GSK3B and acute lymphoblastic leukemia: We here investigated the DNA‐binding activity of β‐catenin in two T‐ALL cell lines (RPMI8402 (pre‐T‐ALL) and Jurkat (cortical T‐ALL relapse)) with high basal levels of nuclear active β‐catenin protein that is increased in response to GSK3β inhibition by 25 mM LiCl (Fig EV1A and B).