Abstract |
The native T2 DNA in solutions with different LiCl concentrations was oriented by pumping through a capillary device similar to that described in rf. 1. The change of the parallel, deltaepsilon parallel, and perpendicular, 2 delta epsilon perpendicular, components of circular dichroism tensor was studied as a function of salt concentration. Positive (delta epsilon parallel 280) and negative (2 delta epsilon perpendicular 280) components were shown to increase in absolute magnitude, so that there was a monotonous drop in the longwave band magnitude of the isotropic delta epsilon 280 as a result of compensation; the shortwave band magnitude of the isotopic delta 245 and its anisotropic components were constant. It is proposed that while the helix is winding as a result of LiCl rise progressive tilting of base pairs takes place. It was also shown that the glucosylated T2 DNA in solution is wound to a greater extent than the non- glucosylated DNA of the same GC-content.
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Authors | S K Zavriev, M V Vol'kenshteĭn, V I Ivanov, L E Minchenkova |
Journal | Molekuliarnaia biologiia
(Mol Biol (Mosk))
1977 Mar-Apr
Vol. 11
Issue 2
Pg. 418-22
ISSN: 0026-8984 [Print] Russia (Federation) |
Vernacular Title | Issledovanie konformatsionnogo perekhoda DNK v predelakh B-semeĭstva metodom anizotropii krugovogo dikhroizma. |
PMID | 379600
(Publication Type: Journal Article)
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Chemical References |
- DNA, Viral
- Glucosides
- Pyrimidines
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Topics |
- Circular Dichroism
- Coliphages
- DNA, Viral
- Escherichia coli
- Glucosides
- Nucleic Acid Conformation
- Pyrimidines
(analysis)
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