Invitrogen

IL-21 Recombinant Rabbit Monoclonal Antibody (18H2L4)

产品信息

701111

应用

建议稀释比

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酶联免疫吸附实验 (ELISA)

1-3 µg/mL

产品规格

种属反应

Human

宿主/亚型

Rabbit / IgG

Expression System

Expi293

分类

Recombinant Monoclonal

类型

Antibody

克隆号

18H2L4

抗原

Recombinant protein corresponding to amino acids 37-162 of human IL-21

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偶联物

Unconjugated Unconjugated Unconjugated

形式

Liquid

浓度

0.5 mg/mL

纯化类型

Protein A

保存液

PBS

内含物

0.09% sodium azide

保存条件

Store at 4°C short term. For long term storage, store at -20°C, avoiding freeze/thaw cycles.

运输条件

Wet ice

AB_2532394

产品详细信息

This antibody is predicted to react with non-human primate, mouse and rat based on sequence homology.

Intact IgG appears on a non-reducing gel as ~150 kDa band and upon reduction generating a ~25 kDa light chain band and a ~50 kDa heavy chain.

Recombinant rabbit monoclonal antibodies are produced using in vitro expression systems. The expression systems are developed by cloning in the specific antibody DNA sequences from immunoreactive rabbits. Then, individual clones are screened to select the best candidates for production. The advantages of using recombinant rabbit monoclonal antibodies include: better specificity and sensitivity, lot-to-lot consistency, animal origin-free formulations, and broader immunoreactivity to diverse targets due to larger rabbit immune repertoire.

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.

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