CAS Number: 131438-79-4 Molecular Weight: 4327.18 Salt Form: TFA Purity: >96% Sequence (3-letter): 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 Sequence (1-letter): DAEFRHDSGYEVHHQKLVFFAEDVGSNKGAIIGLMVGGVV-OH Storage: -20 ?C or below Solubility: ?water, 1mg/ml Beta amyloid (1-40), along with beta amyloid (1-42) (catalog 641-15) is one of the two main variants of the amyloid ? peptide involved in Alzheimers disease. Beta amyloid (1-40) is a peptide that is found in plaques in the brains of patients with Alzheimers disease and is shown to have both neurotrophic and neurotoxic effects in human and rat cell culture models.