GITR (TNFRSF18) is a member of the TNFR superfamily. GITR promotes T cell activation and proliferation and increases resistance to tumors and viral infections, and exacerbates autoimmune diseases and inflammation processes[1]. GITR Protein, Mouse (HEK293, Fc) is a recombinant protein with a C-terminal Fc label and is produced in HEK293 cells.