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Molecular field theory of hysteresis in helix–coil transitions of polynucleotides

✍ Scribed by G. Weisbuch; E. Neumann

Book ID
102761439
Publisher
Wiley (John Wiley & Sons)
Year
1973
Tongue
English
Weight
562 KB
Volume
12
Category
Article
ISSN
0006-3525

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✦ Synopsis

Abstract

A molecular field theory, taking into account long‐range electrostatic forces is used to study helix–coil transitions of polynucleotides. The theory predicts the existence of hysteresis when the electrostatic interaction parameter is large compared to the thermal energy. The theory is applied to the acid–base titration of poly(A)·2 poly(U).

📜 SIMILAR VOLUMES

Dependence of polynucleotide helix–coil
Dependence of polynucleotide helix–coil transition theory on the ring closure exponent
✍ L. C. Klotz 📂 Article 📅 1969 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 361 KB 👁 2 views

Formulas are derived which relate the maximum slope of the helix-coil transition in synthetic polynucleotides to the stacking free energy and to the exponent k in the expression for the probability of ring closure for polymer chains. The exact value of k has not yet been determined. By use of the de

Enthalpies of helix–coil transitions in
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✍ F. E. Karasz; G. E. Gajnos 📂 Article 📅 1974 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 565 KB

## Abstract Certain discrepancies in measured heats of helix–coil transitions in polypeptides are examined in terms of the theory of the effect of solvent composition on transition temperatures and heats in such systems. It is found, generally, that disagreement between enthalpy measurements conduc

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Calculation of the molecular parameters of the α-helix–coil and β-structure–coil transitions
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## Abstract Monte‐Carlo calculations of geometric and thermodynamic characteristics of the α‐helix and the β‐structure of polypeptides have been carried out. To describe a hydrogen bond both the Lippincott–Schroeder and Morse potentials were used. The internal rotation angles φ and ψ in the α‐helix

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✍ Thomas R. Fink; Donald M. Crothers 📂 Article 📅 1968 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 427 KB 👁 1 views

## S ynposis Random number methods are used to calculate helix-coil transition curves for the model of a heterogeneous polypeptide of random sequence. These curves are compared with several other calculations. The random number computations confirm the exact calculation of Lehman; among the severa