Results 221 to 230 of about 369,422 (270)

NMR of proteins and nucleic acids

, 1988
Introduction and Survey. THE FOUNDATIONS: STRUCTURE AND NMR OF BIOPOLYMERS. NMR of Amino Acid Residues and Mononucleotides. NMR Spectra of Proteins and Nucleic Acids in Solution. The NMR Assignment Problem in Biopolymers.
K. Wüthrich
semanticscholar   +1 more source

Conformation of Viral Nucleic Acids in Situ

1969
Publisher Summary The problems that are discussed in this chapter are confined to viruses, and to be more exact, to the question of similarities and differences between the structure and properties of usual forms of nucleic acids in solution and that of nucleic acids inside viral particles.
openaire   +3 more sources

Conformational principles of nucleic acids

1981
From a conformational standpoint, nucleic acids are enormously complex. In order to rigorously describe, for example, the secondary structure of a repeating polynucleotide such as fibrous poly dA·dT, the values of twelve torsion angles must be ascertained (Figure 1.1); contrast this with a repeating polypeptide where only two conformation angles need ...
openaire   +2 more sources

Conformational geometry and vibrational frequencies of nucleic acid chains

Biopolymers, 1975
AbstractNormal coordinate analysis of diethyl phosphate has been made, which predicts all observed Raman frequencies in the range 170–1300 cm−1. The force constants from this calculation have been transferred to a vibrational calculation for a simplified model of the backbone of nucleic acids, which also involves the OPO2−O phosphate group and the ...
Ellen B. Brown, Warner L. Peticolas
openaire   +3 more sources

Nucleic acid-triggered NADase activation of a short prokaryotic Argonaute.

Nature, 2023
Xiaopan Gao, Kun Shang, Kaixiang Zhu, Linyue Wang, Z. Mu, Xingke Fu, Xia Yu, B. Qin, Hongtao Zhu, Wei Ding, Sheng Cui   +10 more
semanticscholar   +1 more source

Characterization of dipyridophenazine complexes of ruthenium(II): the light switch effect as a function of nucleic acid sequence and conformation.

Biochemistry, 1992
Spectroscopic parameters for two novel ruthenium complexes on binding to nucleic acids of varying sequences and conformations have been determined. These complexes, Ru(bpy)2dppz2+ and Ru(phen)2dppz2+ (bpy = 2,2'-bipyridine; phen = 1,10-phenanthroline ...
Y. Jenkins, A. Friedman, N. Turro, J. Barton   +3 more
semanticscholar   +1 more source

Recent Advances in Chain Conformation and Bioactivities of Triple-helix Polysaccharides.

Biomacromolecules, 2020
Natural polysaccharides derive from renewable biomass sources, and are regarded as environmentally friendly and sustainable polymers. As the third abundant biomacromolecule after protein and nucleic acid in nature, polysaccharides are also closely ...
Y. Meng, Fengzhi Lyu, Xiaojuan Xu, Lina Zhang   +3 more
semanticscholar   +1 more source

Ionic Effects on the Stability and Conformation of Peptide Nucleic Acid Complexes

, 1996
Peptide nucleic acid (PNA) is a DNA analogue in which the negatively charged sugar phosphate backbone has been substituted by uncharged N-(2-aminoethyl)glycine units.
S. Tomac, M. Sarkar, T. Ratilainen, P. Wittung, P. Nielsen, B. Nordén, A. Gräslund   +6 more
semanticscholar   +1 more source

An ab initio molecular orbital study on the stacking interaction between nucleic acid bases: Dependence on the sequence and relation to the conformation

, 1986
The stacking interaction energies between nucleic acid bases in A DNA and B DNA are calculated by means of the ab initio molecular orbital method. The calculated values agree well with the experimental values of stacking enthalpy changes.
M. Aida, C. Nagata
semanticscholar   +1 more source

The Dynamics of Nucleic‐Acid Single‐Strand Conformation Changes

, 1973
1 The dynamics of the single-strand conformation changes of oligo- and polyriboadenylic acids has been investigated by a fast temperature-jump technique. Chemical rexalation processes have been observed in the range of 0.1 to 1 μs.
D. Porschke
semanticscholar   +1 more source