SOX11 and breast cancer: Two mammary tumour cell lines derived from Brca1f/f/p53±/BLG-Cre mammary tumours (Molyneux et al., 2010), Brca1.3 and Brca1.1516, express low levels of Sox11 in comparison to C2C12, an immortalised mouse myoblast cell line (Fig. S1B).