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Human EIF2A(Eukaryotic Translation Initiation Factor 2 subunit alpha) ELISA Kit
ELK0541
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48 T $320.00
96 T $458.00
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Overview

Product name: Human EIF2A(Eukaryotic Translation Initiation Factor 2 subunit alpha) ELISA Kit
Reactivity: Human
Alternative Names: Eukaryotic translation initiation factor 2 subunit alpha (eIF-2-alpha; eIF-2A; eIF-2alpha)
Assay Type: Sandwich
Sensitivity: 31.5 pg/mL
Standard: 5000 pg/mL
Detection Range: 78.13-5000 pg/mL
Sample Type: tissue homogenates, cell lysates and other biological fluids
Assay Length: 3.5h
Research Area: Signal transduction;
Uniprot ID: Q9BY44
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 EIF2A. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Human EIF2A. 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 Human EIF2A, 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 Human EIF2A 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 2.045 1.962
2500.00 1.612 1.529
1250.00 1.194 1.111
625.00 0.796 0.713
312.50 0.508 0.425
156.25 0.318 0.235
78.13 0.226 0.143
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 EIF2A and the recovery rates were calculated by comparing the measured value to the expected amount of EIF2A in samples.
Matrix Recovery range Average
serum(n=5) 96-109% 102%
EDTA plasma(n=5) 81-95% 88%
Heparin plasma(n=5) 85-97% 91%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of EIF2A 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) 85-93% 87-96% 97-105% 95-102%
EDTA plasma(n=5) 86-96% 85-97% 89-101% 85-97%
Heparin plasma(n=5) 85-94% 90-99% 95-102% 82-90%