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Proc Natl Acad Sci U S A. 1991 Dec 1;88(23):10735-9.

Identification of a gene, MLL, that spans the breakpoint in 11q23 translocations associated with human leukemias.

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Department of Molecular Genetics and Cell Biology, University of Chicago, IL 60637.

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  • Proc Natl Acad Sci U S A 1992 May 1;89(9):4220.


Recurring chromosomal translocations involving chromosome 11, band q23, have been observed in acute lymphoid leukemias and especially in acute myeloid leukemias. We recently showed that breakpoints in four 11q23 translocations, t(4;11)(q21;q23), t(6;11)(q27;q23), t(9;11)(p22;q23), and t(11;19)(q23;p13.3), were contained within a yeast artificial chromosome clone bearing the CD3D and CD3G gene loci. We have identified within the CD3 yeast artificial chromosome a transcription unit that spans the breakpoint junctions of the 4;11, 9;11, and 11;19 translocations, and we describe two other, related transcripts that are upregulated in the RS4;11 cell line. We have named this gene MLL (myeloid/lymphoid, or mixed-lineage, leukemia.

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