Optical anisotropy of polypeptide chains

✍ Scribed by R. T. Ingwall; P. J. Flory

• Publisher: Wiley (John Wiley & Sons)
• Year: 1972
• Tongue: English
• Weight: 700 KB
• Volume: 11
• Category: Article
• ISSN: 0006-3525
• DOI: 10.1002/bip.1972.360110715

✦ Synopsis

Optical anisotropies 7 2 of N-t-butylacetamide (tBA), N-methylacetamide (MA), and N,N-dimethylacetamide (DMA) have been determined from the Rayleigh ratios for depolarized scattering by dilute solutions of the amides in p-dioxane. Traceless optical polarizability tensors & for the amides are derived from these results in conjunction with the Kerr constant for tBA determined by LeFBvre and co-workers. It is shown that the tensor &for the glycyl unit in a polypeptide chain may be identified with &MA. Methods for deriving corresponding tensors for other peptide units are indicated and the traceless polarizability tensor & for a polypeptide chain in any specified configuration is formulated.