As shown in Figure 1a, following cell fixation and permeabilization, Ddx4 was revealed by flow cytometry at high cytoplasmic levels in almost the entire A2780 cell population (96.2%), while a variable expression of the antigen was found by immunohistochemistry (IHC) in patient-derived tumor samples (Figure 1b). The gene discussed is DDX4; the disease is neoplasm.