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Mouse BAFF/CD257(B-Cell Activating Factor) ELISA Kit
ELK3047
Size： Price：
48 T $320.00
96 T $458.00
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Overview

Product name: Mouse BAFF/CD257(B-Cell Activating Factor) ELISA Kit
Reactivity: Mouse
Alternative Names: CD257; TNFSF13B; BLYS; TALL1; THANK; TNFSF20; ZTNF4; B lymphocyte stimulator; Tumor Necrosis Factor Ligand Superfamily Member 13B; Dendritic cell-derived TNF-like; BAFF
Assay Type: Sandwich
Sensitivity: 4.9 pg/mL
Standard: 800 pg/mL
Detection Range: 12.5-800 pg/mL
Sample Type: serum, plasma, tissue homogenates and other biological fluids
Assay Length: 3.5h
Research Area: CD & Adhesion molecule;Tumor immunity;Infection immunity;Immune molecule;
Uniprot ID: Q9WU72
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 Mouse BAFF/CD257. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Mouse BAFF/CD257. 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 Mouse BAFF/CD257, 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 Mouse BAFF/CD257 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
800.00 2.169 2.065
400.00 1.724 1.620
200.00 1.132 1.028
100.00 0.852 0.748
50.00 0.522 0.418
25.00 0.388 0.284
12.50 0.236 0.132
0.00 0.104 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 BAFF/CD257 and the recovery rates were calculated by comparing the measured value to the expected amount of BAFF/CD257 in samples.
Matrix Recovery range Average
serum(n=5) 92-107% 99%
EDTA plasma(n=5) 80-95% 87%
Heparin plasma(n=5) 80-97% 88%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of BAFF/CD257 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) 86-94% 93-102% 89-97% 85-94%
EDTA plasma(n=5) 85-97% 87-96% 82-95% 92-105%
Heparin plasma(n=5) 85-92% 79-96% 89-101% 85-97%