Building blocks help silence genes

Polycomb-group proteins play an important role in controlling gene expression. Complexes containing PcG proteins are thought to inhibit or 'silence' gene activity by localizing to specific targets in the genome and remodeling how DNA is wound up into chromosomes, but the exact mechanism by which these complexes repress gene activity remains poorly ... (more)

http://medicalxpress.com/news/2013-11-blocks-silence-genes.html