Notably, similar to tumor cells from diseased BCR-ABL transduced Cebpa−/− mice, the human erythroleukemia cell line K562 (established from a patient with CML in blast crisis) also expresses BCR-ABL and GATA1 and lacks C/EBPα. This evidence concerns the gene CEBPA and chronic myelogenous leukemia, BCR-ABL1 positive.