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Cell. 1988 Aug 12;54(4):505-13.

Time of replication of yeast centromeres and telomeres.

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Department of Genetics, University of Washington, Seattle 98195.


The time of replication of centromeres and telomeres of the yeast S. cerevisiae was determined by performing Meselson-Stahl experiments with synchronized cells. The nine centromeres examined become hybrid in density early in S phase, eliminating the possibility that a delay in the replication of centromeres until mitosis is responsible for sister chromatid adherence and proper chromosome segregation at anaphase. The conserved sequence element Y', present at most telomeres, replicates late in S phase, as do the unique sequences adjacent to five specific telomeres. The early and late replication times of these structural elements may be either essential for their proper function or a consequence of some architectural feature of the chromosome.

[Indexed for MEDLINE]

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