This is amino acids 5 to 40 fragment of the beta-amyloid peptide. This amino-truncated amyloid peptide produced from caspase-cleaved amyloid precursor protein is deposited in Alzheimer’s disease brain. Cleavage between Phe4 and Arg5 is not mediated by BACE1.
H - Arg - His - Asp - Ser - Gly - Tyr - Glu - Val - His - His - Gln - Lys - Leu - Val - Phe - Phe - Ala - Glu - Asp - Val - Gly - Ser - Asn - Lys - Gly - Ala - Ile - Ile - Gly - Leu - Met - Val - Gly - Gly - Val - Val - OH