Cleavage of amyloid‐β precursor protein ( APP ) at the Asp1 β‐secretase site of the amyloid‐β protein (Aβ) domain by β‐site Aβ precursor protein‐cleaving enzyme 1 ( BACE 1) is required for the generation of Aβ, a central component of neuritic plaques in the Alzheimer's disease ( AD ) brain. In th…