Immunogen sequence: GSIPTSCCFI MTSKKIPNTL LKSYKRITNN RCTLKAIVFK TRLGKEICAD PKKKWVQDAT KHLDQKLQTP KP. This gene is one of several Cys-Cys (CC) cytokine genes clustered on the q-arm of chromosome 17. Cytokines are a family of secreted proteins involved in