CHRM2 (Cholinergic Receptor Muscarinic 2): CHRM2 is a member of the muscarinic cholinergic receptor family, which plays a crucial role in mediating the effects of acetylcholine in both the central and peripheral nervous systems. This G protein-coupled receptor is involved in important physiological processes such as heart rate regulation, smooth muscle contraction, and cognitive functions. CHRM2 significantly influences cardiovascular control by contributing to the reduction of heart rate and decreasing cardiac contractility. In the brain, it is linked to memory, learning, and may be implicated in certain neurological disorders.