The determination of the thermodynamic parameter of the helix‐coil transition of polypeptides by means of dipole moment measurements | Zendy

Dufour C. | Zendy; Marchal E. | Zendy

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The determination of the thermodynamic parameter of the helix‐coil transition of polypeptides by means of dipole moment measurements

Author(s) -

Dufour C.,

Marchal E.

Publication year - 1972

Publication title -

biopolymers

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.556

H-Index - 125

eISSN - 1097-0282

pISSN - 0006-3525

DOI - 10.1002/bip.1972.360110507

Subject(s) - helix (gastropod) , chemistry , dipole , enthalpy , moment (physics) , electromagnetic coil , thermodynamics , transition dipole moment , solvent , crystallography , physics , organic chemistry , classical mechanics , quantum mechanics , ecology , snail , biology

The theoretical change of the mean‐square dipole moment of a polypeptide during the helix‐coil transition is compared with the change in helix content. It is shown that, according to the theory, the determination of the helix initiation parameter σ and the enthalpy of helix formation Δ H can be determined. Experimental data on poly‐benzyl‐ L ‐gluatamate in two different solvent mixtures are given.

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