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jcb_24431_sm_SupplFig1.tif9940KSupplementary Figure 1. FACS analysis of GEF signal. J1 mESCs were used as a negative control. Oct4-GFP whole testicular cells, SSCs and ES-like cells were analyzed. Note that while most ES-like cells showed high expression of GFP, fraction of ES-like cells underwent differentiation in standard ES culture condition, thereby displaying weaker GFP intensity.

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