Supplementary Figure 1: Diagrams of constructs.

These constructs include episomal vectors used in MEF reprogramming experiment and PB vectors used in EPSCs transfection. CAG: CMV early enhancer/chick β-actin; SV40/pA: SV40 polyA; Orip: origin of plasmid replication; EBNA-1: EBV nuclear antigen 1; T2A, E2A: 2A peptides; bpA: bovine growth hormone polyA.