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The antibody was purified by affinity chromatography, and conjugated with PE under optimal conditions. The solution is free of unconjugated PE 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 immunofluorescent staining with flow cytometric analysis. Test size products are transitioning from 20 µl to 5 µl per test. Please check your vial or your CoA to find the suggested use of this reagent per million cells in 100 µl staining volume or per 100 µl of whole blood. It is recommended that the reagent be titrated for optimal performance for each application. Read more at www.biolegend.com/testsize regarding the test size change.
COA:
Enter Lot#:
Application References:
1. Rohman M, et al. 2007. FEBS Lett. 581:4001. 2. Onoda T, et al. 2007. Int. Immunol. 19:1191.
PMA+ionomycin-stimulated (6 hours) human peripheral blood lymphocytes were surface stained with CD3 APC, then intracellularly stained with 4BG1 PE
Interleukin 21 (IL-21) is a potent immunomodulatory cytokine mainly produced by NKT and CD4+ T-cells, particularly the inflammatory Th17 subset and has pleiotropic effects on both innate and adaptive immune responses. These actions include positive effects such as enhancing proliferation of NK cells and cytotoxic T cells, and inhibitory effects on the antigen-presenting function of dendritic cells. It can also be proapoptotic for B cells and NK cells. Recent studies have shown that IL-21 is also an autocrine cytokine that potently induces Th17 differentiation and suppresses Foxp3 expression, and serves as a target for treating inflammatory diseases.
Other Names:
Interleukin 21
Distribution:
Th17
Function:
Immunomodulation
Cellular Sources:
NK-T cells and T cells
Cellular Targets:
cytotoxic T cells (CTL) and Natural Killer (NK) cells, that can destroy malignant or infected cells
Receptors:
IL-21R
Antigen References:
1. Nurieva R. 2007. Nature 448:416. 2. Parrish-Novak J, et al. 2002. J. Leukocyte Biol. 72:856. 3. Dumoutier L, et al. 2000. Proc. Natl. Acad. Sci. USA 97:10144. 4. Asao H, et al. 2001. J. Immunol. 167:1. 5. Parrish-Novak J, et al. 2000. Nature 408:57.
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PE anti-human IL-21
PMA+ionomycin-stimulated (6 hours) human peripheral blood lymphocytes were surface stained with CD3 APC, then intracellularly stained with 4BG1 PE