How dominant-negative mutations caused p53 to also be identified as an oncogene,”most p53 mutations eliminate DNA binding and destabilize the protein (mutant protein is functionally “”invisible””)BUT since p53 functions as a tetramer, some mutations that eliminate p53 function (transactivation), also inactivate tetramers containing only 1 mutant subunitIf cells contain equivalent amounts of wild-type and d-n mutant forms of p53 protein

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