SRSF3 and poliovirus infection: It was initially predicted that the deleted form of SRp20 would in fact re-localize to the cytoplasm during poliovirus-infection since the mutated protein still contains the portion of the protein required for TAP interaction and export [30], although we do not yet know the mechanism by which SRp20 re-distributes to the cytoplasm of the cells during poliovirus infection.