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Amyloid beta (Aǂ or Abeta) is a peptide of 36-43 amino acids that is processed from the Amyloid precursor protein. While best known as a component of amyloid plaques in association with Alzheimer's disease, evidence has been found that Aǂ is a highly multifunctional peptide with significant non-pathological activity1. Aǂ is the main component of deposits found in the brains of patients with Alzheimer's disease. Brain Aǂ is elevated in patients with sporadic Alzheimeros disease. Aǂ is the main constituent of brain parenchymal and vascular amyloid, it contributes to cerebrovascular lesions and is neurotoxic2.

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