Fig. 6.—

AS of 3R-MYB proteins in Amborella, Arabidopsis, grape, popular, rice and sorghum. The group (A-, B-, or C-) membership for each gene is indicated in brackets. Boxes indicate exons (blue for constitutively spliced; orange for alternatively spliced) and lines indicate introns. Gene structures are drawn to scale and connecting bars indicate homologous exons (green for the six exons encoding the DNA binding domain; pink for the four exons specific to the A-group; gray for all others). The two black flags in each gene indicate the start and stop codon in the primary transcript and red hexagons indicate stop codons generated by AS. The green circles at the end of the exons indicate alternative polyadenylation events.