DDX39A is a member of the DEAD box protein family. This protein is characterized by the conserved motif Asp-Glu-Ala-Asp (DEAD) and are putative RNA helicases. They are implicated in a number of cellular processes involving alteration of RNA secondary structure, such as translation initiation, nuclear and mitochondrial splicing, and ribosome and spliceosome assembly. Based on their distribution patterns, some members of the DEAD box protein family are believed to be involved in embryogenesis, spermatogenesis, and cellular growth and division. Alternatively spliced transcript variants encoding different isoforms have been found. Recombinant human DDX39A protein, fused to His-tag at N-terminus, was expressed in E.coli