IL-35 protein plays a key role in immune regulation, forming IL-12 cytokine with IL12B or IL-35 cytokine with EBI3/IL27B. IL-12 modulates T cell and natural killer cell responses and induces interferon gamma production. IL-35 Protein, Human (HEK293, Fc) is a recombinant protein dimer complex containing human-derived IL-35 protein, expressed by HEK293 , with C-hFc labeled tag. IL-35 Protein, Human (HEK293, Fc), has molecular weight of 80-120 kDa.