Fig. 2

a Cell growth analyses by counting. b Metabolic activity analyses of native CT1258 and transfected cell lines. Significantly increased metabolic activity was determined in CT1258-mKate2C cells after 48 h and 72 h cultivation compared with native CT1258 cells. The Student’s t-test were performed and *p < 0.05 was assigned as significantly different. c Real-time quantitative RT-PCR was used to measure stem cell marker gene expression levels in native CT1258 and fluorescent cell lines. In CT1258-mKate2C, CT1258-FusionRed and CT1258-TurboFP650 cells, slightly increased or decreased expressions of stem cell marker gene were observed in comparison to native CT1258 cells. No significant difference was determined