Bimodal quantitative relationships between histone modifications for X-linked and autosomal loci

Proceedings of the National Academy of Sciences , Vol. 110, No. 17. , pp. 6949-6954, doi:10.1073/pnas.1216449110 Gene expression is controlled by coordinated action of many epigenetic mechanisms including covalent histone modifications.

http://www.citeulike.org/user/dakelley/article/12300486