Figure 4.

Correspondence Analysis of relative synonymous codon usage (RSCU) for 7,160 homologous gene pairs from rice and Arabidopsis. The Figure shows the distribution of genes on the primary and secondary axes (accounting for 40.2% and 4.2% of the total variation, respectively). High GC rice genes are shown in red; Low GC rice genes are shown in blue; the Arabidopsis homologs are shown in yellow.