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Rat EDN2(Endothelin 2) ELISA Kit
ELK6274
Size： Price：
48 T $320.00
96 T $458.00
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Overview

Product name: Rat EDN2(Endothelin 2) ELISA Kit
Reactivity: Rat
Alternative Names: ET2; PPET2; Preproendothelin-2
Assay Type: Competitive Inhibition
Sensitivity: 2.66 pg/mL
Standard: 500 pg/mL
Detection Range: 7.82-500 pg/mL
Sample Type: Serum, plasma, tissue homogenates, cell lysates, cell culture supernates and other biological fluids.
Assay Length: 2h
Research Area: Cardiovascular biology;
Uniprot ID: P23943
Test principle: This assay employs the competitive inhibition enzyme immunoassay technique. The microtiter plate provided in this kit has been pre-coated with Rat EDN2. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Rat EDN2. Next, Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. After TMB substrate solution is added. 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 EDN2 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
500.00 0.175
250.00 0.367
125.00 0.583
62.50 0.857
31.25 1.152
15.63 1.511
7.82 1.762
0.00 2.132

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 EDN2 and the recovery rates were calculated by comparing the measured value to the expected amount of EDN2 in samples.
Matrix Recovery range Average
serum(n=5) 93-107% 100%
EDTA plasma(n=5) 83-97% 90%
Heparin plasma(n=5) 86-99% 86%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of EDN2 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) 91-98% 83-101% 87-98% 80-92%
EDTA plasma(n=5) 95-103% 90-99% 87-95% 89-97%
Heparin plasma(n=5) 92-106% 83-94% 85-98% 85-97%