Purity ~90% by HPLC and MS analysis. Major constituent of plaques and tangles that occur in Alzheimer's disease (AD) patients. Sequence (linear): H2N-Asp-Ala-Glu-Phe-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 Amino Acid Analysis: Confirms expected sequence Peptide Content: ~85.1 ± 4% Solubility: H2O, DMSO, HFIP (1,1,1,3,3,3-hexafluoro-2-propanol).