| The backbone of both strands in the double helix is a chain of linked phosphate and deoxyribose molecules. |
| In an actin filament, two chains of actin beads wrap around each other in yet another double helix. |
| This comes from the structure of the sugar molecules used in the DNA double helix. |
| This molecule, however, can exist in two enantiomeric forms depending on how the molecule enters the DNA double helix. |
| As the force is increased, the structural parameters of the DNA double helix are revealed, including the free energy of the basepair interaction. |
| Genetics and crime fighting are becoming as intertwined as the DNA double helix. |
