CD34 and acute myeloid leukemia: Notably and in concert with the function of MUC1‐C in stabilizing β‐catenin,12 we found that targeting MUC1‐C with GO‐203 in CD34+ AML cells is associated with marked down‐regulation of active β‐catenin as determined by flow cytometry (Figure 3C) and immunoblotting (Figure 3D).