Protonated polynucleotide structures. XI. Polyadenylic acid at high ionic strength.
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Adenine Nucleotides↗
Biomedical subjects
W Guschlbauer
Publications and source records attributed to W Guschlbauer.
Nucleoside conformations. VII. Solvent effects on optical properties of adenosine and its derivatives in dilute solutions.
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Adenosine↗
Protonated polynucleotide structures. IX. Disproportionation of poly (G)-poly (C) in acid medium.
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Cytosine Nucleotides↗
Circular dichroism of transfer ribonucleic acid.
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Circular Dichroism↗
Physico-chemical properties of nucleosides. 4. Gel formation by quanosine and its analogues.
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Circular Dichroism↗
Optical properties of chemically synthetised polynucleotides containing D- or L-ribonucleosides.
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Journal Article↗
Protonated polynucleotide structures. Specific complex formation between polycytidylic acid and guanosine or guanylic acids.
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Chemical Phenomena↗
[Protonated polynucleotides. VII. Thermal transitions between different complexes of polyinosinic acid and polycytidylic acid in an acid medium].
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Chemical Phenomena↗
Interaction entre pigments et acides nucleiques Etude sur l'interaction de l'Actinomycine D avec les nucléosides par Dichroïsme Circulaire.
The interaction of Actinomycin C(1) (AM) with purine nucleosides was investigated by circular dichroism. While dG and dGMP show identical interactions, rG, rGMP and 8-aza-GMP show lower tendency for complex formation. ara-G shows no complex formation. 6-Thio-GMP shows the strongest affinity for AM in accordance with previous results. Substitution on N-7 (methylation, protonation) or C-8 (8-Br-rG, 8-SH-rG) eliminate completely the complexing capacity. Another type of weaker complexes is formed by dA, dAMP and rIMP, indicated by the appearance of a positive band at 440 nm. It is concluded that in these complexes both the electron donor capacity of the purine base as well as the steric flexibility of the sugar around the glycosidic linkage determine their complexing capacity.
Journal Article↗
Protonated polynucleotide structures Thermodynamics of the melting of the acid form of polyadenylic acid.
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Journal Article↗
Physicochemical properties of nucleosides 3. Gel formation by 8-bromoguanosine.
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Journal Article↗
[Physicochemical properties of nucleosides. II. Optic properties of some arabinosides (beta-D-arabinofuranosides)].
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Arabinose↗
[Specific interactions between poly (C) and guanosine in acid media].
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Chemical Phenomena↗
Protonated polynucleotide structures. 3. An optical rotatory dispersion study of the protonation of DNA.
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Adenine Nucleotides↗
[Interaction between pigments and nucleic acids. 6. Study of the interaction of actinomycin with DNA by optical rotatory dispersion].
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Acridines↗
Optical investigations on double stranded ribonucleic acid from turnip yellow mosaic virus.
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Chemical Phenomena↗
Evidence for a three stranded complex between poly I and poly C.
The conditions for the formation of a triple stranded semi-protonated complex between polyinosinic (poly (I)) and polycytidylic acid (poly (C)) are described. From potentiometric titrations and mixing curves, the stoichiometry and a phase-transition diagram is established between the partly protonated triple stranded and the unprotonated and completely protonated double helical complexes.
Journal Article↗
pH induced changes in optical activity of guanine nucleosides.
Optical rotatory dispersion and circular dichroism have been used to investigate the protonation of guanosine and some of its analogues. An inversion of the principal Cotton effect and the dichroic band is observed below the acid pK. It is suggested that a conformational change from the anti form above the pK to the syn form below the pK occurs. The reasons why this change should occur only in guanosine and not in adenosine are discussed.
Journal Article↗