Description: The monoclonal antibody DNT27 reacts with mouse Epstein-Barr Virus-induced gene 3 (EBI3). EBI3 is a 34 kDa soluble protein first identified in B cells that is upregulated after Epstein-Barr virus infection. EBI3 can exist as a homodimer and also heterodimerizes with IL-27α (p28, IL-30) to form the cytokine IL-27. IL-27 is produced most abundantly by dendritic cells and macrophages with some recent reports of expression in NKT cells. Recently, a complex of EBI3 and the p35 subunit of IL-12, called IL-35, has been reported to be produced by regulatory T cells.