Junk DNA is, AFAIK, not actively expressed (used to create proteins). It's important, though, in the sense that spacing between gene expression sites is a control on which genes get expressed under which conditions (so the junk adds necessary spacing between important genes).
I did _some_ research on epigenetics during my MS degree. Spacing between sites was an important factor in our modeling of gene expression.
I did _some_ research on epigenetics during my MS degree. Spacing between sites was an important factor in our modeling of gene expression.