When the stem cell populations (CD34+CD38-) from the MEG-01 cell line and from one CML primary sample (lin-CD34+CD38-) were tracked, more cell divisions were observed in the fraction attached to the endothelial layer in relation to non-adherent cells (Figure 3a,d). The gene discussed is CD38; the disease is chronic myelogenous leukemia, BCR-ABL1 positive.