About this item
Interleukin 21 (IL-21) is a member of the common-gamma chain family of cytokines that are involved in immunoregulation. IL-21 is normally expressed by activated CD4+ T cells and is aberrantly expressed in Hodgkin lymphoma cells. The IL-21 receptor (IL-21R) activates the JAK/STAT signaling pathway and is expressed on T, B, and natural killer (NK) cells.
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Within the B cell lineage, IL-21 is a switch factor regulating IgG1 and IgG3 antibody production. IL-21 also cooperates with IL-4 for the production of multiple antibody classes in B cells. IL-21 has pleiotropic effects on the proliferation, differentiation, and effector functions of B, T, NK, and dendritic cells.
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Specifications
- Conjugation:Unconjugated
- Protein Function:Cytokine
- Protein/Peptide Type:Recombinant
- Source:E. coli
- Species:Human
- Storage Conditions:−20 °C
- Endotoxin Content:Endotoxin LAL (EU/µg) ≤1
- Biological Activity:Bioactivity assay: B9 cell proliferation, ED50 ≤5 ng/ml, bioactivity ≥2.0×10⁵ units/mg
- Gene ID:Q9HBE4
- Reconstitution Instructions:Sterile water at 0.1 mg/ml
- Endotoxin-free:N
- Carrier-Free:Y
- Protease-free:N
- Animal-Free:N
- UniProtKB:Q9HBE4
- Protein/Peptide Name:IL-21
- Purity:≥97%
- Molecular Weight:15.4 kDa
- Sequence:MQDRHMIRMR QLIDIVDQLK NYVNDLVPEF LPAPEDVETN CEWSAFSCFQ KAQLKSANTG NNERIINVSI KKLKRKPPST NAGRRQKHRL TCPSCDSYEK KPPKEFLERF KSLLQKMIHQ HLSSRTHGSE DS
- Endotoxin Level:Low
- Formulation:10 mM sodium phosphate, pH 7.5
- Nuclease-free:N
- Grade:RUO
- Shipping Temperature:RT
- Tested Applications:Bioassay