Figure 1.
Figure 1. ES cell differentiation into endothelial cells. ES cells gave rise to colonies on the OP9 feeder cell layer in the absence of LIF. Expression of Flk1 and PECAM-1 was detected in R1 ES cells by immunostaining or in Flk1+/lacZ ES cells by X-gal staining. The expression pattern of PECAM-1 and Flk1 were similar at day 5. Scale bar, 100 μm.

ES cell differentiation into endothelial cells. ES cells gave rise to colonies on the OP9 feeder cell layer in the absence of LIF. Expression of Flk1 and PECAM-1 was detected in R1 ES cells by immunostaining or in Flk1+/lacZ ES cells by X-gal staining. The expression pattern of PECAM-1 and Flk1 were similar at day 5. Scale bar, 100 μm.

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