DNA transistors

http://www.theverge.com/2013/3/30/4164468/dna-transistors-biological-computing
http://www.sciencemag.org/content/early/2013/03/27/science.1232758.abstract?sid=8b3ba921-4f1a-409e-9749-351d3750c5b0


Scientists at Stanford University have engineered a basic form of transistor using bacterial DNA, potentially paving the way for more complex biological computing systems. In a paper published in the journal Science this week, the five researchers describe how they used special enzymes to control the flow of nucleic acids in E. coli bacteria, creating living versions of the key logic gates — AND, OR, XOR, etc. — that form the basis of computer programming languages.