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Metabotropic glutamate (mGlu) receptors are a family of G-protein-coupled receptors that play central roles as modulators of both glutamatergic and other major neurotransmitter systems in CNS. Using molecular modeling, site-directed mutagenesis, [(3)H]LY354740 binding, [(35)S]GTPgammaS binding, and activation of GIRK current, we have been able to identify(More)
The binding properties of [(3)H]-LY354740 were characterized on rat metabotropic glutamate receptors mGlu2 and mGlu3 expressed in Chinese hamster ovary (CHO) cells using Semliki Forest virus vectors. The saturation isotherm gave K(D) values of 20+/-5 and 53+/-8 nM and B(max) values of 474+/-161 and 667+/-89 fmol/mg protein for mGlu2 and mGlu3 receptors,(More)
Natural polyamines have been proposed to induce histamine release from mast cells through a direct interaction with G proteins. Alternatively, the polyamine binding site of ionotropic N-methyl-D-aspartate (NMDA) receptors has been suggested as a target for spermine on mast cells. We reexamined both hypotheses. Incubation of rat peritoneal mast cells with(More)
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