Analysis by flow cytometry of fibroblast (CD13) and pluripotency (SSEA-4 and TRA-1-60) markers during reprogramming of hADFs. (A) Percentages of CD13+, SSEA-4+ and TRA-1-60+ cells on different days of reprogramming in the TRA-1-85+ population of cells. (B,C) Percentages of the cells that co-express CD13 and SSEA-4 in the (B) TRA-1-85+ population of cells and in the (C) TRA-1-60+ fraction of cells. (D) Real-time PCR analysis of mRNA levels of pluripotency markers, NANOG, OCT4, SOX2 and ZFP42 in hADFs, in the cells 6 days after transducing with hSTEMCCA lentiviruses, and the cell fractions sorted by flow cytometry based on the expression of CD13, SSEA-4 and TRA-1-60 (n=2). The fold-changes were calculated relative to expression levels in hiPSCs. Data represented as mean±s.d.