Interferon γ and Interleukin 2: ELISA-VIDITEST Interferon γ is intended for the quantitative detection of Interferon γ (IFNγ) in samples. ELISA-VIDITEST IL-2 is intended for the quantitative detection of Interleukin 2 (IL-2) in samples. IFNγ is a dimerized soluble cytokine, which is important in innate and adaptive immunity against viral, bacterial and protozoal pathogens. IFNγ is predominantly produced by natural killer cells (innate immunity response) and CD4+ and CD8+ lymphocyte (once the antigen-specificic immunity develps). IL-2 is a key signal molecule in adaptive immune response which is important for priming of immune response, T-cell expansion and differentiation. It is produced mainly by activated dendritic cells as T-lymphocytes.