TP53 and breast carcinoma: Many of these biomarkers, including mucins, oncofetal proteins such as carcinoembryonic antigen (CEA), oncoproteins such as receptor tyrosine-protein kinase cellular tumor antigen (p53), and cytokeratins such as tissue polypeptide antigen (TPA) and tissue polypeptide specific antigen (TPS), have been recommended for breast cancer.