Recombinant Human Tau-383 (0N4R) (Previously Covance catalog# PTN-5277)

Pricing & Availability
Regulatory Status
Other Names
Microtubule-Associated Protein Tau, Phf-Tau, Paired Helical Filament-Tau, Neurofibrillary Tangle Protein, Microtubule-Associated Protein Tau, Isoform 4, G Protein Beta1/Gamma2 Subunit-Interacting Factor 1
Covance Catalog# PTN-5277
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Product Citations
Western blot showing reactivity of 0N4R TAU protein using TAU5 (Cat. No. 806403) antibody. Lane1: Molecular weight marker; Lane 2: 50 ng 0N4R TAU protein.
  • recom_Human_Tau-383_WB_030515.jpg
    Western blot showing reactivity of 0N4R TAU protein using TAU5 (Cat. No. 806403) antibody. Lane1: Molecular weight marker; Lane 2: 50 ng 0N4R TAU protein.
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843001 25 µg 178€
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Human Tau-383 full-length recombinant protein (a.a. 1 - 383) with 8X His-tag at the N-terminus. The protein was expressed in E. coli.

Product Details
Technical Data Sheet (pdf)

Product Details

Verified Reactivity
>90% by SDS-PAGE
50 mM Tris-HCl, 300 mM NaCl, 10% Glycerol, 0.5 mM TCEP, pH 8.
0.1 mg/mL
Storage & Handling
Unopened vial can be stored between 2°C and 8°C for one month, at -20°C for six months, or at -70°C for one year. For maximum results, quick spin vial prior to opening. The protein can be aliquoted and stored at -20°C to -70°C. Avoid repeated freeze/thaw cycles.

WB - Quality tested

Recommended Usage

The optimal working dilution should be determined for each specific assay condition.
WB: Recommended load amount of 0.2-0.5 μg/lane

Application Notes

This protein has utility in immunoblotting (WB).

Uni Prot ID: P10636-6

WB Expected MW: 53 kD
Tau-383 MW: 40.0 kD
8X His-tag Tau-383 MW: 42.2 kD

WB Positive Control: TAU 5 antibody (Catalog No. SIG-39413)

Antigen Details

Biology Area
Cell Biology, Neurodegeneration, Neuroscience, Protein Misfolding and Aggregation
Molecular Family
Gene ID
4137 View all products for this Gene ID
View information about Tau-383 on

Related FAQs

Why choose BioLegend recombinant proteins?

     • Each lot of product is quality-tested for bioactivity as indicated on the data sheet.
     • Greater than 95% Purity or higher, tested on every lot of product.
     • 100% Satisfaction Guarantee for quality performance, stability, and consistency.
     • Ready-to-use liquid format saves time and reduces challenges associated with reconstitution.
     • Bulk and customization available. Contact us.
     • Learn more about our Recombinant Proteins.

How does the activity of your recombinant proteins compare to competitors?

We quality control each and every lot of recombinant protein. Not only do we check its bioactivity, but we also compare it against other commercially available recombinant proteins. We make sure each recombinant protein’s activity is at least as good as or better than the competition’s. In order to provide you with the best possible product, we ensure that our testing process is rigorous and thorough. If you’re curious and eager to make the switch to BioLegend recombinants, contact your sales representative today!

What is the specific activity or ED50 of my recombinant protein?

The specific activity range of the protein is indicated on the product datasheets. Because the exact activity values on a per unit basis can largely fluctuate depending on a number of factors, including the nature of the assay, cell density, age of cells/passage number, culture media used, and end user technique, the specific activity is best defined as a range and we guarantee the specific activity of all our lots will be within the range indicated on the datasheet. Please note this only applies to recombinants labeled for use in bioassays. ELISA standard recombinant proteins are not recommended for bioassay usage as they are not tested for these applications.

Have your recombinants been tested for stability?

Our testing shows that the recombinant proteins are able to withstand room temperature for a week without losing activity. In addition the recombinant proteins were also found to withstand four cycles of freeze and thaw without losing activity.

Does specific activity of a recombinant protein vary between lots?

Specific activity will vary for each lot and for the type of experiment that is done to validate it, but all passed lots will have activity within the established ED50 range for the product and we guarantee that our products will have lot-to-lot consistency. Please conduct an experiment-specific validation to find the optimal ED50 for your system.

How do you convert activity as an ED50 in ng/ml to a specific activity in Units/mg?

Use formula Specific activity (Units/mg) = 10^6/ ED50 (ng/mL)

Go To Top Version: 4    Revision Date: 04/05/2021

For Research Use Only. Not for diagnostic or therapeutic use.


This product is supplied subject to the terms and conditions, including the limited license, located at ("Terms") and may be used only as provided in the Terms. Without limiting the foregoing, BioLegend products may not be used for any Commercial Purpose as defined in the Terms, resold in any form, used in manufacturing, or reverse engineered, sequenced, or otherwise studied or used to learn its design or composition without express written approval of BioLegend. Regardless of the information given in this document, user is solely responsible for determining any license requirements necessary for user’s intended use and assumes all risk and liability arising from use of the product. BioLegend is not responsible for patent infringement or any other risks or liabilities whatsoever resulting from the use of its products.


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