Tau (Total) Human ELISA Kit

Catalog number:  KHB0041

 Related applications: Protein Assays and Analysis

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The Human Tau (Total) ELISA research-use-only kit is designed to detect and quantify the level of human Tau protein (phosphorylated and nonphosphorylated) in cell culture supernatants and cerebrospinal fluid (CSF) using 96-well plates and a microplate reader. The assay will recognize both natural and recombinant human tau.

Performance characteristics
• Sensitivity: <12 pg/mL
• Standard curve range: 31.2–2,000 pg/mL
• Sample types: cell culture supernatants, cerebrospinal fluid (CSF)
• Species cross-reactivity: human
• Sample volume: 50 μL
• Total assay incubation time: 4 hrs

Principle of the method
The Human Tau (Total) kit is a solid phase sandwich enzyme-linked immunosorbent assay (ELISA). A monoclonal antibody specific for human Tau has been coated onto the wells of the microtiter strips provided. Samples, including standards of known human Tau content, control specimens, and unknowns, are pipetted into these wells. During the first incubation, the human Tau antigen binds to the immobilized (capture) antibody on one site. After washing, a rabbit polyclonal antibody specific for human Tau is added.

During the second incubation, this antibody binds to the immobilized human Tau captured during the first incubation. After removal of excess second antibody, a horseradish peroxidase-labeled anti-rabbit antibody is added. This binds to the rabbit polyclonal antibody to complete the four-member sandwich. After a third incubation and washing to remove all the excess anti-rabbit-HRP, a substrate solution is added, which is acted upon by the bound enzyme to produce color. The intensity of this colored product is directly proportional to the concentration of human Tau present in the original specimen.

Background information
Tau is a microtubule-associated protein found predominantly in neuronal axons of the vertebrate brain. Human tau exists as six different isoforms that result from alternative splicing of the single transcript derived from a gene located on chromosome 17. The molecular weight of the tau isoforms ranges from 48 kDa to 68 kDa. Tau protein is highly soluble and normally attached to axonal microtubules. Tau stabilizes the microtubules and makes them rigid. Tau interacts with actin in the cytoskeleton and neuronal outgrowth, anchors enzymes such as protein kinases and phosphatases, and regulates intracellular vesicle transport. Tau is phosphorylated by numerous serine/threonine kinases, including GSK-3β, PKA, PKC, CDK5, MARK, JNK, p38MAPK and casein kinase II. Tau phosphorylation regulates both normal and pathological functions of this protein.

Detect low-expressing proteins and use less sample
ELISA kits designed to measure intracellular signaling targets are typically 2–10 times more sensitive than western blotting. The improved sensitivity enables you to detect low-expressing proteins that otherwise may not be distinguishable from background. In addition, the amount of sample needed to run the assay is less than what is needed for western blots.

Each Human Tau (Total) ELISA kit is validated for sensitivity, specificity, precision, and lot-to-lot consistency. See protocol insert for more information on validation.

Related links
Learn more about ELISA kits
Learn more about other immunoassays
For Research Use Only. Not for use in diagnostic procedures.


Assay Incubation Time: 4 hr
Assay Range: 31-2000 pg/mL
Assay Sensitivity: <12 pg/mL
Detection Method: Colorimetric
For Use With (Equipment): Microplate Reader
Former Identifiers: Novex
Gene ID: 4137
Gene Name: microtubule associated protein tau
Gene Symbol: MAPT
Immunoassay Kit Format: Coated ELISA Kit
Label or Dye: HRP (Horseradish Peroxidase)
Product Size: 96 tests
Protein Aliases: Neurofibrillary tangle protein, Paired helical filament-tau, PHF-tau
Protein Name: Microtubule-associated protein tau
Sample Type (Specific): Cell Culture Supernatants, Cerebrospinal Fluid
Sample Volume: 50 µL
Shipping Condition: Wet Ice
Target (Kit Named): Tau
Target Species (Named): Human
Target Species (Validated): Human
Target Sub-Specificity: Total
UniProt ID: P10636

Contents & storage

Pre-coated plate(s), standard or calibrator, detector antibody, HRP conjugate, diluents, wash buffer, substrate(s), and stop solution. Store kit at 2-8°C. See product manual for detailed contents and storage conditions for maximum stability.


Manuals & protocols

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