Mixed Lineage Leukemia (MLL1) translocations encode fusion proteins retaining the N terminus of MLL1, which interacts with the tumor suppressor, menin. This interaction is essential for leukemogenesis and thus is a promising drug target. However, wild-type MLL1 plays a critical role in sustaining hematopoietic stem cells (HSCs); therefore, disruption of an essential MLL1 cofactor would be expected to obliterate normal hematopoiesis. Here we show that rather than working together as a complex,...Expand abstract
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Distinct pathways regulated by menin and by MLL1 in hematopoietic stem cells and developing B cells.
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