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Human DEFb112(Defensin Beta 112) ELISA Kit
ELK6531
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48 T $320.00
96 T $458.00
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Overview

Product name: Human DEFb112(Defensin Beta 112) ELISA Kit
Reactivity: Human
Alternative Names: DEFB-12
Assay Type: Sandwich
Sensitivity: 29.4 pg/mL
Standard: 5000 pg/mL
Detection Range: 78.13-5000 pg/mL
Sample Type: Serum, plasma and other biological fluids.
Assay Length: 3.5h
Research Area: Immune molecule;
Uniprot ID: Q30KQ8
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 Human DEFb112. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Human DEFb112. 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 Human DEFb112, 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 Human DEFb112 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
5000.00 2.183 2.099
2500.00 1.487 1.403
1250.00 1.069 0.985
625.00 0.752 0.668
312.50 0.527 0.443
156.25 0.262 0.178
78.13 0.218 0.134
0.00 0.084 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 DEFb112 and the recovery rates were calculated by comparing the measured value to the expected amount of DEFb112 in samples.
Matrix Recovery range Average
serum(n=5) 90-105% 97%
EDTA plasma(n=5) 88-102% 95%
Heparin plasma(n=5) 80-92% 86%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of DEFb112 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) 95-103% 79-97% 93-102% 87-103%
EDTA plasma(n=5) 85-104% 83-96% 95-103% 88-95%
Heparin plasma(n=5) 86-93% 93-101% 86-97% 90-101%