Before revision:  183, 1793 (2012) ] . We simulate the operation of the AND gate using several lengths of the toehold and the adjacent domains. Our simulations exhibit non-ideal behaviour as expected in an experimental implementation of strand displacement operations.
After revision:  183, 1793 (2012) ] . We simulate the operation of the AND gate . This path is strongly influenced by non-ideal behaviour as expected in an experimental implementation of strand displacement operations.