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The article discusses research done on the sufficiency of cohesion cleavage and Cdk1 down-regulation in driving formation of nuclei in arrested cells. The separation of DNA molecules at mitosis encompasses traction to poles using microtubules. Chemical cross-linking experiments consistent with the tripartite ring model are described. The article also mentions the establishment of tension to strengthen kinetochore microtubules.

Reports that the appearance of CLN1 and CLN2 RNAs depends on an active CDC28 kinase and is stimulated by CLN3 activity. Proposes that CDC28 kinase activity due to CLN1 and CLN2 proteins arises through a positive feedback loop which allows CLN proteins to promote their own synthesis.

The article presents two studies, one of which shows that phosphorylation of the cohesin subunit SA2, presumably by Plk1, is required for cohesin removal from chromosome arms in early mitosis, while data from another study suggests that a protein called shugoshin protects centromeric SA2 from such phosphorylation. Cohesin is composed of multiple subunits, each of which can be phosphorylated at multiple threonine or serine amino acid residues. The studies were conducted by researcher Michael Peters and colleagues and researcher Kim Nasmyth and colleagues, respectively.