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Conformational transitions and hydration of poly d (A-T) · poly d (A-T) in fibers

✍ Scribed by A. Abouelkassimi; G. Albiser; S. Premilat

Book ID
104655444
Publisher
Springer
Year
1991
Tongue
English
Weight
532 KB
Volume
20
Category
Article
ISSN
1432-1017

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✦ Synopsis

Conformational transitions of polyd(A-T). poly d(A-T) have been studied by fiber X-ray diffraction and measurement of fiber dimensions. Results obtained for the D-A-B and D-B transitions are presented and analyzed. For all these form transitions, cooperativity effects are observed for the variation of the rise per nucleotide versus the relative humidity. Detailed information about hydration of the polynucleotide during form transitions and the numbers of water molecules per nucleotide necessary to stabilize the different helical conformations are presented.

📜 SIMILAR VOLUMES

Infrared dichroism of polynucleotides of
Infrared dichroism of polynucleotides of repeated sequence. I. Poly(dA)·poly(dT) and poly[d(A-T)]·poly[d(A-T)]
✍ J. FrançOis Baret; Gérard P. Carbone; Paul Penon 📂 Article 📅 1978 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 982 KB

## Abstract Infrared dichroism measurements of oriented films of poly(dA)·poly(dT) and poly[d(A‐T)]·poly[d(A‐T)] have been made under the conditions of low salts content and high humidity for which the geometry is known. The angles which the transition moments make with the helix axis are compared

Poly[d(A-T)-Cs+] conformations studied b
Poly[d(A-T)-Cs+] conformations studied by IR spectroscopy
✍ S. Adam; P. Bourtayre; J. Liquier; J. A. Taboury; E. Taillandier 📂 Article 📅 1987 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 490 KB

## Infrared absorption and ir linear dichroism measurements have been performed on poly[d(A-T)- Cs'] f i l m s at various relative humidities. At high relative humidity, samples are in a B form; at low relative humidity, in a C form. The B + C conformational transition is shown to be a noncooperat