The genes activated through the described mechanism are known as IFN signature and comprise genes such as MXA and MXB associated with antiviral response (33, 34); IFIT1 and IFIT2 linked to posttranscriptional regulation in viral infections (35); ISG15 and 55 as part of the proteasomal degradation machinery (36); LY6E and RSAD2 are involved in metabolism and proliferation regulation of B cells (37); also, EPSTRI1, IFI44L, and IFI35 (38) are thought to participate in IFN signature response modulation. This evidence concerns the gene MX2 and viral infectious disease.