IL-21 Recombinant Protein

IL-21 Recombinant Protein

• Description: 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 naïve 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 γ chain (γc) 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 Rat IL‐21 is a 15.3 kDa protein containing 130 amino acid residues.
• Synonyms: IL21, Interleukin-21
• CAS Number: 9000-83-3
• NCBI Gene ID: 365769
• UniProt: A3QPB9
• Accession Number: NP_001102413.1
• Accession Number mRNA: NM_001108943.2
• Host: E. coli
• Origin Species: Rat
• Species Reactivity: Rat
• Sequence: MHKSSPQRPD HLLIRLRHLM DIVEQLKIYE NDLDPELLTA PQDVKGQCEH EAFACFQKAK LKPSNTGNNK TFINDLLAQL RRRLPAKRTG NKQRHMAKCP SCDLYEKKTP KEFLERLKWL LQKMIHQHLS
• Detection Range: Determined by its ability to stimulate the proliferation of human ANBL-6 cells. The expected ED50 is ≤ 0.5 ng/ml, corresponding to a specific activity of ≥ 2 x 106 units/mg.
• Endotoxin: < 0.1 ng/µg of protein (<1EU/µg)
• Purity: ≥ 98% by SDS-PAGE gel and HPLC analyses.
• Length: 130
• Form: Lyophilized
• Molecular Weight: 15.3 kDa
• Shipping Conditions: Room Temperature