Invitrogen™ eBioscience™ Human IL-21, Recombinant Protein
Human Recombinant Protein
Brand: Invitrogen™ 14-8219-62
Code : NEW
Additional Details : Weight : 0.09500kg
DescriptionHuman Interleukin-21 (IL-21) is a 131-amino acid protein with 57% identity to the mouse gene. It contains a 24-amino acid signal peptide and a 4-helix-bundle cytokine domain homologous to IL-2, IL-4 and IL-15. IL-21 stimulates B cell proliferation in an anti-CD40 dependent manner but inhibits B cell proliferation stimulated by IL-4 plus anti-IgM. IL-21 is induced by IL-6 in activated T cells, a process that is dependent on STAT3 but not on ROR-gamma. IL-21 induces Th17 differentiation and suppresses FOXP3 expression, which requires STAT3 and ROR-gamma.
|Cytokine Bioassays , ELISA Recombinant Standard|
|The protein has a predicted molecular mass of 17,150. The DTT reduced protein migrates as a 18kDa polypeptide on SDS-PAGE. The non-reduced protein migrates as a 17kDa polypeptide.|
|Store at less than or equal to -70°C.|
|A DNA sequence encoding the mature form of human IL-21amino acids Gln25-Ser155 accession # NM_021803 was expressed in E.coli|
|Sterile liquid; 20mM sodium phosphate, pH 7.2, 0.6M NaCl, 1.0% BSA. 0.22μm filtered.|
|Less than 0.01ng/ug cytokine as determined by the LAL assay.|
|The ED50 of this protein, as measured by B9 cell proliferation assay, is less than or equal to 25ng/mL. This corresponds to a specific activity of greater than or equal to 4 x 104 Units/mg.|
For Research Use Only.