 The decrease of Chibby1 (CBY1) contributes to ? catenin constitutive activation associated with the presence of the BCR-ABL1 fusion gene of chronic myeloid leukemia (CML).     ///    DNA methyltransferase 1 drives transcriptional down-modulation of ? catenin antagonist Chibby1 associated with the BCR-ABL1 gene of chronic myeloid leukemia.. 