GATA3 and breast cancer: Several of the genes are breast cancer related, including growth regulation by estrogen in breast cancer 1 gene (GREB1) that is reported to be highly expressed in hormone responsive tissues in cancer [28-30], the transcription factor GATA3, known to play a role in luminal breast cell differentiation and is implicated in breast cancer progression [31-33], and SLC7A2 a less well described cationic amino acid transporter known to exhibit moderate to low levels of protein expression in breast cancer with no expression observed in normal breast epithelium [34].