MEF2C and acute lymphoblastic leukemia: Quantification of MEF2C expression levels in primary hematopoietic cell/tissue samples in comparison to T-ALL cell line LOUCY showed vanishingly low expression in T-cells, contrastingly high levels in B-cells and aberrant activity in T-ALL (Figure 1A), endorsing these cell lines as suitable models for analyzing MEF2C deregulation in T-ALL.