Related Product Information for IL-21 active protein
IL-21 is a pleiotropic cytokine produced by CD4+ T cells in response to antigenic stimulation. Its action generally enhances antigen-specific responses of immune cells. The biological effects of IL-21 include: inducing the differentiation of T-cell-stimulated B-cells into plasma cells and memory B-cells; the stimulation of IgG production in conjunction with IL-4; and the induction of apoptotic effects in na¯ve B-cells and stimulated B-cells in the absence of T-cell signaling. Additionally, IL-21 promotes the anti-tumor activity of CD8+ T-cells and NK cells. IL-21 exerts its effect through binding to a specific type I cytokine receptor, IL-21R, which also contains the gamma chain found in other cytokine receptors, including IL-2, IL-4, IL-7, IL-9 and IL-15. The IL-21/IL-21R interaction triggers a cascade of events, which includes activation of the tyrosine kinases JAK1 and JAK3, followed by activation of the transcription factors STAT1 and STAT3. Recombinant Human IL-21 is a 15.4 kDa protein consisting of 132 amino acid residues.
Product Categories/Family for IL-21 active protein
NCBI Description
This gene encodes a member of the common-gamma chain family of cytokines with immunoregulatory activity. The encoded protein plays a role in both the innate and adaptive immune responses by inducing the differentiation, proliferation and activity of multiple target cells including macrophages, natural killer cells, B cells and cytotoxic T cells. Dysregulation of this gene plays a role in multiple immune-mediated diseases including lupus, psoriasis and chronic inflammatory diseases. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Dec 2011]
Uniprot Description
IL21: Cytokine with immunoregulatory activity. May promote the transition between innate and adaptive immunity. Induces the production of IgG(1) and IgG(3) in B-cells. May play a role in proliferation and maturation of natural killer (NK) cells in synergy with IL15. May regulate proliferation of mature B- and T-cells in response to activating stimuli. In synergy with IL15 and IL18 stimulates interferon gamma production in T-cells and NK cells. During T-cell mediated immune response may inhibit dendritic cells (DC) activation and maturation. Belongs to the IL-15/IL-21 family. 2 isoforms of the human protein are produced by alternative splicing.
Protein type: Apoptosis; Cell development/differentiation; Cytokine; Secreted; Secreted, signal peptide
Chromosomal Location of Human Ortholog: 4q27
Molecular Function: hematopoietin/interferon-class (D200-domain) cytokine receptor binding; interleukin-2 receptor binding
Biological Process: cell maturation; positive regulation of B cell proliferation; positive regulation of cell proliferation; positive regulation of cytokine production; positive regulation of inflammatory response; positive regulation of interleukin-17 production; positive regulation of natural killer cell mediated cytotoxicity; positive regulation of T cell proliferation; positive regulation of tissue remodeling; positive regulation of tyrosine phosphorylation of Stat1 protein; positive regulation of tyrosine phosphorylation of Stat3 protein; tyrosine phosphorylation of Stat3 protein
Disease: Immunodeficiency, Common Variable, 11
Product Notes
The IL-21 il21 (Catalog #
AAA692297) is an Active Protein produced from E Coli and is intended for research purposes only. The product is available for immediate purchase. The Human IL-21 reacts with Human and may cross-react with other species as described in the data sheet. The amino acid sequence is listed below: MQDRHMIRMR QLIDIVDQLK NYVNDLVPEF LPAPEDVETN CEWSAF SCFQ KAQLKSANTG NNERIINVSI KKLKRKPPST NAGRRQKHRL T CPSCDSYEK KPPKEFLERF KSLLQKMIHQ HLSSRTHGSE DS.
It is sometimes possible for the material contained within the vial of
"IL-21, Active Protein" to become dispersed throughout the inside of
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