Interleukin 21 (IL21)
  • Interleukin 21 (IL-21), is a cytokine that has potent regulatory effects on cells of the immune system, including natural killer (NK) cells and cytotoxic T cells that can destroy virally infected or cancerous cells. This cytokine induces cell division/proliferation in its target cells. IL-21 elicits its effects on immune cells by interacting with a cell surface receptor known as the interleukin 21 receptor, IL-21R, that is expressed in bone marrow cells and various lymphocytes.

  • IL-21 is expressed in activated human CD4+ T cells but not in most other tissues. In addition, IL-21 expression is up-regulated in Th2 and Th17 subsets of T helper cells, as well as T follicular cells. Furthermore IL-21 is expressed in NK T cells regulating the function of these cells.

Organism species: Homo sapiens (Human)

CATALOG NO. PRODUCT NAME APPLICATIONS
Proteins RPB688Hu01 Recombinant Interleukin 21 (IL21) Positive Control; Immunogen; SDS-PAGE; WB.
RPB688Hu02 Recombinant Interleukin 21 (IL21) Positive Control; Immunogen; SDS-PAGE; WB.
APB688Hu01 Active Interleukin 21 (IL21) Cell culture; Activity Assays.
APB688Hu61 Active Interleukin 21 (IL21) Cell culture; Activity Assays.
Antibodies PAB688Hu01 Polyclonal Antibody to Interleukin 21 (IL21) WB; IHC
MAB688Hu22 Monoclonal Antibody to Interleukin 21 (IL21) WB; IHC; ICC; IP.
LAB688Hu71 Biotin-Linked Polyclonal Antibody to Interleukin 21 (IL21) WB; IHC; ICC.
LAB688Hu81 FITC-Linked Polyclonal Antibody to Interleukin 21 (IL21) WB; IHC; ICC; IF.
PAB688Hu02 Polyclonal Antibody to Interleukin 21 (IL21) WB; IHC; ICC; IP.
Assay Kits SEB688Hu ELISA Kit for Interleukin 21 (IL21) Enzyme-linked immunosorbent assay for Antigen Detection.
SCB688Hu CLIA Kit for Interleukin 21 (IL21) Chemiluminescent immunoassay for Antigen Detection.

Organism species: Mus musculus (Mouse)

CATALOG NO. PRODUCT NAME APPLICATIONS
Proteins RPB688Mu01 Recombinant Interleukin 21 (IL21) Positive Control; Immunogen; SDS-PAGE; WB.
RPB688Mu02 Recombinant Interleukin 21 (IL21) Positive Control; Immunogen; SDS-PAGE; WB.
Antibodies PAB688Mu01 Polyclonal Antibody to Interleukin 21 (IL21) WB; IHC; ICC; IP.
PAB688Mu02 Polyclonal Antibody to Interleukin 21 (IL21) WB; IHC; ICC; IP.
Assay Kits SEB688Mu ELISA Kit for Interleukin 21 (IL21) Enzyme-linked immunosorbent assay for Antigen Detection.
SCB688Mu CLIA Kit for Interleukin 21 (IL21) Chemiluminescent immunoassay for Antigen Detection.

Organism species: Rattus norvegicus (Rat)

CATALOG NO. PRODUCT NAME APPLICATIONS
Proteins RPB688Ra01 Recombinant Interleukin 21 (IL21) Positive Control; Immunogen; SDS-PAGE; WB.
APB688Ra61 Active Interleukin 21 (IL21) Cell culture; Activity Assays.
Antibodies PAB688Ra01 Polyclonal Antibody to Interleukin 21 (IL21) WB; IHC; ICC; IP.
MAB688Ra21 Monoclonal Antibody to Interleukin 21 (IL21) WB; IHC; ICC; IP.
Assay Kits SEB688Ra ELISA Kit for Interleukin 21 (IL21) Enzyme-linked immunosorbent assay for Antigen Detection.
SCB688Ra CLIA Kit for Interleukin 21 (IL21) Chemiluminescent immunoassay for Antigen Detection.
  1. "Interleukin 21 and its receptor are involved in NK cell expansion and regulation of lymphocyte function." Nature 408:57-63(2000) [PubMed] [Europe PMC] [Abstract]
  2. "Cloning and characterization of an isoform of interleukin-21."FEBS Lett. 581:4001-4009(2007) [PubMed] [Europe PMC] [Abstract]
  3. "Generation and annotation of the DNA sequences of human chromosomes 2 and 4." Nature 434:724-731(2005) [PubMed] [Europe PMC] [Abstract]
  4. "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)."Genome Res. 14:2121-2127(2004) [PubMed] [Europe PMC] [Abstract]
  5. "IFN-alpha regulates IL-21 and IL-21R expression in human NK and T cells."J. Leukoc. Biol. 76:416-422(2004) [PubMed] [Europe PMC] [Abstract]
  6. "Interleukin-21 is a T-helper cytokine that regulates humoral immunity and cell-mediated anti-tumour responses."Immunology 112:177-182(2004) [PubMed] [Europe PMC] [Abstract]
  7. "The existence of multiple conformers of interleukin-21 directs engineering of a superpotent analogue."J. Biol. Chem. 282:23326-23336(2007) [PubMed] [Europe PMC] [Abstract]
  8. "Crystal structure of interleukin-21 receptor (IL-21R) bound to IL-21 reveals that sugar chain interacting with WSXWS motif is integral part of IL-21R."J. Biol. Chem. 287:9454-9460(2012) [PubMed] [Europe PMC] [Abstract]
  9. "Early-onset inflammatory bowel disease and common variable immunodeficiency-like disease caused by IL-21 deficiency."J. Allergy Clin. Immunol. 133:1651-1660(2014) [PubMed] [Europe PMC] [Abstract]