Tumor protein p63, typically referred to as p63, also known as transformation-related protein 63, is a protein that in humans is encoded by the TP63 (also known as the p63) gene.[5][6][7][8]
The TP63 gene was discovered 20 years after the discovery of the p53 tumor suppressor gene and along with p73 constitutes the p53 gene family based on their structural similarity.[9] Despite being discovered significantly later than p53, phylogenetic analysis of p53, p63 and p73, suggest that p63 was the original member of the family from which p53 and p73 evolved.[10]