GNB5 (G Protein Subunit Beta 5): GNB5 is a protein component of heterotrimeric G proteins, which mediate cellular responses to external signals through signal transduction pathways. It plays vital roles in regulating heart rate, vision, and neurotransmission, functioning in both the central and peripheral nervous systems. Variants in GNB5 have been linked to arrhythmias and neurodevelopmental disorders, underscoring its significance in studies of signal transduction and related diseases.