The
GABAA-rho receptor (previously known as the
GABAC receptor) is a subclass of
GABAA receptors composed entirely of rho (ρ) subunits. GABA
A receptors including those of the ρ-subclass are
ligand-gated ion channels responsible for mediating the effects of gamma-amino butyric acid (
GABA), the major inhibitory
neurotransmitter in the brain. The GABA
A-ρ
receptor, like other
GABAA receptors, is expressed in many areas of the brain, but in contrast to other GABA
A receptors, the GABA
A-ρ receptor has especially high expression in the
retina.