TOX3mRNA is expressed in multiple molecular subtypes of breast cancer. A. Expression of TOX3 was determined by qRT-PCR in breast cancer (red) and normal breast (blue) samples, relative to housekeeping gene MRPL. Relative expression was then normalized to ‘Normal 1’. B. RT-PCR analysis of the long (Var1) and short (Var2) variants of TOX3, and GAPDH, in breast cancer cell lines (BT474, MCF-7), two normal breast samples, and two primary breast cancer samples BC6 and BC1, as in (A). C. Relative TOX3 mRNA expression in six intrinsic molecular subtypes of breast cancer.