fru fruC sat fry fty fruity CT22773 ms(3)06411 cg7689 BtbVI cg7688 CG7690 FruM FRU BTB-protein-VI Fru satori fru-satori Dmfru Fruitless BTB-VI CG7688 FRU-PI CG7689 fruitless CG14307 gene