IL-21 Rat anti-Mouse, eFluor 660, Clone: FFA21, eBioscience™

Rat Monoclonal Antibody

Brand: Affymetrix eBioscience

Manufacturer Part Number: 50-7211-82


UNSPSC: 12352200

Code: Z2

Additional Details:
Additional Details: Weight: 0.25000kg

Disclaimers: For Research Use Only.

Product Code. 15351950

Quantity Price
1 £244.00 / 100µg
Estimated Shipment date
from Supplier 27-10-2016
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Description and Specification


Antigen IL-21
Applications Flow Cytometry (Intracellular Staining)
Clone FFA21
Concentration 0.2mg/mL
Conjugate eFluor 660
Format Conjugated
Formulation aqueous buffer, 0.09% sodium azide, may contain carrier protein/stabilizer
Gene Alias Interleulin-21
Host Species Rat
Isotype IgG2a
Quantity 100μg
Regulatory Status RUO
Species Reactivity Mouse
Storage Requirements Store at 2-8°C. Do not freeze. Light-sensitive material.
Primary or Secondary Primary
Monoclonal or Polyclonal Monoclonal

This FFA21 monoclonal antibody reacts with mouse interleukin-21 (IL-21). IL-21 is a 17kDa immunomodulatory cytokine produced mainly by 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, IL-4 for Th2 and IL-17A for Th17, IL-21 is critical for TFH cell effector function. This cytokine 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 naïve 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. High levels of IL-21 are present in chemically-induced colitis models. IL-21-deficient mice are protected from developing colitis upon chemical treatment by their inability to upregulate Th17-associated molecules.

Preliminary data suggest that clone FFA21 recognizes a different epitope than anti-mouse IL-21 clone mhalx21 (cat. 51-7213).