Study of DNA-spermine interactions by use of small-angle and wide-angle X-ray scattering and circular dichroism
Open Access
- 1 October 1978
- journal article
- research article
- Published by Oxford University Press (OUP) in Nucleic Acids Research
- Vol. 5 (10) , 3801-3810
- https://doi.org/10.1093/nar/5.10.3801
Abstract
Circular dichroism measurements with DNA-spermine complexes at 0.075 M NaCl and at 0.15 M NaCl reveal +Ψ (type I) and −Ψ (type II) CD spectra respectively. From small-angle X-ray scattering studies it could be shown that type I has a long-range order, short-range order supramolecular structure, while type II is of long-range disorder, short-range disorder structure. The secondary structure of the DNA in both types of condensates is B-like as concluded from wide-angle X-ray scattering diagrams of the condensates and from a comparison with the wide-angle X-ray curves of DNA and RNA in solution.Keywords
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