(http://news.bbcimg.co.uk/media/images/60398000/jpg/_60398419_60397336.jpg)
Basically a group of researchers in the United States have figured out a way of a re-writing a small section of the DNA structure called "bits" (whether this is the official name or just a loose name they gave it, I'm unsure) by injecting two competing proteins into the DNA, once the right balance was achieved it allowed them to make the bits respond by glowing a certain color, the color the DNA glowed was dependent on its orientation (which means the bits were to glow different colors from the rest upon manipulation). Effectively it allows researchers to "compute" a small section of a biological system.
"After some 750 trials, the team struck on the right recipe of proteins, and now have their sights set on creating a full "byte" - eight bits - of DNA information that can be similarly manipulated."
Now I don't study biology or have extensive knowledge in the subject, but even I know that this sounds pretty darn cool.
Link to the article: http://www.bbc.co.uk/news/science-environment-18158131