Screenshots and movies

single-stranded DNA

double-stranded DNA

Plectoneme formation

See also the following movies:

https://www.youtube.com/watch?v=Njpp_DWAhBg

https://www.youtube.com/watch?v=3GusNEYkRM4

DNA tetrahedron

Strand displacement

Invading strand attached by toehold

Invading and victim strands that are not coaxially stacked

Invading and victim strands that are coaxially stacked

http://www-thphys.physics.ox.ac.uk/people/PetrSulc/images/movie2.mp4 A movie of part of the strand displacement process. It shows the invading strand attached by toehold and then displacing several base pairs of the victim strand

DX tile

Kissing hairpin