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. 2023 Jun 3;56:29. doi: 10.1186/s40659-023-00435-4

Fig. 1.

Fig. 1

Identification of iPSCs. A Growth of iPSCs in serum-free, feeder layer-free cell culture medium under phase contrast microscopy. B Karyotype analysis of iPSCs. C Immunofluorescence staining showing that iPSCs expressed pluripotent stem cell markers Oct4, SSEA4, Sox2, TRA-1-81. D iPSCs grew as spherical embryos during spontaneous differentiation in suspension culture under phase contrast microscopy. E Immunofluorescence staining showing that iPSCs spontaneously differentiated into three germ layers, with FOXA2 in the endoderm, TBX1 in the mesoderm, and Nestin in the ectoderm. Scale bar = 100 μm