Fig. 4From: Untargeted metabolomic analysis of ischemic injury in human umbilical vein endothelial cells reveals the involvement of arginine metabolismSignificant changes in various types of metabolites were identified by comparing the differentially expressed metabolites between the glucose and oxygen deprivation treatment groups at different times in heatmaps. A The NC group and the 3-h OGD treatment group. B The 3-h OGD treatment group and the 6-h OGD treatment group. C The 6-h OGD treatment group and the 9-h OGD treatment group. D The 3-h OGD treatment group and the 9-h OGD treatment group. E The NC group and the 6-h OGD treatment group. F The NC group and the 9-h OGD treatment group. In the pairwise comparison, only the top 25 differentially up- and down-regulated metabolites were selected for heatmaps to observe the distribution of metabolite typesBack to article page