Abstract:
:During mammalian development, one of the two X chromosomes in female embryos is randomly inactivated in the somatic cell in order to achieve gene dosage compensation. But is X inactivation established simultaneously or is it accomplished over time in a lineage-dependent fashion? We have examined this question in mouse embryos carrying an X-linked lacZ transgene. This transgene is subject to inactivation and the loss of beta-galactosidase activity provides a direct indication of X inactivation in individual cells. We find that X inactivation proceeds with different schedules in different somatic tissues, and the notochord, the heart, cranial mesoderm and the hindgut are among the last tissues to undergo X inactivation.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Tan SS,Williams EA,Tam PPdoi
10.1038/ng0293-170subject
Has Abstractpub_date
1993-02-01 00:00:00pages
170-4issue
2eissn
1061-4036issn
1546-1718journal_volume
3pub_type
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