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High Sensitivity Human IFN-γ (Interferon Gamma) ELISA Kit

Uniprot : P01579

Cat.No.:E-HSEL-H0007
Reactivity: Human

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High Sensitivity Series

New series of Elabscience® High Sensitivity (HS) ELISA kits have been iteratively upgraded through R&D process to increase the sensitivity of the traditional ELISA kits by 2-10 times, and can detect the protein concentration of fg level.
High Sensitivity (HS) ELISA Kit focuses on the detection of cytokines, and this series can effectively solve the problem of low detection rate when detecting low concentration samples such as serum and plasma.

Product Details

Properties

Assay type	Sandwich-ELISA
Format	48T/96T/96
Assay time	3.5h
Detection range	1.56-100 pg/mL
Sensitivity	0.98 pg/mL
Sample type &Sample volume	serum, plasma and other biological fluids; 100μL
Specificity	This kit recognizes Human IFN-γ in samples. No significant cross-reactivity or interference between Human IFN-γ and analogues was observed.
Reproducibility	Both intra-CV and inter-CV are < 10%.
Application	This ELISA kit applies to the in vitro quantitative determination of Human IFN-γ concentrations in serum, plasma and other biological fluids.

Test Principle

This ELISA kit uses the Sandwich-ELISA principle. The micro ELISA plate provided in this kit has been pre-coated with an antibody specific to Human IFN-γ. Standards or samples are added to the micro ELISA plate wells and combined with the specific antibody. Then a biotinylated detection antibody specific for Human IFN-γ and Avidin-Horseradish Peroxidase (HRP) conjugate are added successively to each micro plate well and incubated. Free components are washed away. The substrate solution is added to each well. Only those wells that contain Human IFN-γ, biotinylated detection antibody and Avidin-HRP conjugate will appear blue in color. The enzyme-substrate reaction is terminated by the addition of stop solution and the color turns yellow. The optical density (OD) is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The OD value is proportional to the concentration of Human IFN-γ. You can calculate the concentration of Human IFN-γ in the samples by comparing the OD of the samples to the standard curve.

Kit components & Storage

An unopened kit can be stored at 2-8℃ for 1 month. If the kit is not supposed to be used within 1 month, store the components separately according to the following conditions once the kit is received.

Item	Specifications	Storage
Micro ELISA Plate(Dismountable)	96T: 8 wells ×12 strips 48T: 8 wells ×6 strips	-20℃, 12 months
Reference Standard	96T: 2 vials 48T: 1 vial
Concentrated Biotinylated Detection Ab (100×)	96T: 1 vial, 120 μL 48T: 1 vial, 60 μL
Concentrated HRP Conjugate (100×)	96T: 1 vial, 120 μL 48T: 1 vial, 60 μL	-20℃(Protect from light), 12 months
Reference Standard & Sample Diluent	1 vial, 20 mL	2-8°C, 12 months
Biotinylated Detection Ab Diluent	1 vial, 14 mL
HRP Conjugate Diluent	1 vial, 14 mL
Concentrated Wash Buffer (25×)	1 vial, 30 mL
Substrate Reagent	1 vial, 10 mL	2-8℃(Protect from light)
Stop Solution	1 vial, 10 mL	2-8°C
Plate Sealer	5 pieces
Manual	1 copy
Certificate of Analysis	1 copy

Technical Data

Precision

Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level Human IFN-γ were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level Human IFN-γ were tested on 3 different plates, 20 replicates in each plate.

	Intra-assay Precision			Inter-assay Precision
Sample	1	2	3	1	2	3
n	20	20	20	20	20	20
Mean (pg/mL)	5.27	8.90	45.41	5.33	9.38	48.09
Standard deviation	0.31	0.42	1.40	0.36	0.44	1.72
CV (%)	5.92	4.76	3.08	6.72	4.71	3.58

Recovery

The recovery of Human IFN-γ spiked at three different levels in samples throughout the range of the assay was evaluated in various matrices.

Sample Type	Range (%)	Average Recovery (%)
Serum(n=8)	90-104	97
EDTA plasma (n=8)	90-103	95
Cell culture media (n=8)	95-109	100

Linearity

Samples were spiked with high concentrations of Human IFN-γ and diluted with Reference Standard & Sample Diluent to produce samples with values within the range of the assay.

Target Information

Database Links	SwissProt: P01579
Synonyms	IFNG, IFG, IFI, Type II Interferon
Research Area	Cancer, Immunology, Stem cells

Assay Procedures

	1. Add 100μL standard or sample to the wells. Incubate for 90 min at 37°C
	2. Discard the liquid, immediately add 100μL Biotinylated Detection Ab working solution to each well. Incubate for 60 min at 37°C
	3. Aspirate and wash the plate for 3 times
	4. Add 100μL HRP conjugate working solution. Incubate for 30 min at 37°C. Aspirate and wash the plate for 5 times
	5. Add 90μL Substrate Reagent. Incubate for 15 min at 37°C
	6. Add 50μL Stop Solution
	7. Read the plate at 450nm immediately. Calculation of the results

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