noun
- a coiled structure formed when a helix is itself twisted into a helical shape
Usage: biochemistry; molecular biology
Examples
- DNA forms a superhelix when it is wound more tightly than its relaxed state.
- The enzyme topoisomerase relieves tension in the DNA superhelix.
- Bacterial chromosomes exist as superhelical structures within the cell.
- The superhelix formation is crucial for DNA packaging in prokaryotes.
- Scientists study how proteins interact with the DNA superhelix.
- Negative superhelical tension facilitates DNA unwinding during replication.