Figure 4

Beta and alpha tubulin introns. Beta and alpha tubulin introns are plotted on an insect phylogeny [19], and on Dmα1 and Dmβ1 protein sequences. Introns are labeled A-W and A-V, from the most 5' to most 3' intron found in beta and alpha tubulins. Introns for taxa with multiple copies of an isoform are presented in order, ie. Nvα1a/Nvα1b/Nvα1c.