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. 1995 Jun 16;81(6):867-77.
doi: 10.1016/0092-8674(95)90007-1.

Expression of msl-2 causes assembly of dosage compensation regulators on the X chromosomes and female lethality in Drosophila

R L Kelley  1 , I Solovyeva, L M Lyman, R Richman, V Solovyev, M I Kuroda
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Expression of msl-2 causes assembly of dosage compensation regulators on the X chromosomes and female lethality in Drosophila

R L Kelley et al. Cell. .
Free article

Abstract

Male-specific lethal-2 (msl-2) is a RING finger protein that is required for X chromosome dosage compensation in Drosophila males. Consistent with the formation of a dosage compensation protein complex, msl-2 colocalizes with the other MSL proteins on the male X chromosome and coimmunoprecipitates with msl-1 from male larval extracts. Ectopic expression of msl-2 in females results in the appearance of the other MSL dosage compensation regulators on the female X chromosomes and decreased female viability. We suggest that msl-2 RNA is the primary target of SxI regulation in the dosage compensation pathway and present a speculative model for the regulation of two distinct modes of dosage compensation by SxI.

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