To assess the effect of activation of p53 and its ability to sensitize other agents in eliminating quiescent CD34+ CML cells, mononuclear cells from BC CML patient samples (#1-8a, Table 1) were stained with the cell division tracking dye CFSE and then co-cultured with human BM derived MSCs. The gene discussed is TP53; the disease is chronic myelogenous leukemia, BCR-ABL1 positive.