Thus, Nkx3.1 acquired a repressive mark characteristic of EZH2 activity in an ERG-dependent manner.
To further prove the role of EZH2, we determined by ChIP whether the Nkx3.1 promoter acquired the H3K27 methylation mark characteristic of EZH2 activity in cells in which the gene was repressed.
PRC2-member EZH2 catalyses the histone mark characteristic for PcG-mediated silencing: trimethylation of lysine 27 in histone H3 (H3K27me3) [ 3].
When we followed the presence of histone modifications alone or in combination with each other during differentiation, we found that the most prevalent mark characteristic for active genes, the double H3K4me3/AcH3, often persisted on genes throughout the differentiation process.
Using chromatin immunoprecipitation followed by deep sequencing (ChIP-Seq) and bioinformatics analysis, we show that H4K5ac in the hippocampus is prevalent throughout the genome and is a mark characteristic of actively transcribed genes.
REV1-deficient cells show significantly reduced enrichment of these modifications at the BU-1A promoter but no increase in the H3K9me3 (Fig 7C), a mark characteristic of heterochromatinised loci, consistent with our previous observations (Sarkies et al., 2012).
This idea would appear to be supported by the observation that phosphorylation of serine 5, a mark characteristic of the initiating form of RNA polymerase II (Pol II Ser5-P), is present at similar levels at TSS1 [ 10], a transcription start site identified in early studies [ 4].
> Twenty-five Current Mammograms, on which the cancer had strong features and was seen on both views, were processed by the CAD system to evaluate the intrasystem and intersystem reliability in marking characteristics associated with cancer.
The surfaces bear ripples from wind as well as warty marks characteristic of sand blown across a slightly damp surface.
VANITY FAIR's "Proust Questionaire" asked what was her most marked characteristic.
