For example, Alzheimer's disease‐linked protease β‐site APP‐cleaving enzyme (BACE1) (Vassar et al, 1999; Yan et al, 1999), which has fundamental functions in the brain, is highly expressed in neurons, but not in astrocytes, microglia, or oligodendrocytes (Voytyuk et al, 2018). The gene discussed is BACE1; the disease is Alzheimer disease.