. "Protein which forms or is a component of a ligand-gated channel. Ligand-gated channels are transmembrane ion channels whose permeability is increased by the binding of a specific ligand, such as neurotransmitters, ionositol triphosphates, and cyclic nucleotides." . . . "Ligand-gated ion channel" . "Ligand-gated channel" . "LGIC" . .