Thermo Fisher Scientific IL-21 Polyclonal Antibody

Applications

Tested Dilution

Publications

Western Blot (WB)

0.1 µg/mL

-

Immunocytochemistry (ICC/IF)

5-15 µg/mL

-

ELISA (ELISA)

0.1-0.4 µg/mL (Detection), 0.2-0.8 µg/mL (Capture)

-

Neutralization (Neu)

0.2-2 µg/mL

-

Product Specifications

Species Reactivity

Mouse

Host/Isotype

Goat / IgG

Class

Polyclonal

Type

Antibody

Immunogen

E. coli-derived recombinant mouse IL-21 Pro25-Ser146 if (typeof window.$mangular === undefined || !window.$mangular) { window.$mangular = {}; } $mangular.antigenJson = \[{targetFamily:IL-21,uniProtId:Q9ES17-1,ncbiNodeId:10090,antigenRange:25-146,antigenLength:146,antigenImageFileName:PA5-46962_IL-21_Q9ES17-1_Goat.svg,antigenImageFileNamePDP:PA5-46962_IL-21_Q9ES17-1_Goat_PDP.jpeg,sortOrder:2}\]; $mangular.isB2BCMGT = false; $mangular.isEpitopesModalImageMultiSizeEnabled = true;

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Conjugate

Unconjugated Unconjugated Unconjugated

Form

Lyophilized

Concentration

0.2 mg/mL

Purification

Antigen affinity chromatography

Storage buffer

PBS with 5% trehalose

Contains

No Preservative

Storage conditions

-20° C, Avoid Freeze/Thaw Cycles

Shipping conditions

Ambient (domestic); Wet ice (international)

RRID

AB_2605560

Product Specific Information

In sandwich ELISAs, less than 0.5% cross-reactivity with recombinant mouse (rm) IL-2, rmIL-4, rmIL-15, and recombinant human IL-21 is observed.

Reconstitute at 0.2 mg/mL in sterile PBS.

Endoxin level is <0.30 EU per 1 µg of the antibody by the LAL method.

Target Information

IL-21 is a 17 kDa immunomodulatory cytokine produced mainly by Natural Killer Cells (NKT), T helper (Th) 17 and T follicular helper (TFH) cells. In TFH cells, IL-21 expression leads to autocrine signaling through the IL-21 receptor (IL-21R) and STAT3, which leads to additional transcriptional activation by Bcl6. As with IFN gamma for Th1 and IL-4 for Th2 cells, IL-21 is critical for TFH cell development and effector function. IL-21 plays a role in T cell-dependent B cell differentiation into plasma cells and memory cells, stimulation of IgG production and induction of apoptotic signaling in naive B cells. In Th17 cells, IL-21 expression and autocrine feedback through STAT3, IRF4 and ROR gamma t lead to upregulation of the IL-23R, thereby preparing Th17 cells for maturation and maintenance by the inflammatory cytokine IL-23. While upregulating IRF4 and ROR gamma t, IL-21 also mediates the downregulation of Foxp3. IL-21 deficient mice are protected from developing colitis upon chemical treatment by their inability to upregulate Th17-associated molecules. In comparison, elevated levels of IL-21 are present in chemically-induced colitis mouse models.

For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.