Murphy PJ, Cipriany BR, Wallin CB, Ju CY, Szeto K, Hagarman JA, Benitez JJ, Craighead HG, Soloway PD.

Proc Natl Acad Sci U S A. 2013 May 7;110(19):7772-7. doi: 10.1073/pnas.1218495110

Single-molecule analysis of combinatorial epigenomic states in normal and tumor cells.

Demethylation increases H3K27me3 in primary cells and decreases it in immortalised cells, nevertheless in both case the modifications stay mutually exclusive.