Gene expression-profiling. Linear regression analysis of mRNA levels in HDMECs/HemECs (A), HDMECs/cbEPCs (B), HDMECs/HemEPCs (C), HemECs/cbEPCs (D), HemECs/HemEPCs (E), and HemEPCs/cbEPCs (F). (A-F) Mean and 2 SD limits are indicated by gray lines. The array contained 113 genes encoding matrix proteins and proteins involved in cell-cell and cell-matrix interactions.