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EasyStep Human VEGFA(Vascular Endothelial Growth Factor A) ELISA Kit
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ELK033ES
Size： Price：
48 T $320.00
96 T $458.00
96 T*5 $1947.00
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Overview

Product name: EasyStep Human VEGFA(Vascular Endothelial Growth Factor A) ELISA Kit
Reactivity: Human
Alternative Names: VEGF; VEGF-A; VPF; Vascular Endothelial Cell Growth Factor A; Vascular Permeability Factor
Assay Type: Sandwich
Sensitivity: 31 pg/mL
Standard: 5000 pg/mL
Detection Range: 78.2-5000 pg/mL
Sample Type: Serum, plasma
Assay Length: 1.5h
Research Area: Cytokine;Apoptosis;Tumor immunity;
Uniprot ID: P15692
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 VEGFA, and the Human VEGFA 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 VEGFA. After TMB substrate solution is added, only those wells that contain Human VEGFA 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 VEGFA 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 2.266 2.183
2500.00 1.674 1.591
1250.00 1.243 1.160
625.00 0.845 0.762
312.50 0.585 0.502
156.25 0.293 0.210
78.13 0.179 0.096
0.00 0.083 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 VEGFA and the recovery rates were calculated by comparing the measured value to the expected amount of VEGFA 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%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of VEGFA 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) 98-105% 92-101% 85-105% 87-98%
EDTA plasma(n=5) 88-104% 84-98% 95-105% 88-102%
Heparin plasma(n=5) 88-95% 98-107% 90-99% 88-97%

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