GABAB Receptor
GABAB receptors (GABABR) are metabotropic transmembrane receptors for gamma-aminobutyric acid (GABA) that are linked via G-proteins to potassium channels. The changing potassium concentrations hyperpolarize the cell at the end of an action potential. The reversal potential the GABAB-mediated IPSP is -100 mV, which is much more hyperpolarized than the GABAA IPSP. GABAB receptors are found in the central and peripheral autonomic nervous system.
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