IL-21, human recombinant
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. Recombinant Human IL-21 is a single, non-glycosilated polypeptide chain.
Peptides & proteins
at -20°C
at least 12 months
NAME: Interleukin-21; ACCESSION/UNIPROT#: Q9HBE4; EXPRESSION SYSTEM: E.coli; FORMAT: Lyophilized from a sterile (0.2 micron) filtered aqueous solution containing 10 mM sodium phosphate, pH 7.5. Reconstitute in sterile water at 0.1 mg/mL.; TESTING: ANBL- cell proliferation with an acceptance criteria of 2 ng/mL (ED50), 5.0 x 10^5 units/mg.; #AA: 132; SEQUENCE: MLKTLNLGSC VIATNLQEIR NGFSEIRGSV QAKDGNIDIR ILRRTESLQD TKPANRCCLL RHLLRLYLDR VFKNYQTPDH YTLRKISSLA NSFLTIKKDL RLCHAHMTCH CGEEAMKKYS QILSHFEKLE PQAAVVKALG ELDILLQWME ETE