MeCP2 recognizes cytosine methylated tri-nucleotide and di-nucleotide sequences to tune transcription in the mammalian brain. - Lagger S; Connelly JC; Schweikert G; Webb S; Selfridge J; Ramsahoye BH; Yu M; He C; Sanguinetti G; Sowers LC; Walkinshaw MD; Bird A (PLoS genetics, 2017)