Human embryonic stem cells are propagated on synthetic substrates. The cells are stained with human pluripotent stem cell markers (Nanog, Tra-1-60, OCT4-GFP, and SSEA4).

Image courtesy of Y. Mei, K. Saha, R. Langer, R. Jaenisch, and D.G. Anderson

Human embryonic stem cells are propagated on synthetic substrates. The cells are stained with human pluripotent stem cell markers (Nanog, Tra-1-60, OCT4-GFP, and SSEA4). Image courtesy of Y. Mei, K. Saha, R. Langer, R. Jaenisch, and D.G. Anderson