The slide shows the cellular stress response leading to growth arrest as explained by the induction of the universal cell cycle inhibitor p21(WAF1) by the tumor suppressor p53.
1. G1
M
S
G2
R
p53
Direct p21 transcription
Inactive CDK
T
P
T-loop
ATP
161
14
CDK
PSTAIRE
NH2
T
Y
15
p21
G1 Arrest
Cell cycle arrest mediated by p53 target p21 (WAF1)
DNA damage
El-Deiry et al., Cell 75:817, 1993
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