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. 1998 Nov 20;282(5393):1497-501.
doi: 10.1126/science.282.5393.1497.

Requirement for p53 and p21 to sustain G2 arrest after DNA damage (VSports)

F Bunz  1 , A Dutriaux, C Lengauer, T Waldman, S Zhou, J P Brown, J M Sedivy, K W Kinzler, B Vogelstein
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V体育平台登录 - Requirement for p53 and p21 to sustain G2 arrest after DNA damage

F Bunz et al. Science. .

Abstract

After DNA damage, many cells appear to enter a sustained arrest in the G2 phase of the cell cycle VSports手机版. It is shown here that this arrest could be sustained only when p53 was present in the cell and capable of transcriptionally activating the cyclin-dependent kinase inhibitor p21. After disruption of either the p53 or the p21 gene, gamma radiated cells progressed into mitosis and exhibited a G2 DNA content only because of a failure of cytokinesis. Thus, p53 and p21 appear to be essential for maintaining the G2 checkpoint in human cells. .

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