Two-dimensional smectic ordering of linear DNA chains in self-assembled DNA-cationic liposome mixtures
1997-09-29 | journal article; research paper. A publication with affiliation to the University of Göttingen.
Jump to: Cite & Linked | Documents & Media | Details | Version history
Documents & Media
Details
- Authors
- Salditt, Tim ; Koltover, I; Radler, J. O.; Safinya, C. R.
- Abstract
- We report a synchrotron x-ray scattering study of linear DNA chains and cationic liposome mixtures which spontaneously self-assemble into a coupled two-dimensional (2D) smectic phase of DNA chains imbedded between lipid bilayers of a 3D smectic phase. The DNA peak is quantitatively described by anisotropic exponentially decaying chain-chain correlations. The measured interchain compressibility modulus B(d) as a function of the interhelical spacing d of the 2D smectic, with 25 < d < 60 Angstrom, is not described by hard core repulsions but, rather, is dominated at larger spacings d > 35 Angstrom by long-range electrostatic repulsions.
- Issue Date
- 29-September-1997
- Journal
- Physical Review Letters
- Organization
- Institut für Röntgenphysik
- Working Group
- RG Salditt (Structure of Biomolecular Assemblies and X-Ray Physics)
- ISSN
- 0031-9007
- Subject(s)
- membrane biophysics