If, by contrast, you can resist the temptations created by more frequent portfolio modifications, an actively traded strategy may be more appropriate.
For example, certain histone modifications distinguish actively expressed regions of the genome from regions that are not highly expressed.
It has been observed that each modification is actively contributing towards improving the convergence, accuracy and efficiency of the algorithm.
Similarly, specific histone modifications may distinguish actively expressed genes from genes that are poised for expression or genes that are repressed in different kinds of cells.
Lander and Bernstein similarly determined specific histone modifications that distinguish actively expressed genes, genes poised for expression, and repressed genes in different kinds of cells.
For example, Zhao and colleagues identified specific histone modifications that distinguish actively expressed regions of the genome from repressed regions and found histone modifications that correlate with chromosome banding patterns.
Next we asked whether the presence of splice-site mutations had any influence on the chromatin state and we carried out ChIP experiments with antibodies against two different post-translational histone modifications that mark actively transcribed chromatin: trimethylation of lysine 4 in histone H3 (H3K4me3) and acetylation of histone H3 (H3ac).
However, a significant portion of the heritability observed for common diseases cannot be explained by additive genetic effects and alternative sources of genetic and epigenetic heritability, including gene gene and gene environment interactions, rare large-effect variants, somatic mutations, and epigenetic modifications are being actively investigated (Knight, 2009).
Generally, overexpression of MMSET results in an increase in H3K36 dimethylation, a histone modification associated with actively transcribed genes, and a concomitant genome-wide loss of H3K27 trimethylation, a histone modification associated with repressed genes.
Furthermore, not all genes on the X chromosome are inactivated; a small number escape modification and remain actively expressed from both X chromosomes in the cell.
