The DExD/H box protein family includes a large number of
proteins that have functional roles in kinds of RNA metabolic processes,
including modulation of complex RNA structures, association/
dissociation of some ribonucleoprotein complexes by the RNA
helicase activity, regulation of some virus life cycles [8]. DDX20 was
shown to be associated with the nuclear proteins of Epstein-Barr
virus and may play a role in the transcriptional regulation of
latent viral genes [9].