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Invitrogen
Basic Human IL-21 ELISA Kit
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产品规格
检测灵敏度
20 pg/mL
测定范围
78-5,000 pg/mL
检测样本类型/体积
{Plasma=50 µL, Supernatant=50 µL, Serum=50 µL}
手工操作时间
1 hr 20 min
总时间
4 hr 10 min
均相（无需洗涤）
No
检测仪器
Absorbance Microplate Reader
产品规格
96 Tests
产品成分
Pre-coated 96 well plate
Standard
Sample Diluent
Assay Buffer concentrate
Biotinylated Detection Antibody
SAV-HRP
Wash Buffer
Chromogen
Stop Solution
Adhesive Plate Covers
Standard
Sample Diluent
Assay Buffer concentrate
Biotinylated Detection Antibody
SAV-HRP
Wash Buffer
Chromogen
Stop Solution
Adhesive Plate Covers
运输条件
Wet ice
储存
2-8°C
蛋白名称
IL-21
均相（无需洗涤）
Human
检测试剂盒格式
Sandwich ELISA Kit
检测抗体结合物
Biotin
标签或染料
HRP
关于本试剂盒
Kit Overview
The Human IL-21 ELISA kit enables the quantification of Human IL-21 in various biological samples, including human serum, plasma, buffered solutions, and cell culture medium. This assay is specifically designed to exclusively detect both natural and recombinant forms of Human IL-21.
Principle of the assay
The Human IL-21 solid-phase sandwich ELISA (enzyme-linked immunosorbent assay) follows a unique approach to measure the amount of the target molecule. It utilizes a matched pair of antibodies to capture the target and form a sandwich complex. The first antibody is pre-coated on the microplate wells, where samples, standards, or controls are added and bind to the immobilized antibody. The second antibody, acting as the detector, is then introduced, followed by the addition of a substrate solution that generates a measurable signal upon interaction with the enzyme-antibody-target complex. The intensity of this signal directly correlates to the concentration of the target present in the original specimen.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
靶标信息
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.
仅用于科研。不用于诊断过程。未经明确授权不得转售。
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生物信息学
基因别名 : CVID11, IL-21, IL21, Za11
基因ID : (Human) 59067
基因符号 : IL21
蛋白别名 : CX2, il 21, ILN, Interleukin, Interleukin21, IL-21, Interleukin-21, interleukin-21 isoform, Za11
UniProt ID (Human) Q9HBE4
