Diffraction from the beta -sheet crystallites in spider silk
2008-11-01 | journal article; research paper. A publication with affiliation to the University of Göttingen.
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- Authors
- Ulrich, S.; Glisovic, Anja; Salditt, Tim ; Zippelius, Annette
- Abstract
- We analyze the wide-angle X-ray scattering from oriented spider silk fibers in terms of a quantitative scattering model, including both structural and statistical parameters of the beta -sheet crystallites of spider silk in the amorphous matrix. The model is based on kinematic scattering theory and allows for rather general correlations of the positional and orientational degrees of freedom, including the crystallite's size, composition and dimension of the unit cell. The model is evaluated numerically and compared to experimental scattering intensities allowing us to extract the geometric and statistical parameters. We show explicitly that for the experimentally found mosaicity (width of the orientational distribution) inter-crystallite effects are negligible and the data can be analyzed in terms of single-crystallite scattering, as is usually assumed in the literature.
- Issue Date
- 1-November-2008
- Journal
- The European Physical Journal E - Soft Matter
- Organization
- Fakultät für Physik ; Institut für Röntgenphysik
- Working Group
- RG Salditt (Structure of Biomolecular Assemblies and X-Ray Physics)
- ISSN
- 1292-8941
- Subject(s)
- x-ray scattering; molecular biophysics