In different vertebrates, the functions of different IFITM members diverge. IFITM1, IFITM2 and IFITM3 are involved in cell adhesion [9] , antiproliferation [9] , tumor suppression [10, 11] , and germ cell and embryonic development [12] . More recently, these genes were identified as novel types of antiviral restriction factors with a wide spectrum of antiviral activity against influenza A viruses (e.g. H1N1 viruses), West Nile virus, dengue virus, filoviruses, HIV-1, HCV, venezuelan equine encephalitis virus (VEEV), chikungunya virus (CHIKV), vesicular stomatitis virus (VSV) and even SARS-coronavirus [8, [13] [14] [15] [16] [17] [18] . The main function of IFITM5 is associated with bone development in vertebrates [4, 19, 20] . IFITM6 seems to be involved in macrophage functions in tumor suppression [20] . To date, however, there is no information about the functions of IFITM7 and IFITM10.