ABL1 and chronic myelogenous leukemia, BCR-ABL1 positive: In view of the few studies published with a precise map of the insertions [7-10], we aimed to construct an accurate map of the insertions in the cell line CML-T1 [11] and 9 patients with Ph negative BCR/ABL1 positive CML using a range of FISH probes obtained from BAC clones.