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X-ray diffraction studies of the conformation of polymer molecules in solution. II. Poly-3,5-dibromotyrosine

✍ Scribed by George W. Brady; R. Salovey; J. M. Reddy

Book ID: 102760155
Publisher: Wiley (John Wiley & Sons)
Year: 1965
Tongue: English
Weight: 547 KB
Volume: 3
Category: Article
ISSN: 0006-3525
DOI: 10.1002/bip.1965.360030508

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✦ Synopsis

Synopsis

X-ray diffraction patterns from dilute solutions of poly-3,5-dibromo-~tyrosine in dirnethylformamide and equivalent concentrations of 2,&dibromophenol in the same solvent are compared. The intensity difference as a function of scattering angle is indicative of the arrangement of residues in the polymer. A novel averaging procedure is used to compute the intensity patterns arising from regular arrays of bromine atoms. Interbromine spacings measured on a Drieding model of a right-handed a-helii with side groups restricted to rigid positions of maximum stagger give moderate agreement with experiment. Very good agreement with observations is obtained by allowing for a small oscillation of phenyl rings which effectively cancels out the contribution of large distances to the intensity curve.

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