AChE and BChE, as cholinesterase (ChE), inactivate acetylcholine through hydrolysis to maintain the homeostasis of the cholinergic system, whose disturbance would cause impairment in motivation, arousal, and attention [10,11,12], with arousal being discussed to be a factor in the pathogenesis of SIDS [29]. The gene discussed is ACHE; the disease is sudden infant death syndrome.