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Nucleic Acids Research, 1981, Vol. 9, No. 3 743-752
© 1981

CHEMISTRY

Two modes of longe-range orientation of DNA bases realized upon compaction

Yu.M. Yevdokimov*,, V.I. Salyanov and H. Berg

Institute of Molecular Biology of the Academy of Sciences of the USSR Moscow, USSR Central Institute of Microbiology and Experimental Therapy of the Academy of Sciences of the GDR Jena, GDR

*To whom correspondence

Received August 21, 1980. Formation of compact particles from linear DNA-anthracycline complexesis accompanied by appearance of intense bands in the CD spectra in the region of absorption of DNA bases (UV-region) and in the region of absorption of anthracycline chromophores(visible region). The intense (positive or negative) bands in the region of anthracycline absorption demonstrate an order edhelical location of anfhracycline molecules on the DNA template. This fact, in its turn, is related to formation of the DNA superstructure in PEG-containingvater-salt solutions with a long-range orientation of nitrogen bases. Possible types of DNA super structures and the relation between the local-and the Long-range order of bases in the DNA super structure are discussed.


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