Figure 7.

Isoforms Possessing Extra Twin-Positive Motifs Have Significantly Higher RNA Expression in Roots.

(A) Venn diagram of the group of high-confidence Arabidopsis plastid proteins (1153 proteins) and the group of proteins encoded by recently duplicated gene pairs (3044 pairs), resulting in identification of 75 pairs of plastid preproteins encoded by recently duplicated genes.

(B) Among homologous gene pairs, the isoform with extra twin-positive motifs has significantly higher RNA expression in roots. RNA expression data were downloaded from the Arabidopsis eFP website. A Wilcoxon signed-rank test was performed (V = 156 and P < 0.05; V corresponds to the sum of ranks assigned to the differences with positive sign.).