NR0B1 and Ewing sarcoma: Ewing's sarcoma‐derived A‐673 and TC‐71 cells and human pancreas adenocarcinoma‐derived AsPC‐1 cells as a control, in which DAX1 protein was not detected in Western blotting (data not shown), were treated with K‐234 at various concentrations, and cell viability was determined (Figure 2A).