] The first game-playing DNA computer has been revealed -
] an enzyme-powered tic-tac-toe machine that cannot be
] beaten.
]
] The human player makes his or her moves by dropping DNA
] into 3 by 3 square of wells that make up the board. The
] device then uses a complex mixture of DNA enzymes to
] determine where it should place its nought or cross, and
] signals its move with a green glow.
]
] The device, dubbed MAYA, was developed by Milan
] Stojanovic, at Columbia University in New York, and Darko
] Stefanovic, at the University of New Mexico in
] Albuquerque. Kobi Benenson, who works on other DNA
] approaches at the Weizmann Institute in Israel, says the
] work demonstrates the most complex use of molecules as
] logic gates to date, and "represents a significant
] advance in DNA computing."