SLC39A6 and breast cancer: LIV1 (SLC39A6: solute carrier family 39 zinc transporter member 6), a breast-cancer-associated zinc transporter protein, is a downstream target of STAT3 that is essential and sufficient for the cell-autonomous role of STAT3 in the epithelial-mesenchymal transition (EMT) of zebrafish gastrula organizer cells [20].