Choi and Kim [47] investigated the antiproliferative activity of the isoflavones daidzein and genistein of common beans [48] in three breast cancer cell lines with different patterns of estrogen receptor (ER) and c-erbB-2 protein expression (ERα‐positive MCF-7 cells, c-erbB-2-positive SK-BR-3 cells and ERα/c-erbB-2-positive ZR-75-1). This evidence concerns the gene ESR1 and breast carcinoma.