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IFN-gamma, the only member of type II interferon, is a soluble dimer cytokine secreted mainly by natural killer cells （NK） and natural killer T cells （NKT） when it functions in innate immunity. During antigen-specific immunity it is secreted by CD4 Th1 and CD8 cytotoxic T cells.IFN-gamma acts on the whole process of tumorigenesis and development, and its anti-tumor mechanism is mainly divided into immune mechanism and non-immune mechanism.IFN-gamma can directly inhibit tumor cell proliferation, promote tumor cell apoptosis, inhibit tumor angiogenesis, and cooperate with NK, NKT, γδT cells and CD4+/CD8+T cells of innate and adaptive immunity to complete tumor killing. In addition, IFN-gamma also has an important immunomodulatory function, which can improve the lysosomal activity of macrophages, and has an anti-proliferation effect on transformed cells.This product is the recombinant human Renin protein expressed from human 293 cells （HEK293）.