GLRB (Glycine Receptor Beta Subunit): GLRB is a gene that encodes a component of the glycine receptor, a chloride channel essential for inhibitory neurotransmission in the spinal cord and brainstem. This receptor is important for regulating motor and sensory functions, and mutations in GLRB can cause neurological conditions such as hyperekplexia, marked by an exaggerated startle reflex.