The GABA-B receptor functions as a neuronal inhibitor, distinct from its counterpart, the GABA-A receptor. It operates as a G-protein-coupled receptor (GPCR), meaning that upon activation, it initiates a cellular signaling cascade rather than acting as a direct ion channel. When a signal molecule binds, the receptor releases its associated G-protein. The G-beta-gamma subunit then travels through the cell to activate a specific type of potassium channel called GIRK (G-protein-gated inwardly recti

Bone matrix