Human ESM1(Endothelial Cell Specific Molecule 1) ELISA Kit
Specification: Price:
48 T $320.00
96 T $458.00


Product name: Human ESM1(Endothelial Cell Specific Molecule 1) ELISA Kit
Reactivity: Human
Alternative Names: Endocan
Assay Type: Sandwich
Sensitivity: 6.2 pg/mL
Standard: 1000 pg/mL
Range: 15.63-1000 pg/mL
Sample Type: serum, plasma, tissue homogenates, cell lysates and other biological fluids
Assay Length: 3.5h
Research Area: Metabolic pathway;Tumor immunity;Infection immunity;Cardiovascular biology;
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 Endothelial Cell Specific Molecule 1(ESM1). Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Endothelial Cell Specific Molecule 1(ESM1). 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 Endothelial Cell Specific Molecule 1(ESM1), 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 Endothelial Cell Specific Molecule 1(ESM1) in the samples is then determined by comparing the OD of the samples to the standard curve.

Standard curve

Concentration (ng/mL) OD Corrected OD
1000.00 2.035 1.953
500.00 1.703 1.621
250.00 1.174 1.092
125.00 0.757 0.675
62.50 0.596 0.514
31.25 0.332 0.250
15.63 0.226 0.144
0.00 0.082 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 ESM1 and the recovery rates were calculated by comparing the measured value to the expected amount of ESM1 in samples.
Matrix Recovery range Average
serum(n=5) 80-95% 87%
EDTA plasma(n=5) 80-95% 87%
Heparin plasma(n=5) 86-99% 92%


The linearity of the kit was assayed by testing samples spiked with appropriate concentration of ESM1 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) 88-97% 93-103% 94-106% 91-101%
EDTA plasma(n=5) 88-101% 93-106% 85-95% 92-104%
Heparin plasma(n=5) 82-96% 95-102% 87-98% 81-97%