Purity ~80%. Humanin (HN) encodes a polypeptide that appears to protect neurons from both cytotoxic and apoptotic cell death in Alzheimer's disease. Analogues of the HN peptide have been shown to spare memory in animal models of Alzheimer's, suggesting its potentially important therapeutic role. It is found in highest levels in testis, colon, and AD-affected brain tissues. Control Peptide for H7953-29 Sequence (linear): LLLLTSEIDLPVKRRA