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Oh I thought it was DNA that was switched "off".Aught3 said:Transcription factors are the most likely to switch a gene on. I don't see how this relates to junk DNA though. Junk DNA is both the 'rubbish' that we don't need in our genomes (e.g., transposons) and the sequence which has no known function (yet).
soon as I saw the title, i wondered 'Is anyone familiar w/ epigenetics here'Spase said:When I saw this I had to link this article:
http://www.nytimes.com/2009/02/24/science/24chromatin.html?_r=1&scp=3&sq=epigenome&st=cse
It's about what's now being called the epigenome.. which is a pretty new concept. The idea being that entire stretches of DNA are turned on and off based on signaling which is passed to the proteins that are involved in packing the DNA.