BCHE and early-onset autosomal dominant Alzheimer disease: Disruption of AChE hasbeen linked with pathologies such as Alzheimer’s disease, Parkinson’sdisease, Myasthenia gravis, depression, organophosphorus poisoning,and cancer.2−4 Butyrylcholinesterase is a less specific ChE enzyme,found mainly in the plasma, and its disruption has been linked withsudden infant death syndrome and Alzheimer’s disease, potentiallyserving as a biomarker.5