Immunohistochemical analysis of dUTPase in human breast adenocarcinoma. Immunohistochemical analysis of dUTPase in human breast adenocarcinoma. Formalin-fixed, paraffin-embedded breast cancer tumor specimens were routinely processed and stained using the DUT415 monoclonal antibody. A, low dUTPase expression. B and C, elevated nuclear and cytoplasmic expression. Magnification, ×20 (A and B) and ×40 (C). Peter M. Wilson et al. Mol Cancer Ther 2008;7:3029-3037 ©2008 by American Association for Cancer Research