Gene expression analysis of eGFP+ cells sorted from E9.5 embryos. eGFP+ and eGFP−, as well as unsorted control cells were isolated and analyzed for expression of Egfl7, eGFP (a), Flk1, VE-Cadherin, CD31, and NG2 transcripts (b). Graph contains data from three independent sorting experiments. Error bars represent SEM.