Fig. 1

Detection of BKV large T-antigen expression by direct immunofluorescence assay. a, c sections of the prostate cancer tissue show a positive IF reaction 10X magnification. d prostate cancer section shows a positive IF reaction by 40X magnification. b section from PCa patient shows a negative IF reaction 10X magnification. e section from BPH patient shows a positive reaction 10X magnification. f section from BPH patient shows a negative IF reaction 10X magnification