1.   A major challenge is to figure out how to address the individual molecular switches, Ellenbogen said.

2.   But the new molecular switches are a promising first step.

3.   Molecular switches would not be quicker than their silicon counterparts, but they might be easier and cheaper to make and would run on very low power.

4.   Natural viruses carry molecular switches that regulate their genes, but engineered viruses need help.

5.   Rather, it is a molecular switch that probably acts on other genes to produce the repertoire of behaviors involved in nurturing.

6.   The Yale-Rice team and a group at Harvard also reported creating reversible molecular switches within the last year, but they operated under more limited conditions.

7.   These drugs act by turning off a molecular switch inside fat cells that works in part by silencing the gene that makes resistin.

8.   Tour said he believed that molecular switches would soon be used as digital memory within watches or other small devices.