MTUS1 and breast carcinoma: In previous studies, wide tissue distribution of MTUS1 mRNA was reported by quantitative RT-PCR and some new studies examined the down-regulation of MTUS1 in tumors such as ovarian cancer, pancreatic carcinoma or breast cancer, but to date nothing is known about the localisation of MTUS1 within these tissues (3,5,13,14,27).