Immunogen sequence: SKIKLLHTDT LLKIESKKHK AYLRSAAIEE ERESEFALRP TFDLTVRRNH LIEDVLNQLS QFENEDLRKE LWVSFSGEIG YDLGGVKKEF FYCLFA Highest antigen sequence identity to the following orthologs: Mouse - 44%, Rat - 43%. HERC5 (E3 ISG15 - protein ligase HERC5) is