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                                                              IL 21 Rat
                                                              英文名稱:IL 21 Rat總訪問:238
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                                                              產(chǎn)地/品牌:prospec產(chǎn)品類別:細(xì)胞生物學(xué)試劑
                                                              規(guī)       格:CYT-033 最后更新:2024-12-5
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                                                              Catalogue Number CYT-033
                                                              Synonyms Interleukin-21, IL-21, Il21.
                                                              Introduction IL-21 is produced by CD4+ T cells in response to antigenic stimulation. Its action enhances antigen-specific responses of immune cells. The biological effects of IL-21 include induction of differentiation of T-cells-stimulated B-cells into plasma cells and memory B-cells, stimulation (in conjuction) with IL-4 of IgG production, and induction of apoptotic effects in naive 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 (°C) 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.
                                                              Description Interleukin-21 Rat Recombinant produced in E.Coli is a single, non-glycosilated polypeptide chain containing 129 amino acids and having a total molecular mass of 15.2kDa.
                                                              The Rat IL-21 is purified by proprietary chromatographic techniques.
                                                              Source Escherichia Coli.
                                                              Physical Appearance Sterile Filtered White lyophilized (freeze-dried) powder.
                                                              Formulation Rat IL-21 was lyophilized from a 0.2µm filtered concentrated solution in PBS, pH 7.4.
                                                              Solubility It is recommended to reconstitute the lyophilized Rat IL21 in sterile 18M?-cm H2O not less than 100µg/ml, which can then be further diluted to other aqueous solutions.
                                                              Stability Lyophilized Rat IL-21 although stable at room temperature for 3 weeks, should be stored desiccated below -18°C. Upon reconstitution Rat IL21 should be stored at 4°C between 2-7 days and for future use below -18°C. For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA).
                                                              Please prevent freeze-thaw cycles.
                                                              Purity Greater than 95.0% as determined by:
                                                              (a) Analysis by RP-HPLC.
                                                              (b) Analysis by SDS-PAGE.
                                                              Amino acid sequence

                                                              HKSSPQRPDH LLIRLRHLMD IVEQLKIYEN DLDPELLTAP QDVKGQCEHE AFACFQKAKL KPSNTGNNKT FINDLLAQLR RRLPAKRTGN KQRHMAKCPS CDLYEKKTPK EFLERLKWLL QKMIHQHLS.

                                                              Biological Activity

                                                              The biological activity is measured by its ability to proliferate activated B cells.

                                                              Usage ProSpec's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.
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