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Health costs soar as 60 million Americans classed as obese

ng RNA as a proof of principle for their DNA constraint studies, they also plan to use the new technique to more effectively study the folding process of RNA. Because they can control RNA structure precisely, they could generate and examine biologically relevant folded and misfolded RNAs. They could also hook the DNA constraints to other molecules, including non-biological macromolecules, to control their folding.

Importantly, the process of manipulating macromolecules with DNA constraints can be either reversible or irreversible, depending on which chemical trigger is used. Like a switch, a particular molecular shape could be turned on and off.

"Another key aspect of DNA constraints is their programmability," Silverman said. "By placing two or more constraints on one molecule, we could generate multiple molecular states that would be programmable by DNA sequence. In other efforts, we would like to control macroscopic assembly processes by influencing the shapes of self-assembling molecular components."


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