Interleukin 2 (IL-2) is an immunomodulatory cytokine that is produced by lymphocytes. IL-2 signals through the IL-2R receptor to induce activated T cell proliferation and promote T cell differentiation. IL-2 also stimulates the proliferation and differentiation of B cells, natural killer cells, monocytes, and macrophages.
Bioactivity Assay:CTLL-2 cell proliferation; ED50 =5 ng/mL; Bioactivity =2.0 x 10^5 units/mg