Representative hematoxylin and eosin stained sections of liver from mice transplanted with normal WBM alone (A), fixed numbers of MLL-AF9 cells (4 ×105) mixed with 1 or 50 million WBM cells (panels B and C), purified LSK cells alone (D), or fixed numbers of MLL-AF9 mixed with 10,000 (E) or 50,000 (F) LSK cells. Magnification 100X. Animals were euthanized on day 8 for WBM and day 7 for LSK.