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Rat Tau(Tau Proteins) ELISA Kit
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ELK10040
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48 T $412.00
96 T $588.00
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Overview

Product name: Rat Tau(Tau Proteins) ELISA Kit
Reactivity: Rat
Alternative Names: Mapt ;Mtapt;Tau;Microtubule-associated protein tau;Microtubule-associated protein tau;Paired helical filament-tau (PHF-tau)
Assay Type: Sandwich
Sensitivity: 15.6 pg/mL
Standard: 4000 pg/mL
Detection Range: 62.5-4000 pg/mL
Sample type: 62.5-4000 pg/mL
Assay length: 3.5h
Research Area: Signal Transduction
Uniprot ID: P19332
Test principle: The test principle applied in this kit is Sandwich enzyme immunoassay. The microtiter plate provided in this kit has been pre-coated with an antibody specific to Rat Tau. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Rat Tau. Next, Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. After TMB substrate solution is added, only those wells that contain Rat Tau, biotin-conjugated antibody and enzyme-conjugated Avidin will exhibit a change in color. The enzyme-substrate reaction is terminated by the addition of sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450nm ± 10nm. The concentration of Rat Tau in the samples is then determined by comparing the OD of the samples to the standard curve.

Standard curve

Concentration (pg/mL) OD Corrected OD
4000.00 2.096 2.028
2000.00 1.599 1.531
1000.00 1.205 1.137
500.00 0.892 0.824
250.00 0.577 0.509
125.00 0.323 0.255
62.50 0.234 0.166
0.00 0.068 0.000

Precision

Intra-assay Precision (Precision within an assay)：CV%<8%

Three samples of known concentration were tested twenty times on one plate to assess intra-assay precision.

Inter-assay Precision (Precision between assays)：CV%<10%

Three samples of known concentration were tested in forty separate assays to assess inter-assay precision.

Recovery

Matrices listed below were spiked with certain level of recombinant Tau and the recovery rates were calculated by comparing the measured value to the expected amount of Tau in samples.
Matrix Recovery range Average
serum(n=5) 96-107% 101%
EDTA plasma(n=5) 81-95% 88%
Heparin plasma(n=5) 83-95% 89%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Tau and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.
Matrix 1:2 1:4 1:8 1:16
serum(n=5) 83-103% 98-105% 92-101% 90-99%
EDTA plasma(n=5) 88-97% 93-103% 81-98% 78-90%
Heparin plasma(n=5) 96-102% 81-93% 79-91% 89-101%