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Undifferentiated human induced pluripotent stem cells (hiPSCs). Phase‐contrast images of hiPSC colonies (A) immediately after seeding and (B) after 4 days of culturing on SNL feeder cells. Immunocytochemical images of hiPSC colonies stained for (C) SSEA‐4 (green) and (D) alkaline phosphatase (red). Blue, nuclei. Scale bars, 100 μm.
