Phylogenetic tree of insect OR.

<p>The <i>S</i>. <i>pyrastri</i> translated genes are shown in blue. This tree was constructed using PhyML based on alignment results of ClustalX. Orco clade is marked in red. Sp: <i>S</i>. <i>pyrastri</i>, Ap: <i>Acyrthosiphon pisum</i>, Ag, <i>A</i>. <i>gossypii</i>, Dm: <i>D</i>. <i>melanogaster</i>, Sc: <i>Stomoxys calcitrans</i>, Md: <i>Musca domestica</i>, Cr: <i>Chrysomya rufifacies</i>, Cm: <i>Chrysomya megacephala</i>, Cs: <i>C</i>. <i>stygia</i>, Ls: <i>Lucilia sericata</i>, Cv: <i>Calliphora vicina</i>.