LEGEND MAX™ Human Tau (x-421) ELISA Kit

Pricing & Availability
Regulatory Status
RUO
Other Names
Tau-C, C-MAPT, Tau (1-421)
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LEGENDMAX_Human-Tau-x-421_ELISAKit_072925
  • LEGENDMAX_Human-Tau-x-421_ELISAKit_072925
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436017 1 Pre-coated Plate NOK4827
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Description

Tau is a 441-amino acid protein that binds along microtubules in order to stabilize them. Phosphorylation of tau reduces its affinity for microtubules, leading to microtubule destabilization. Hyperphosphorylated tau can assemble into higher order structures, including oligomers and neurofibrillary tangles (NFT). NFTs are a hallmark of several neurodegenerative diseases, including Alzheimer's disease (AD), Parkinson's disease (PD), and frontotemporal dementia. 

In addition to phosphorylation, proteolytic cleavage of tau is an important post-translational modification. For example, caspase-3-mediated cleavage of tau at Asp421 is an early step in NFT formation and has been linked to an increase in neurotoxicity in AD patients. Furthermore, the number of NFTs composed of tau (x-421) is positively correlated with AD progression. Tau cleavage products have also been found in PD patients, thus demonstrating that truncated forms of tau could be a biomarker for multiple neurodegenerative diseases.

The BioLegend LEGEND MAX™ Human Tau (x-421) ELISA Kit is a Sandwich Enzyme-Linked Immunosorbent Assay (ELISA) with a 96-well strip plate that is pre-coated with a monoclonal mouse anti-human tau (x-421) capture antibody. The detection antibody is a biotinylated monoclonal mouse anti-human tau antibody. This kit is specifically designed for the accurate quantitation of human tau (x-421) in human cell/tissue lysates. This kit is analytically validated with ready-to-use reagents.

Product Details
Technical Data Sheet (pdf)

Kit Details

Kit Contents
  • Tau (x-421) Pre-coated 96-well Strip Microplate
  • Tau (x-421) Detection Antibody
  • Tau (x-421) Lyophilized Standard
  • Avidin HRP
  • Assay Buffer B
  • Substrate Solution F
  • Stop Solution
  • 20X Wash Buffer
  • Plate Sealers
Materials Not Included
  • Microplate reader able to measure absorbance at 450 nm
  • Microplate shaker
  • Adjustable pipettes to measure volumes ranging from 1 µL to 1000 µL
  • Deionized water
  • Wash bottle or automated microplate washer
  • Log-log graph paper or software for data analysis
  • Tubes to prepare standard dilutions
  • Timer
  • Polypropylene vials

Product Details

Verified Reactivity
Human
Application

ELISA

Sensitivity
46.6 ± 11.2 pg/mL
Standard Range
62.5 – 4000 pg/mL

Related FAQs

In your LEGEND MAX™ ELISA Kits, there is a step that calls for washing the plates before adding sample. What is the purpose of this step?

We typically use a stabilizer for pre-coated plates. The additional washing step is designed to remove these components before you start the assay. If you do not perform the washing, the effect on assay performance is negligible.

I have multiple LEGEND MAX™ ELISA kits that I want to run simultaneously. Can I use the same wash buffer for all the kits?

The wash buffer provided in all our LEGEND MAX™ kits is the same and the part numbers on the wash buffer bottles in these kits should be identical. For ELISA MAX™ Deluxe and ELISA MAX™ Standard Sets, we provide a recipe for the wash buffer on each kit’s technical data sheet. This recipe is the same for all ELISA MAX™ sets.

For some of your ELISA kits, why do my serum samples require dilution with assay buffer?

In some cases, dilution with assay buffer is required to minimize the matrix difference between the samples and the standards to achieve better accuracy.

Go To Top Version: 1    Revision Date: 07.29.2025

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 www.biolegend.com/terms) ("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.

 

BioLegend, the BioLegend logo, and all other trademarks are property of BioLegend, Inc. or their respective owners, and all rights are reserved.

 

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