Figure 2. Cluster dendrogram and heat map results. Cluster dendrogram (A) shows relationships in gene expression among UCB1, UCB4, young HCEC, and older HCEC samples. The heatmap in (B) shows relative levels of gene expression at a p-value of 0.001 between UCB1 and UCB4 MSCs and HCECs from young and older donors. The relative levels of gene expression are depicted using a color scale where red represents the lowest and green represents the highest level of expression.