Purity > 90% as determined by SDS-PAGE. MW: 18.9kDa. Full Length of Mature Protein: 24-166a. N-terminal 6xHis-tagged. Ovis aries (Sheep). Produced by lymphocytes activated by specific antigens or mitogens. IFN-gamma, in addition to having antiviral activity, has important immunoregulatory functions. It is a potent activator of macrophages, it has antiproliferative effects on transformed cells and it can potentiate the antiviral and antitumor effects of the type I interferons.