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The products of the two major suppressor genes p53 and Rb interact with the oncogene products of the DNA tumour viruses. These viral-host protein interactions mimic and interfere with the normal interactions of p53 and Rb with host proteins. The Rb gene product is frequently mutated in human cancers such that it no longer binds to viral or host proteins. In contrast we find that this is not the case with p53 as some, but not all, mutant p53 proteins still bind to the SV40 T antigen. In particular the hot spot mutation found in most Chinese and African cases of hepatocellular carcinoma (HCC) retains T binding activity. The simple subdivision of different p53 mutations revealed by this analysis may have diagnostic and prognostic consequences.
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D P Lane
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J Bártek, and
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J Bártek, and
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J Bártek, and
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