Instead, differences in composition between warm-water and cold-water ion channels were the result of a phenomenon called RNAediting, in which special enzymes alter the structure of the RNA messenger, and thus of the final protein.
Though RNAediting has been observed before, in animals ranging from humans to nematode worms, this is the first time an edit has been tied to a clear evolutionary difference caused by a feature of the environment in this case ambient temperature.