ARID4B and leukemia: Comparison of transcriptional levels of patient samples diagnosed with either KMT2A-r ALL or KMT2A-w ALL, as well as healthy bone marrow samples, retrieved from previously performed expression arrays [12], also revealed no differences in expression between leukemia types, although the overall expression of ARID4B in pediatric ALL was significantly higher than in healthy bone marrow cells (Figure 3J).