1. Loss of p53 function through mutation in the p53 gene or other genomic alterations occurs in about half of all cancer cases: Greenblatt, M. S.; Bennett, W. P.; Hollstein, M.; Harris, C. C. Mutations in the p53 Tumor Suppresor Gene: Clues to Cancer Etiology and Molecular Pathogenesis.Cancer Res.1994,54, 4855−4878.