BACE1, a member of the peptidase A1 protein family, is a type I integral membrane glycoprotein and aspartic protease that is found mainly in the Golgi. Responsible for the proteolytic processing of the amyloid precursor protein (APP). Cerebral deposition of amyloid beta peptide is an early and critical feature of Alzheimer's disease. BACE-1 is a member of the peptidase A1 protein family and is a type I integral membrane glycoprotein and aspartic protease that is found mainly in the Golgi. In brains of patients with Alzheimer's disease, BACE-1 is detected in reactive astrocytes, suggesting that astrocyte activation may play a role in the development of Alzheimer's disease.