Epigenetics: DNA controls (Introduction)

by David Turell , Tuesday, June 11, 2013, 15:42 (3978 days ago) @ David Turell

And again complexity. In histones, the spools around which DNA is wound, there is a code to control methylation and other gene modifications. The code is not yet understood, but provides another layer of controls over gene expression. It shows why only roughly 22,000 genes control human biology.-http://medicalxpress.com/news/2013-06-piece-histone-code-puzzle.html