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You are here:Home » Molecular Biology » MB-Microtubule-associated Protein » Tau [pS199/pS202] Positive and Negative Control Peptides (Tau Protein, Microtubule-associated Protein, MAP)

Tau [pS199/pS202] Positive and Negative Control Peptides (Tau Protein,
Microtubule-associated Protein, MAP)


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Tau proteins are important in the assembly of microtubules. In normal brain, tau is localized within the axons of the neurons, but in some neuropathological lesions, it accumulates within the body of the neuron. Tau proteins are thought to be abnormally phosphorylated in certain disease states. Tau has been immunohistochemically localized to neurofibrillary tangles of Alzheimer’s disease (AD) brains. Tau proteins promote the assembly of tubulin monomers into microtubules and stabilize microtubules. Alternate splicing of tau mRNA, glycosylation, and differential phosphorylation contribute to the heterogeneity of tau.
Catalog #T1040-09
Kit ComponentsT1040-09A: Positive Control GYSS*PGS*PGTPG (*Phosphorylated)
Formula: C45H68N12O24P2
MW: 1223.10D
T1040-09B Negative Control GYSSPGSPGTPG
Formula: C45H66N12O18
MW: 1063.10D
ApplicationsSuitable for use as a control in Western Blot. Other applications not tested.
Recommended DilutionOptimal dilutions to be determined by the researcher.
ReconstitutionReconstitute each vial with 100ul sterile, ddH2O. The peptides may be gently vortexed or triturated at RT to ensure complete solubilization. If the peptides are found to be slow to dissolve, the pH of the solutions may be neutralized by addition of small volumes (1-2ul) of 1.0N ammonium hydroxide; alternatively, the peptides may be solubilized by addition of small volumes of organic solvent, such as ethanol or DMSO.
Storage and StabilityLyophilized powder may be stored at 4°C for short-term only. Stable for 12 months at -20°C. Reconstitute (see reconstitution instructions for peptides) and store at -20°C. For maximum recovery of product, centrifuge the original vial prior to removing the cap. Further dilutions can be made in assay buffer.
Molecular Weight1223/1063D
Purity~90% by HPLC
FormSupplied as a lyophilized powder (Trifluoroacetate salt).
Important NoteThis product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.

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