GLRB (Glycine receptor beta) is a neurotransmitter-gated ion channel concentrated within the spinal cord and brainstem. Expression is also observed in several upper brain regions including the cortex, cerebellum, hippocampus and amygdala. Binding of glycine to GLRB increases the chloride conductance and thus produces hyperpolarization (inhibition of neuronal firing), controlling spinal reflexes and locomotor behavior.