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Product Specifications
Analytical sensitivity
Lot-specific
Assay range
Lot-specific
Hands-on time
1 hr 45 min
Time-to-result
24 hr 30 min
Homogenous (no wash)
No
Instrument
Absorbance Microplate Reader
Product size
10 x 96 Tests
Contents
This Human IL-21 ELISA Kit includes Capture Antibody, Detection Antibody, Protein Standard, and HRP-conjugate. The HRP-conjugate is packaged separately.
Storage
Refer to product documentation for component specific storage temperature.
Protein name
IL-21
Protein family
Growth Factors & Receptors
Species (tested)
Human
Assay kit format
ELISA Development Kit
Detector antibody conjugate
Biotin
Label or dye
HRP
About This Kit
900-K226K consists of: 900-K226 (capture antibody, detection antibody, and protein standard), and AVIDIN-60UL (avidin HRP-conjugate).
Human IL-21 ABTS ELISA Development Kit contains the key components required for the quantitative measurement of natural and/or recombinant human IL-21 in a sandwich ELISA format. Human IL-21 ABTS ELISA Development Kit contains enough material to assay the target cytokine in at least 1,000 ELISA plate wells.
The ABTS ELISA Buffer Kit (Product # 900-K00), sold separately, is recommended to be used in conjunction with this ABTS ELISA Development Kit for optimal performance. This buffer kit contains all the necessary components to assay ten 96-well ELISA plates (included) and contains detailed handling instructions.
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.
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Bioinformatics
Gene aliases : CVID11, IL-21, IL21, Za11
Gene ID : (Human) 59067
Gene symbol : IL21
Protein Aliases : CX2, ILN, Interleukin, Interleukin21, il 21, IL-21, Interleukin-21, interleukin-21 isoform, Za11
UniProt ID (Human) Q9HBE4
Performance Guarantee
If an Invitrogen™ antibody doesn't perform as described on our website or datasheet,we'll replace the product at no cost to you, or provide you with a credit for a future purchase.*
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