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Alternation of chromosome replication and segregation is essential for successful completion of the cell cycle and it requires an oscillation of Cdk1 (cyclin-dependent kinase 1)-CycB (cyclin B) activity. In the present review, we illustrate the essential features of checkpoint controlled and uncontrolled cell-cycle oscillations by using mechanical metaphors. Despite variations in the molecular details of the oscillatory mechanism, the underlying network motifs responsible for the oscillations are always well-conserved. The checkpoint-controlled cell cycles are always driven by a negative-feedback loop amplified by double-negative feedbacks (antagonism).

Original publication

DOI

10.1042/BST0381242

Type

Journal article

Journal

Biochem Soc Trans

Publication Date

10/2010

Volume

38

Pages

1242 - 1246

Keywords

Animals, CDC2 Protein Kinase, Cell Cycle, Cell Cycle Proteins, Cyclin B, Feedback, Physiological, Humans