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Chain conformation of poly-L-alanine in dichloroacetic acid

✍ Scribed by Akio Nakajima; Masahiko Murakami

Publisher
Wiley (John Wiley & Sons)
Year
1972
Tongue
English
Weight
451 KB
Volume
11
Category
Article
ISSN
0006-3525

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✦ Synopsis

The chain conformation of poly-Lalanine in dichloroacetic acid has been investigated by combining experimental data on optical rotatory dispersions, intrinsic viscosities, and sedimentation equilibria. Comparison of experimentally obtained characteristic ratio with that predicted from theory leads to the conclusion that poly-Lalanine molecules exist as interrupted helices in dichloroacetic acid.

📜 SIMILAR VOLUMES

Conformational aspects of polypeptides.
Conformational aspects of polypeptides. XXIV. Conformational energies of poly-N-methyl-L-alanine chains
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Conformational energies of the poly-N-methyl-halanine chain have been calculated as a function of the rotational angles of its skeletal bonds, taking into account torsional potentials, van der Waals repulsions, and London attractions. Four pronounced minima in the energy were found; the relative mag

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High-resolution nuclear magnetic resonance spectra at 100 MHz have been obtained on poly-iV-methyl-L-alanine in the chloroform-trifluoroacetic acid system under various conditions of solvent composition. Different spectra are observed for the CH,-C,, C,-H, and N-CHI protons. On the basis of conforma

Helix–coil transition of poly(γ-benzyl-L
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## Abstract The thermal helix–coil transition of four samples of poly(γ‐benzyl‐L‐glutamate) in the dioxane–dichloroacetic acid (DCA) mixture was studied by optical rotatory dispersion method. The transition occurred at very high DCA content (97.5% by weight) in this system. The transition parameter