Cattle ET-1(Endothelin1) ELISA Kit
Size: Price:
48 T $412.00
96 T $588.00


Product name: Cattle ET-1(Endothelin1) ELISA Kit
Reactivity: Cattle
Alternative Names: ET1; PPET1; Preproendothelin-1; Big endothelin-1; EDN1
Assay Type: Sandwich
Sensitivity: 4.74 pg/mL
Standard: 1000 pg/mL
Detection Range: 15.63-1000 pg/mL
Sample Type: serum, plasma, tissue homogenates, cell lysates, cell culture supernates and other biological fluids
Assay Length: 3.5h
Research Area: Endocrinology;Cardiovascular biology;
Uniprot ID: P17322
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 Cattle ET-1. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Cattle ET-1. 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 Cattle ET-1, 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 Cattle ET-1 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
1000.00 2.126 2.038
500.00 1.665 1.577
250.00 1.106 1.018
125.00 0.852 0.764
62.50 0.593 0.505
31.25 0.336 0.248
15.63 0.234 0.146
0.00 0.088 0.000


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.


Matrices listed below were spiked with certain level of recombinant ET-1 and the recovery rates were calculated by comparing the measured value to the expected amount of ET-1 in samples.
Matrix Recovery range Average
serum(n=5) 87-95% 91%
EDTA plasma(n=5) 81-95% 88%
Heparin plasma(n=5) 83-97% 90%


The linearity of the kit was assayed by testing samples spiked with appropriate concentration of ET-1 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) 88-103% 83-94% 92-105% 89-97%
EDTA plasma(n=5) 85-92% 83-101% 87-98% 79-92%
Heparin plasma(n=5) 86-97% 88-95% 92-101% 87-98%