1. Gislene Pereira is in the School of Biological Sciences, University of Manchester, Oxford Road, Manchester, M13 9PT, UK. e-mail: gpereira@picr.man.ac.uk
2. Elmar Schiebel is in the Paterson Institute for Cancer Research, Wilmslow Road, Manchester, M20 4BX, UK. e-mail: eschiebel@picr.man.ac.uk

Abstract

Sister chromatid segregation in anaphase of mitosis is initiated through cleavage of cohesin by the protease separase. Two studies now show that this view is valid for most chromosomal DNA, but not for the highly repetitive ribosomal DNA (rDNA) and telomeres. The disjunction of these regions of the chromosome occurs in mid-anaphase, long after cohesin cleavage, and is regulated by the conserved phosphatase Cdc14.

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