The DNA molecule is a powerful tool for guiding chemical reactions.

“Ionic interactions involving DNA phosphates are ubiquitous and essential across all kingdoms of life. For the first time, their catalytic potential has been demonstrated in a variety of asymmetric transformations through ion-pairing interactions in water. Credit: National University of Singapore” (ScitechDaily, Chemists Discover Unexpected New Way to Use DNA)

The DNA has phosphate parts that can be used to control other molecules. That effect should deny the formation of the mirror molecules. It is an extremely important thing. In medical chemistry. May medical molecules have the right effect only if they enter the cell in the right way. If a molecule travels the wrong way through the ion pumps. 

That molecule will cause a dangerous effect. Medical molecules are very complicated. They must act precisely right. And this makes cis-trans isomerism very important. The mirror molecule can even destroy the unwanted cells. 

“In nature, DNA and proteins naturally attract one another because of their opposite charges. DNA’s phosphate groups carry negative charges, while many of the building blocks that make up proteins are positively charged” (ScitechDaily, Chemists Discover Unexpected New Way to Use DNA). 

As a result, there, the phosphate pushes molecules and ions with a negative charge and pulls anions into it. Making it possible to use that effect also in nanotechnology, where phosphate pushes and pulls ions and anions in the small-scale nanostructures. 

This thing can make it possible. To create more complicated nanosystems. And in those processes, DNA and its phosphate act as a magic stick. That can push and pull wanted molecules. These kinds of nanotweezers can push and pull molecules and atoms more sensitively than some lasers or acoustic beams can. 

https://scitechdaily.com/chemists-discover-unexpected-new-way-to-use-dna/