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ELK Biotechnology

ELK9807

Horse CD8(Cluster ofDifferentiation 8) ELISA Kit

Horse CD8(Cluster ofDifferentiation 8) ELISA Kit

Sensitivity

Horse CD8(Cluster ofDifferentiation 8) ELISA Kit

Overview

Product name: Horse CD8(Cluster ofDifferentiation 8) ELISA Kit
Reactivity: Horse
Alternative Names: p32; CD8-A; Leu2; MAL; T-cell surface glycoprotein CD8 alpha chain; T-lymphocyte differentiation antigen T8/Leu-2; CD8a; Cluster Of Differentiation 8a
Assay Type: Sandwich
Sensitivity: 0.64 ng/mL
Standard: 100 ng/mL
Detection Range: 1.57-100 ng/mL
Sample Type: Tissue homogenates, cell lysates, cell culture supernates and other biological fluids.
Assay Length: 3.5h
Research Area: Signal transduction;CD & Adhesion molecule;Tumor immunity;Infection immunity;Immune molecule;
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 Horse CD8. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Horse CD8. 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 Horse CD8, 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 Horse CD8 in the samples is then determined by comparing the OD of the samples to the standard curve.

Standard curve

Concentration (ng/mL) OD Corrected OD
100.00 2.131 2.030
50.00 1.612 1.511
25.00 1.277 1.176
12.50 0.847 0.746
6.25 0.579 0.478
3.13 0.357 0.256
1.57 0.258 0.157
0.00 0.101 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 CD8 and the recovery rates were calculated by comparing the measured value to the expected amount of CD8 in samples.
Matrix Recovery range Average
serum(n=5) 85-97% 91%
EDTA plasma(n=5) 87-99% 93%
Heparin plasma(n=5) 92-106% 99%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of CD8 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) 78-92% 87-98% 89-96% 90-99%
EDTA plasma(n=5) 95-106% 87-101% 88-102% 89-103%
Heparin plasma(n=5) 93-104% 89-97% 85-94% 86-93%
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