Interleukin 21, Recombinant, Human (IL-21)
Pricing
For pricing information, USA customers sign in. Outside USA? Please contact your distributor for pricing. Specifications
| Interleukin-21 (IL-21), expressed by activated CD4(+) T cells, is the newest member of the common gamma-chain family of cytokines, which includes IL-2, IL-4, IL-7, IL-9, IL-13, and IL-15. Its private receptor, IL-21R, is expressed on T, B, and NK cells. Within the B cell lineage, IL-21 regulates IgG1 production and cooperates with IL-4 for the production of multiple Ab classes in vivo. IL-21R has been shown to activate the Janus kinase/signal transducers and activators of transcription signaling pathway upon ligand binding. Initial studies have demonstrated that IL-21 has pleiotropic effects on the proliferation, differentiation, and effector functions of B, T, natural killer, and dendritic cells. | | | Catalog # | I8442-15B | | Endotoxin | <0.01ng/ug or <0.1EU/ug as per LAL | | AA Sequence | MQDRHMIRMR QLIDIVDQLK NYVNDLVPEF LPAPEDVETN CEWSAFSCFQ KAQLKSANTG NNERIINVSI KKLKRKPPST NAGRRQKHRL TCPSCDSYEK KPPKEFLERF KSLLQKMIHQ HLSSRTHGSE DS | | Biological Activity | rHuIL-2 is fully biologically active when compared to standard. The ED50 as determined by the dose-dependent stimulation of murine CTLL-2 cells is less then 0.0645ng/ml, corresponding to a Specific Activity of 16.9 MIU/mg | | Storage and Stability | Lyophilized powder may be stored at -20°C. Stable for 12 months at -20°C. Reconstitute with sterile ddH2O, aliquot and store at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer. | | Molecular Weight | 15.5kD | | Source | Recombinant, human, E. coli | | Purity | 95% as determined by RP-HPLC; Reducing and non-reducing SDS-PAGE. | | Form | Supplied as a lyophilized powder. Reconstitute with sterile dH2O PBS to 0.1-1mg/ml, which can be further diluted into other aqueous solutions. | | | Important Note | This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological. |
External Links
|
