Fig. 1

Detection of MMTV-LV sequence in breast cancer. 1.5% agarose gel electrophoresis of the GelRed-stained amplification products for MMTV-LV gene screening using a semi-nested PCR assays. A. breast cancer cell lines B. breast cancer specimens C. breast fibroadenoma tissues D. Prevalence of MMTV-like env sequence in Chinese women breast cancer specimens compared to Chinese women breast fibroadenoma tissues (based on Table 3) *Indicating the significant difference between groups for P < 0.05