Search
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.
Bioinformatics
Gene aliases : CVID11, IL-21, IL21, Za11
Gene ID : (Human) 59067
Gene symbol : IL21
Protein Aliases : CX2, il 21, ILN, Interleukin, Interleukin21, IL-21, Interleukin-21, interleukin-21 isoform, Za11
UniProt ID (Human) Q9HBE4
Performance Guarantee
If an Invitrogen™ immunoassay 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.*
Learn more
We're here to help
Get expert recommendations for common problems or connect directly with an on staff expert for technical assistance related to applications, equipment and general product use.
Contact tech support