Immunogen sequence: VSEPTTVAFD VRPGGVVHSF SHNVGPGDKY TCMFTYASQG GTNEQWQMSL GTSEDHQHFT CTIWRPQGKS Y Highest antigen sequence identity to the following orthologs: Mouse - 90%, Rat - 87%. The interleukins are a broad family of well characterized cytokines,