Immunogen sequence: PSFTQSQYSF TIAEDTAIGS TVDTLRILPS QNVWFSTVNG ERPENNKGGV FVIEQETGTI KLDKRLDRET SPAFHFKVAA TIPLDKVDIV FTVDV Antigen sequence identity: Mouse 88%; Rat 88%. FAT1, FAT2, FAT3 and FAT4 are human homologs of Drosophila Fat, which is involved