Anti-DDX40 antibodies enable researchers to detect and measure the DDX40 antigen in biological samples. This target is a reported synonym of the DHX40 gene, which encodes DEAH-box helicase 40. This protein is a suspected ATP-dependent RNA helicase. The human version of DDX40 has a canonical amino acid length of 779 residues and a protein mass of 88.6 kilodaltons, although 4 isoforms have been identified. DDX40 is a member of the DEAD box helicase protein family.