Figure 4: Characterization of iPSCs in vivo.

(A) Teratoma formation (n = 3). Three germ layers (ectoderm, endoderm, and mesoderm) were detected in all iPSCs. Scale bar: 50 μm. (B) Genotyping of chimeras. Single iPSC clones were picked and amplified for each group. We injected 6–11 iPSCs into a 3.5 day-old blastocyst (n = 3). The GFP signals represent chimerism in multiple tissues. (C) The urogenital ridge in 13.5 day embryos was observed under fluorescence microscopy. Oct4 signals from iPSCs were detected in the urogenital ridge (n = 3).