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HEXIM1 interacts with p53. MCF7 cells were treated with or without UV radiation. Lysates of the cells were analyzed by IPs using the antibodies against HEXIM1 (A) and p53 (B), followed by Western blotting to examine the interactions between endogenous HEXIM1 and p53. Associations between endogenous HEXIM1/CDK9 (A) and p53/CDK9 (B) proteins were also examined.
