Fig. 1From: Endothelial progenitor cells promote osteogenic differentiation in co-cultured with mesenchymal stem cells via the MAPK-dependent pathwayPhenotype identification of MSCs. a Flow cytometry analysis for MSCs. Cells were stained positive for MSCs surface markers CD44 and CD90 and negative for CD31 and CD34. b FITC labeled CD44 fluorescence staining of MSCs cultured for 10 days (scale bar = 50 μm). c DAPI nuclear staining (blue). d Overlay of CD44 and DAPI staining. e FITC labeled CD90 fluorescence staining of MSCs. f DAPI nuclear staining (blue). g Overlay of CD90 and DAPI stainingBack to article page