Fig. 3From: Untargeted metabolomic analysis of ischemic injury in human umbilical vein endothelial cells reveals the involvement of arginine metabolismMultivariate statistical analyses of HUVECs treated with OGD at different times based on UHPLC-QTPF/MS data. A PCA of each treatment group and NC group. R½[1] X1 = 0.178 and R½[2] X2 = 0.108 in (1) and R½[1] X1 = 0.175 and R½[2] X2 = 0.0932 in (2). B PLS-DA of each treatment group and NC group. R½[1] X1 = 0.171 and R½[2] X2 = 0.106 in (1) and R½[1] X1 = 0.174 and R½[2] X2 = 0.0922 in (2). PLS-DA: partial least squares discriminant analysis and PCA: principal component analysis; (1) and (2) represent positive ions (left) and negative ions (right)Back to article page