Fig. 2From: Significant improvement of direct reprogramming efficacy of fibroblasts into progenitor endothelial cells by ETV2 and hypoxiaExpression of CD31. HFs did not express the CD31 marker (a–d). Some cells expressed CD31 in normoxia conditions and transduction with ETV2 (e–h) and in transduction with ETV2 and hypoxia conditions (i–l). Almost all HUVECs expressed CD31 (m–p). HUVEC human umbilical vein endothelial cellBack to article page