## Abstract Transient electric birefringence measurements of the rotational diffusion constant of five short restriction fragments of the plasmid pBR322 show that the hydrodynamic length is independent of sodium ion concentration in the range of 0.2 to 2.5 m__M__. The fragments are too stiff to be
Electric properties and structure of DNA restriction fragments from measurements of the electric dichroism
✍ Scribed by Stephan Diekmann; Wolfgang Hillen; Manfred Jung; Robert D. Wells; Dietmar Pörschke
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 996 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0301-4622
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Institut fur biophysikalische Chemie, 0-3400 Gottingen, Federal Republic of Germany ## Synopsis The linear dichroism is calculated for DNA fragments in their thermal bending equilibrium. These calculations are given for relatively short frtgments, where bent molecules can be described by an arc
## Abstract We have used an __in vitro__ preparation of the frog arachnoid membrane to study the role of this membrane in the maintenance of the “blood‐cerebrospinal fluid (csf) barrier.” Electron microscopy showed that the membrane was made up of 10–15 layers of flat epithelial cells joined togeth