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Mutations in the TP53 tumor-suppressor gene in human cancer are unique in that 60% to 70% are of the missense variety, resulting in a full-length protein that is often highly expressed in patients' tumors. These missense mutant proteins often exhibit pro-oncogenic activities (referred to as gain of function) in mouse models and human cell lines and correlate with poor cancer prognosis in some cases.
Lozano et al. (Sun,) studied this question.