There is now a proof that the simplest universal turing machine has 2 states 3 colors
This kind of machine would be a simpler and easier target for those working on molecular computing
Universal Turing machines in wikipedia. A turing machine that can simulate all other turing machines

Brian Wang is a Futurist Thought Leader and a popular Science blogger with 1 million readers per month. His blog Nextbigfuture.com is ranked #1 Science News Blog. It covers many disruptive technology and trends including Space, Robotics, Artificial Intelligence, Medicine, Anti-aging Biotechnology, and Nanotechnology.
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