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EasyStep Human OPG(Osteoprotegerin) ELISA Kit
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ELK034ES
Size： Price：
48 T $320.00
96 T $458.00
96 T*5 $1947.00
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Overview

Product name: EasyStep Human OPG(Osteoprotegerin) ELISA Kit
Reactivity: Human
Alternative Names: TNFRSF11B; TNFRSF11-B; OCIF; OPG; TR1; Tumor Necrosis Factor Receptor Superfamily Member 11b; Osteoclastogenesis Inhibitory Factor
Assay Type: Sandwich
Sensitivity: 23.6 pg/mL
Standard: 2000 pg/mL
Detection Range: 31.25-2000 pg/mL
Sample Type: Serum
Assay Length: 1.5h
Research Area: Cytokine;Metabolic pathway;Bone metabolism;
Uniprot ID: O00300
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 OPG, and the Human OPG standard plate wells that pre-coated using protein-related techniques are provided separately. Standard/Sample Diluent Buffer or samples are added to the appropriate microtiter plate wells ,then added a HRP-conjugated antibody specific to Human OPG. After TMB substrate solution is added, only those wells that contain Human OPG and HRP-conjugated antibody 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 OPG 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
2000.00 2.154 2.072
1000.00 1.534 1.452
500.00 1.135 1.053
250.00 0.847 0.765
125.00 0.535 0.453
62.50 0.386 0.304
31.25 0.175 0.093
0.00 0.082 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 OPG and the recovery rates were calculated by comparing the measured value to the expected amount of OPG in samples.
Matrix Recovery range Average
serum(n=5) 80-96% 88%
EDTA plasma(n=5) 87-99% 93%
Heparin plasma(n=5) 83-99% 95%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of OPG 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) 87-96% 85-97% 85-94% 87-96%
EDTA plasma(n=5) 93-102% 93-106% 87-101% 91-104%
Heparin plasma(n=5) 89-97% 93-102% 81-96% 93-106%

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