SLC7A5 and breast cancer: Moreover, Ansari111 utilized Western blot to analyse the level of proteins in BC and found that 191 from 1110 (17%) in the discovery set and 268 from 1554 (17%) in validation sets of cases had positive SLC7A5 expression (>15 H‐score), while 1019 in 1923 (53%) from metastatic BC cases had high mRNA expression (log2 intensity > 8).