Human IL‑2 PE‑conjugated Antibody

IL-2 is a 15-19 kDa secreted O-glycosylated polypeptide that belongs to the gamma _c -receptor utilizing family of molecules. It is a monomer that is expressed by a limited number of cell types, including CD4⁺ and CD8⁺ T cells, gamma delta T cells, eosinophils and B cells. Its local concentration, plus the stoichiometry of it receptor ( a two or three subunit complex) appears to determine what effects it has on its target cells. It is suggested to both induce NK and CD8⁺ T cell proliferation, and promote NK cell and CD8⁺ T cell effector activity. IL-2 also appears to drive CD4⁺ Fox P3^- thymocytes into mature FoxP3⁺ Tregs, and to direct the conversion of CD4⁺ T cells into induced Tregs. Finally, IL-2 induces gamma delta T cells to secrete IFN-gamma, and endothelial cells to upregulate endocytic activity. Human and mouse IL-2 share 56 % amino acid sequence identity.