IL21, Murine

GoldBio growth factors are manufactured for RESEARCH USE ONLY and cannot be sold for human consumption!Recombinant Murine Interleukin 21IL-21Interleukin-21 (IL21) 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 IL21 include induction of differentiation of T-cells-stimulated B-cells into plasma cells and memory B-cells, stimulation of IgG production with IL4, and induction of apoptotic effects in naive B-cells and stimulated B-cells in the absence of T-cell signaling. Additionally, IL21 promotes the anti-tumorigenic activity of CD8+ T-cells and natural killer (NK) cells. IL21 exerts its effect through binding to a specific type I cytokine receptor, IL21R, which also contains the gamma chain (γc) found in other cytokine receptors, including IL2, IL4, IL7, IL9 and IL15. The IL21/IL21R 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.Sterile Filtered White lyophilized powder. Purified and tested for use in cell culture.Source:Escherichia coliMW: ~15.0 kDa (129 amino acids) Purity: >98% by SDS-PAGE and HPLC analysesBiological Activity: Fully biologically active when compared to standard. The ED50as determined by a cell proliferation assay using human N1186 T cells is less than 25 ng/ml, corresponding to a specific activity of >4.0x104IU/mg.