REMARKABLE ROLE. “Due to the high abundance of MULEs and their remarkable functional roles in genome evolution, it is imperative to elucidate the origination, evolutionary processes, and regulatory mechanisms of MULE-derived genes in plant genomes.” (MULEs = Mutator-like transposable elements).
http://genomebiology.biomedcentral.com/articles/10.1186/s13059-016-0954-8