Molecular determinants and guided evolution of species-specific RNA editing:
Here I report striking variation between species in the recoding of synaptotagmin I (sytI). Fruitflies, mosquitoes and butterflies possess shared and species-specific sytI editing sites, all within a single exon. Honeybees, beetles and roaches do not edit sytI. … Taken together, these data support a phylogeny of sytI gene editing spanning more than 250 million years of hexapod evolution. The results also provide models for the genesis of RNA editing sites through the stepwise addition of structural domains, or by short walks through sequence space from ancestral structures.
Common descent, and evolution generates new testable hypotheses. Very cool.