Figure 8

Discrimination between expression profiles of ERCC microarray data. The discrimination between ERCC 'normal' and 'disease' panels A and B across three independent microarray experiments (Runs 1, 2, 3) was assessed in the following ways: (A) PCA was performed using expression data for all eight ERCC standards containing 100 replicates of each probe based on conditions (panel and experimental run). (B) Discrimination of microarray measurements between DEGs and non-DEGs was assessed by PCA based on entities. Dots represent individual microarray features (100 per standard).