TP53 and neoplasm: Kim et al. [53] performed RNA sequence analysis on 8 mouse BC cell lines, namely, 2208 L (derived from a BALB/c p53-null tumor), 4T1, 67NR (BALB/c tumor), PyMT-Epi, PyMT-Mes (C57BL/6 MMTV-PyMT tumor), T11 (BALB/c p53-null tumor), AT-3 (C57BL/6 MMTV-PyMT tumor) [54] and EO771 (C57BL/6 tumor) [55, 56].