For this we used two sister-cell lines derived from a mouse adenocarcinoma model in BALB/c [46] with different MAGI1 expression levels (Figure S2a) and metastatic capacities: 67NR (ER+) being non-metastatic and 4T1 (ER−), highly metastatic [47]. The gene discussed is ESR1; the disease is adenocarcinoma.