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Investigation of DNA complexes with iron ions in solution
N Kasyanenko1, N Arikainen, E Frisman
1Department of Physics, St. Petersburg State University, Russian Federation.
Biophysical Chemistry
|April 16, 1998
Abstract:
The optical anisotropy and intrinsic viscosity of DNA-Fe3+ complexes have been investigated. It was shown that the binding of iron ions to DNA causes the shrinkage of the macromolecule. The formation of such complexes is accompanied by increasing DNA optical anisotropy. We suggest that the binding of iron ions to widely spaced along the chain DNA groups creates the conditions for initiation of mutually oriented DNA fragments, thus, ensuring a higher molecular optical anisotropy.