http://www.popsci.com/scitech/article/2 ... c-and-what
urns out life has more essential building blocks to play with than previously thought: researchers at Rockefeller University have discovered a new nucleotide in the mammalian DNA code. Remember good ol' adenine, thymine, guanine and cytosine? Well, the alphabet of our DNA sequence is about to receive a new letter. Meet 5-hydroxymethylcytosine; we aren't sure what it does or where it's located, but we know it's important -- really important.
In the announcement, Nathaniel Heintz, director of the molecular biology lab that conducted the research, was exuberant about the significance of the finding: "This is another mechanism for regulation of gene expression and nuclear structure that no one has had any insight into. I think this finding will electrify the field of epigenetics."
Now what?
