33 citations · 77 across the 14 of their papers we have counts for
7 papers · 1 filter
Duality of maximal-torsion and close-packing in double helices
Kasper W. Olsen, Jakob Bohr
It is suggested that there is an interesting transition in double helices. The transition is between a helix, which has maximal torsion for the constituting helical strands, and a…
Twist neutrality, a zero sum rule for oriented closed space curves with applications to circular DNA
Jakob Bohr, Kasper W. Olsen
The interplay between global constraints and local material properties of chain molecules is a subject of emerging interest. Studies of molecules that are intrinsically chiral, suc…
Transcription and the Pitch Angle of DNA
Kasper W. Olsen, Jakob Bohr
The question of the value of the pitch angle of DNA is visited from the perspective of a geometrical analysis of transcription. It is suggested that for transcription to be possibl…
First principles structures and circular dichroism spectra for the close-packed and the 7/2 motif of collagen
Karl J. Jalkanen, Kasper Olsen, Michaela Knapp-Mohammady +1
The recently proposed close-packed motif for collagen is investigated using first principles semi-empirical wave function theory and Kohn-Sham density functional theory. Under thes…
The size of the nucleosome
Jakob Bohr, Kasper Olsen
The structural origin of the size of the 11 nm nucleosomal disc is addressed. On the nanometer length-scale the organization of DNA as chromatin in the chromosomes involves a coili…
The close-packed triple helix as a possible new structural motif for collagen
Jakob Bohr, Kasper Olsen
The one-dimensional problem of selecting the triple helix with the highest volume fraction is solved and hence the condition for a helix to be close-packed is obtained. The close-p…