LAMA block the bronchoconstrinction effect of acetylcholine on M3 muscarinic receptors expressed in airway smooth muscle; they have prolonged binding to M3 muscarinic receptors with faster dissociation from M2 muscarinic receptors (Global initiative for chronic obstructive Lung disease [GOLD], 2018). The gene discussed is CHRM3; the disease is chronic obstructive pulmonary disease.