168305
IL21 (Interleukin-21, IL-21)
Size
£914.00
- SKU:
- 168305
- Purity:
- Purified by Protein A affinity chromatography.
- Storage Conditions:
- -20°C
- Supplier:
- United States Biological
- Host:
- Rabbit
- Immunogen:
- Recombinant protein corresponding to aa24-152 from bovine IL-21, expressed in yeast.
- Format:
- Supplied as a liquid in 0.02M potassium phosphate, 0.15M sodium chloride, pH 7.2, 0.01% sodium azide.
- Extra Details:
- Interleukin-21(IL-21) is a secreted, type-I cytokine with immunoregulatory activity. Human IL-21 shares the common y-chain with IL-2, IL-4, IL-7, IL-9, and IL-15 proteins but, in addition, binds to a unique IL-21Ra chain which 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. Bovine and human IL-21 have pleiotropic functions and are mainly produced by activated T-cells in response to stimulation, but target a broad range of lymphoid and myeloid cells of the immune system (T cells, B cells, natural killer (NK) cells and dendritic cells). IL21 is therefore is able to regulate innate and acquired immune responses. The biological effects of IL-21 include induction of differentiation, maturation, and proliferation of T-cells-stimulated B-cells into plasma cells and memory B-cells, stimulation (in conjunction)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. Human IL-21 has also been shown to promote the tumor activity of CD8+ T-cells and NK cells. During T-cell mediated immune response, IL21 may inhibit dendritic cells’ (DC) activation and maturation. In synergy with IL15 and IL18, IL21 stimulates interferon gamma production in T-cells and NK cells; with the IL15, it may play a role in proliferation and maturation of natural killer (NK) cells. The open reading frame of the bovine IL-21 cDNA is 459 bp in length and encodes 152aa. The predicted aa sequence is 78-81% and 58-67% homologous to the predicted human and murine IL-21aa sequences, respectively. In one study, recombinant bovine IL-21 strongly induced NK cell proliferation using a human NK cell-line, NK0, and enhanced the lymphokine activated killer (LAK) activity of bovine peripheral blood mononuclear cells. In another by the same authors, recombinant bovine mature IL-21 induced the proliferation of human IL-2-dependent cells, ILT-MAT. IL-21 is ideal for investigators involved in Cancer and Immunology research. Applications: Suitable for use in ELISA and Western Blot. Other applications not tested. Recommended Dilution: ELISA: 1:6000 Western Blot: 1ug/ml Optimal dilutions to be determined by the researcher. Storage and Stability: May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
- Shipping Conditions:
- Blue Ice