BCR and chronic myelogenous leukemia, BCR-ABL1 positive: Within BCR–ABL-positive (KuOr+) BM cells from moribund Evi1-reporter CML-CP mice (3-4 weeks after transplantation), the flow cytometry (FCM) analysis showed that immature (Gr-1-negative) CML cells have a higher GFP-positive rate than mature (Gr-1-positive) CML cells.