Recombinant IL-21, Mouse
Catalogue Numbers: BK0099-10, BK0099-50
Sizes: 10μg, 50μg
Source: Escherichia coli
Molecular Weight: 15.1 kDa, observed by reducing SDS-PAGE.
Purity: > 95% as analyzed by SDS-PAGE.
Biological Activity: ED50 < 1 ng/mL, measured by its ability to stimulate the proliferation of human ANBL-6 cells, corresponding to a specific activity of > 1.0× 10ˆ6 units/mg.
Physical Appearance: Sterile Filtered White lyophilized (freeze-dried) powder.
Formulation: Lyophilized after extensive dialysis against PBS.
AA Sequence: MHKSSPQGP DRLLIRLRHL IDIVEQLKIY ENDLDPELLS APQDVKGHCE HAAFACFQKA KLKPSNPGNN KTFIIDLVAQ LRRRLPARRG GKKQKHIAKC PSCDSYEKRT PKEFLERLKW LLQKMIHQHL S
Endotoxin: < 0.2 EU/μg, determined by LAL method.
Reconstitution: Reconstituted in ddH2O or PBS at 100 μg/ml.
Storage: Lyophilized recombinant mouse interleukin-21 (IL-21) remains stable up to 6 months at -80°C from date of receipt. Upon reconstitution, mouse interleukin-21 (IL-21) should be stable up to 1 week at 4°C or up to 2 months at -20°C.
Usage: This material is offered by USA Bioworld biotech for research, laboratory or further evaluation purposes. For research use only.
Description: Interleukin-21 (IL-21) belongs to the Type I four helix bundle cytokines, and shares the common cytokine receptor γ chain with IL-2, IL-4, IL-7, IL-9, and IL-15. IL-21 is expressed by CD4+ T cells, natural killer (NK) T cells, and Th17 cells. The IL-21 receptor is highly expressed on CD4+ and CD8+ B cells. IL-21 plays a pivotal role in the survival and proliferation of B cells, and their differentiation to immunoglobulin (Ig) producing cells. IL-21regulates the production of IgG1 and IgE by B cells, and diminishes the severity of allergy and asthma. In some cases, IL-21 induces B cell apoptosis. Other roles of IL-21 include regulation of the innate immune system, implication in autoimmunity, and antitumor activity.Recombinant mouse interleukin-21 (IL-21) produced in E.coli is a single non-glycosylated polypeptide chain containing 123 amino acids. A fully biologically active molecule, rhIL-21 has a molecular mass of 15.1 kDa analyzed by reducing SDS-PAGE and is obtained by chromatographic techniques at GenScript.