DDX39B, known to RNA biologists as U2AF65-Associated Protein 56 KDa (UAP56), plays roles in RNA splicing and nucleocytoplasmic transport (Shen, 2009), but was first discovered by immunologists, who named it HLA-B Associated Transcript 1 (BAT1) (Spies et al., 1989) and linked it to autoimmune diseases (Degli-Esposti et al., 1992). The gene discussed is DDX39B; the disease is autoimmune disease.