Fig. 4

Analysis of phenotype, drug sensitivity, mycoplasma contamination, and radiation sensitivity. a Protein expressing patterns of ZJU-0327, ZJU-0725, and ZJU-1127 cells were more similar to those of the basal-like phenotype group than the normal and luminal phenotype groups and HER2 over expression, as determined by western blotting. b Absence of mycoplasma contamination in the negative control sample and ZJU-0327, ZJU-0725, and ZJU-1127 cell lines, as determined by PCR. c ZJU-0725 and Sk-Br₃ but no but ZJU-1127 were sensitive to radiation (different X-ray doses for 72 h), d cyclophosphamide, carboplatin, 5-FU, and paclitaxel showed slight inhibition of ZJU-0725 growth but had no effect on ZJU-1127