Figure 3 Heat Map of Liver Gene Expression Over 2,300 of the most differentially expressed genes in liver hierarchically clustered by animals (x-axis) against transcript levels (y-axis). Expression is reported as mlratio of individual experiment against a common pool. Red is over- and green underrepresented relative to pool. The expression values of the 23,574 transcripts were treated as quantitative traits and fitted to the same linear regression models used to compute LOD scores for clinical traits (eQTLs).