Double illegitmate recombinaton events integrate DNA segments through two diferent mechanisms during natural transformaton of Acinetobacter baylyi.

Hülter N, Wackernagel W (2008); Mol Microbiol., 67(5):984-995. doi: 10.1111/j.1365-2958.2007.06096.x

Evolutionary dynamics of introns in plastid-derived genes in plants: saturation nearly reached but slow intron gain continues. Specificity of the innate immune system and diversity of C-type lectin domain (CTLD) proteins in the nematode Caenorhabditis elegans.