Figure 6

Spots of low fold change are under represented in heterologous hybridization. The 804 reference set spots are divided into 6 classes according to fold change (> 6.0 n = 41; 5.0 – 6.0 n = 24; 4.0 – 5.0 n = 85; 3.0 – 4.0 n = 128; 2.0 – 3.0 n = 305 and 1.0 – 2.0 n = 221). For each fold change class (x-axis) the percentage of spots in that class (y-axis) that are also identified (p < 0.05) in other species are depicted by colour coded symbols. The under representation of low fold change classes is most dramatic for more distantly related fish (note salmon, green and zebrafish, yellow).