dicyclohexylcarbodiimide) added to superficial normal saline. 4. It is concluded that most of the acid-induced response in a frog taste cell was generated by current carried through proton-gated Ca2+ channel of the apical receptive membrane. The remaining part of the acid response was generated by current carried through a DCCD-sensitive proton transporter of the receptive membrane.
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