Background：Glycine receptors are ligand-gated chloride channels. GLRB does not form ligand-gated ion channels by itself, but is part of heteromeric ligand-gated chloride channels. Channel opening is triggered by extracellular glycine(PubMed:8717357, PubMed:15302677, PubMed:16144831, PubMed:22715885, PubMed:25445488, PubMed:11929858, PubMed:23238346). Heteropentameric channels composed of GLRB and GLRA1 are activated by lower glycine levels than homopentameric GLRA1(PubMed:8717357). Plays an important role in the down-regulation of neuronal excitability(PubMed:11929858, PubMed:23238346). Contributes to the generation of inhibitory postsynaptic currents(PubMed:25445488).
