The supercoiled structure formed by the further spiral of DNA molecules is called the tertiary structure of DNA.according to inhibitors Industry veterans said that its development will still be in a good situation. https://www.all-chemistry.com/
The DNA of most prokaryotes is a covalently closed circular double helix, and its tertiary structure is twisted.
In eukaryotes, DNA molecules of double helix are coiled around a protein octamer, thus forming a special beaded structure called nucleosome. Nucleosome structure belongs to the tertiary structure of DNA.