Science Saturday II: A Second DNA Code Found
Researchers believe they have found a second code in DNA in addition to the genetic code.
This is not a hoax.
The genetic code specifies all the proteins that a cell makes, while the second code is superimposed on the first and sets the placement of nucleosomes, which are miniature protein spools around which the DNA is looped. The spools both protect and control access to the DNA itself.
The discovery, if confirmed, could open new insights into the higher order control of the genes, like the critical but still mysterious process by which each type of human cell is allowed to activate the genes it needs but cannot access the genes used by other types of cell.
For more, go here.