<p>The heat map depicts expression signal values for 39 Affymetrix Human U133_X3P probe sets detected in FFPE sections from all four hybrids tested (IMM001-004) and a hamster control (IMM006). Prior to unsupervised hierarchical clustering, the MAS 5.0 signal values were log2-transformed and row mean centered. Samples were clustered by Complete Linkage based on Pearson correlation; probe sets were clustered by Complete Linkage based on Euclidean distance. Criteria for detectable human gene expression included MAS 5.0 Detection p-values ≤0.065 in the hybrid sample and >0.065 in the hamster control, and ≥2-fold increased signal in the hybrid sample vs. the hamster control.</p
