Functional consequences of the loss of high affinity agonist binding to gamma-aminobutyric acid type A receptors. Implications for receptor desensitization.

Abstract excerpt

We reported previously that tyrosine 62 of the beta2 subunit of the gamma-aminobutyric acid, type A (GABA(A)) receptor is an important determinant of high affinity agonist binding and that recombinant alpha1beta2gamma2(L) receptors carrying the Y62S mutation lack measurable high affinity sites for [3H]muscimol. We have now examined the effects of disrupting these sites on the macroscopic desensitization...

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