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The antibody was purified by affinity chromatography and conjugated with Brilliant Violet 421™ under optimal conditions. The solution is free of unconjugated Brilliant Violet 421™ and unconjugated antibody.
Storage & Handling:
The antibody solution should be stored undiluted at 4°C and protected from prolonged exposure to light. Do not freeze.
Each lot of this antibody is quality control tested by intracellular immunofluorescent staining with flow cytometric analysis. For immunofluorescent staining, the suggested use of this reagent is ≤5 µl per million cells or 5 µl per 100 µl of whole blood. It is recommended that the reagent be titrated for optimal performance for each application.
Brilliant Violet 421™ excites at 405 nm and emits at 421 nm. The standard bandpass filter 450/50 nm is recommended for detection. Brilliant Violet 421™ is a trademark of Sirigen Group Ltd.
ELISA or ELISPOT Detection5: The biotinylated 4S.B3 antibody is useful as a detection antibody for a sandwich ELISA or ELISPOT assay, when used in conjunction with purified NIB42 antibody (Cat. No. 502402/502404) or purified MD-1 antibody (Cat. No. 507502/507513) as the capture antibody. Flow Cytometry3,4,6-8: The fluorochrome-labeled 4S.B3 antibody is useful for intracellular immunofluorescent staining and flow cytometric analysis to identify IFN-γ -producing cells within mixed cell populations. Additional reported applications (for the relevant formats) include: neutralization1,2, Western blotting, immunohistochemical staining of paraformaldehyde-fixed, saponin-treated tissue sections, and immunocytochemistry. The 4S.B3 antibody can neutralize the bioactivity of natural or recombinant IFN-γ. Note: For testing human IFN-γ in serum or plasma, BioLegend's ELISA Max™ Sets (Cat. No. 430101 to 430106) are specially developed and recommended.
Human peripheral blood lymphocytes were stimulated with PMA + Ionomycin for 6 hours (in the presence of monensin), surface stained with CD3 FITC, fixed, permeabilized, and then stained with IFN-γ (clone 4S.B3) Brilliant Violet 421™ (top) or mouse IgG1, κ Brilliant Violet 421™ isotype control (bottom).
Interferon-γ is a potent multifunctional cytokine which is secreted primarily by activated NK cells and T cells. Originally characterized based on anti-viral activities, IFN-γ also exerts anti-proliferative, immunoregulatory, and proinflammatory activities. IFN-γ can upregulate MHC class I and II antigen expression by antigen-presenting cells.
Other Names:
Interferon-γ, Immune interferon, Type II interferon, T cell interferon, Macrophage-activating factor (MAF), IFN-g, IFN-gamma
Structure:
Cytokine; dimer; 20-25 kD (Mammalian)
Regulation:
Upregulated by IL-2, FGF-basic, EGF; downregulated by vitamin D3 or DMN; labile at pH2
Cellular Sources:
CD8+ and CD4+ T cells, NK cells
Cellular Targets:
T cells, B cells, macrophages, NK cells, endothelial cells, fibroblasts
Receptors:
IFN-γRα (CDw119) dimerized with IFN-γRβ (AF-1)
Bioactivity/Activities:
Antiviral/antiparasitic activities; inhibits proliferation; enhances MHC class I and II expression on APC
Antigen References:
1. Fitzgerald K, et al. Eds. 2001. The Cytokine FactsBook. Academic Press, San Diego. 2. De Maeyer E, et al. 1992. Curr. Opin. Immunol. 4:321. 3. Farrar M, et al. 1993. Annu. Rev. Immunol. 11:571. 4. Gray P, et al. 1987. Lymphokines 13:151.
*These products may be covered by one or more Limited Use Label Licenses (see the BioLegend Catalog or our website, www.biolegend.com/terms). BioLegend products may not be transferred to third parties, resold, modified for resale, or used to manufacture commercial products, reverse engineer functionally similar materials, or to provide a service to third parties without written approval of BioLegend. By use of these products you accept the terms and conditions of all applicable Limited Use Label Licenses. Unless otherwise indicated, these products are for research use only and are not intended for human or animal diagnostic, therapeutic or commercial use.
This data display is provided for general comparisons between formats. Your actual data may vary due to variations in samples, target cells, instruments and their settings, staining conditions, and other factors. If you need assistance with selecting the best format contact our expert technical support team.
PE anti-human IFN-γ
PMA/Ionomycin-stimulated human PBMCs were stained with CD3 PE/Cy5 and 4S.B3 PE
APC anti-human IFN-γ
PMA/Ionomycin-stimulated human PBMCs were stained with CD3 PE/Cy5 and 4S.B3 PE
FITC anti-human IFN-γ
PMA/ionomycin-stimulated (6 hours) human peripheral blood lymphocytes stained with mouse IgG1 FITC isotype control and CD3 (UCHT1) APC
PMA/ionomycin-stimulated (6 hours) human peripheral blood lymphocytes stained with 4S.B3 FITC and CD3 (UCHT1) APC
Biotin anti-human IFN-γ
Purified anti-human IFN-γ
PMA/Ionomycin-stimulated human PBMCs were stained with CD3 PE/Cy5 and 4S.B3 PE
Alexa Fluor® 488 anti-human IFN-γ
PMA/ionomycin-stimulated (6 hours) human peripheral blood lymphocytes stained with mouse IgG1 Alexa Fluor® 488 isotype control and CD3 (UCHT1) APC
PMA/ionomycin-stimulated (6 hours) human peripheral blood lymphocytes stained with 4S.B3 Alexa Fluor® 488 and CD3 (UCHT1) APC
Alexa Fluor® 647 anti-human IFN-γ
PMA/ionomycin-stimulated (6 hours) human peripheral blood lymphocytes stained with mouse IgG1 Alexa Fluor® 647 isotype control and CD3 (UCHT1) PE
PMA/ionomycin-stimulated (6 hours) human peripheral blood lymphocytes stained with 4S.B3 Alexa Fluor® 647 and CD3 (UCHT1) PE
Alexa Fluor® 700 anti-human IFN-γ
PMA+ionomycin-stimulated (5 hours) human PBMCs surface stained with CD3 PE and intracellular stained with 4S.B3 Alexa Fluor® 700
Pacific Blue™ anti-human IFN-γ
PMA+ionomycin-stimulated (6 hours) human peripheral blood lymphocytes intracellularly stained with 4S.B3 Pacific Blue™ and CD3 (HIT3a) PE
PerCP/Cy5.5 anti-human IFN-γ
PMA+ionomycin-stimulated (6 hours) human peripheral blood lymphocytes intracellular stained with 4S.B3 PerCP/Cy5.5
APC/Cy7 anti-human IFN-γ
PMA+Ionomycin-stimulated human peripheral blood lymphocytes intracellularly stained with IFN-γ (4S.B3) APC/Cy7 and CD3 (OKT3) PE
PE/Cy7 anti-human IFN-γ
PMA/ionomycin-stimulated (5 hours) human peripheral blood lymphocytes intracellularly stained with 4S.B3 PE/Cy7 and CD4 (RPA-T4) PE
Brilliant Violet 421™ anti-human IFN-γ
Human peripheral blood lymphocytes were stimulated with PMA + Ionomycin for 6 hours (in the presence of monensin), surface stained with CD3 FITC, fixed, permeabilized, and then stained with IFN-γ (clone 4S.B3) Brilliant Violet 421™ (top) or mouse IgG1, κ Brilliant Violet 421™ isotype control (bottom).
Brilliant Violet 570™ anti-human IFN-γ
PMA/ionomycin-stimulated (6 hours) human peripheral blood lymphocytes were surface stained with CD3 FITC, and then intracellularly stained with IFN-γ (clone 4S.B3) Brilliant Violet 570™ (top) or mouse IgG1, κ Brilliant Violet 570™ isotype control (bottom).
Brilliant Violet 605™ anti-human IFN-γ
PMA+ionomycin-stimulated (6 hours) human peripheral blood lymphocytes were surface stained with CD3 FITC, and then intracellularly stained with IFN-γ (clone 4S.B3) Brilliant Violet 605™.
Brilliant Violet 650™ anti-human IFN-γ
PMA+ionomycin-stimulated (6 hours) human peripheral blood lymphocytes were surface stained with CD3 FITC, and then intracellularly stained with IFN-γ (clone 4S.B3) Brilliant Violet 650™.
Brilliant Violet 711™ anti-human IFN-γ
PMA+ionomycin-stimulated (6 hours) human peripheral blood lymphocytes (in the presence of monensin) were surface stained with CD3 FITC, and then intracellularly stained with IFN-γ (clone 4S.B3) Brilliant Violet 711™ (top) or mouse IgG1, κ Brilliant Violet 711™ isotype control (bottom).
Brilliant Violet 785™ anti-human IFN-γ
PMA+ionomycin-stimulated (6 hours) human peripheral blood lymphocytes were surface stained with CD3 FITC, and then intracellularly stained with IFN-γ (clone 4S.B3) Brilliant Violet 785™.
