ABL1 and chronic myelogenous leukemia, BCR-ABL1 positive: Although previous mouse studies have found that forced retroviral expression of BCR-ABL in hematopoietic progenitors generated from pluripotent embryonic stem cells endowed them with engraftment potential (Perlingeiro et al., 2001), we failed to detect meaningful engraftment following transplantation of CML iPSC-derived iCD34+ cells (not shown).