This article is part of a special issue on epigenomics.
Birds do it, bees do it, worms and ciliates do it too: DNA methylation from unexpected corners of the tree of life
School of Biology, Georgia Institute of Technology, 310 Ferst Drive, Atlanta, GA 30332, USA
Genome Biology 2012, 13:174 doi:10.1186/gb-2012-13-10-174Published: 17 October 2012
Studies describing intricate patterns of DNA methylation in nematode and ciliate are controversial due to the uncertainty of genomic evolutionary conservation of DNA methylation enzymes.