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. 1988 Jan 15;44(1):63-5.
doi: 10.1007/BF01960248.

Heterochromatin associated with active versus inactive centromeres of mouse replicates at different times

B K Vig  1
Affiliations

Heterochromatin associated with active versus inactive centromeres of mouse replicates at different times

B K Vig. Experientia. .

Abstract

A subline of mouse L-cells carries a dicentric chromosome in which one centromere always separates prematurely. This centromere is not involved in the dynamics of chromosome migration and is considered inactive. By use of anti-BRdU antibody binding to BRdU-treated chromosomes it is shown that the pericentric constitutive heterochromatin associated with the prematurely separating centromere replicates earlier than its counterpart associated with the active centromere and even before several euchromatic regions in the genome. These results point to a possible mechanism by which dicentric chromosomes segregate equationally.

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