Analysis of published datasets showed that the gene was more highly expressed in both pediatric and adult T-ALL patients whose leukemic cells had an immature/ETP-ALL phenotype (Fig. 1 C; P = 0.006 and P = 0.001, respectively), at a stage when JDP2 is not normally expressed (Gutierrez et al., 2010; Van Vlierberghe et al., 2013). The gene discussed is JDP2; the disease is acute lymphoblastic leukemia.