Synthetic phosphopeptide derived from a region of human tau that contains serine 409. Species Sequence Homology: Mouse and rat - 100%
Tau is a neuronal microtubule-associated protein found predominantly on axons that functions to promote tubulin polymerization and stabilize microtubules. Tau, in its hyperphosphorylated form, is the major component of paired helical filaments (PHF), the building block of neurofibrillary lesions in Alzheimers disease (AD) brain. Hyperphosphorylated tau is also found in neurofibrillary lesions in a range of other central nervous system disorders. Hyperphosphorylation impairs the microtubule binding function of tau, resulting in the destabilization of microtubules in AD brains, ultimately leading to the degeneration of the affected neurons. Numerous serine/threonine kinases including GSK-3b, protein kinase A (PKA), cyclin-dependent kinase 5 (cdk5) and casein kinase II (CK2), phosphorylate tau. Serine 409 is phosphorylated by PKA in vitro and has been shown to be phosphorylated in AD brain. Applications: Suitable for use in ELISA and Western Blot. Other applications not tested. Recommended Dilutions: Western Blot: 1:1000 Optimal dilutions to be determined by the researcher. Positive Control: Recombinant human Tau left untreated, or treated with PKA. Storage and Stability: May be stored at 4C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20C. Aliquots are stable for 12 months after receipt. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
Purified by immunoaffinity chromatography. Antibody has been negatively preadsorbed using a non-phosphopeptide corresponding to the site of phosphorylation to remove antibody that is reactive with non-phosphorylated Tau.
Form:
Supplied as a liquid in PBS (without Mg2+ and Ca2+), pH 7.3, 1mg/ml BSA (IgG, protease free), 0.05% sodium azide, 50% glycerol.
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