The TP53 mutational status of the four breast cancer cell lines (MDA-MB-231, BT549, MCF7 and T47D) was gathered from Leroy et al. (2014), with MDA-MB-231 exhibiting a mutation at nucleotide position c.839G > A, resulting in an amino acid substitution at p. R280K. This evidence concerns the gene TP53 and breast cancer.