Fig. 2From: Serum starvation-induced cell cycle synchronization stimulated mouse rDNA transcription reactivation during somatic cell reprogramming into iPSCsQ-PCR analysis of rDNA-related gene expression during the a MEF and b S-MEF cell reprogramming process. Bars represent relative levels of rDNA-related genes normalized to Gapdh mRNA. Expression level of MEFs was set as 1. Significant differences at *p < 0.05 and **p < 0.01, n = 3. D day, ESC embryonic stem cell, MEF mouse embryonic fibroblast, UBF upstream binding factor, TIF-IA transcription initiation factor IA, RPI​ RNA polymerase I Back to article page