RNA-Seq was carried out on total RNA extracted from MCF7 human breast cancer (ER+, PR+, HER2−) cells cultured in normoxia (21% O2, 24 h), acute (1% O2, 4 h) and chronic hypoxia (1% O2, 24 h) for n = 1 replicate. Here, ERBB2 is linked to breast cancer.