These phenotypic differences between a and α cells are due to a different set of genes being actively transcribed and repressed in cells of the two mating types.

H3K4me3 is found in actively transcribed promoters, particularly just after the transcription start site.

H3K36me3 is found in actively transcribed gene bodies.

H3K9ac is found in actively transcribed promoters.

H3K14ac is found in actively transcribed promoters.

This level of chromatin structure is thought to be the form of euchromatin, which contains actively transcribed genes.

The insertion tends to occur near actively transcribed genes, as this is where the chromatin structure is loosest, so the DNA most accessible.

From the recent experiments, they found that in a bacterial genome a considerable segment of the intergenic regions are actively transcribed.

Cytosine methylation has been correlated with diminished gene expression, but it has also been observed in actively transcribed genes.

Acetylation of lysine14 is commonly seen in genes that are being actively transcribed into RNA.