Abstract
The crystal structure of the complex between poly(γ-methyl L-glutamate) (PMLG) and chloroform was studied by X-ray diffraction method. The PMLG main chain takes the right-handed α-helical conformation, which is identical with that of the dry form. The unit cell of the complex is hexagonal with lattice dimensions a=12.75 Å and c (fiber axis)=26.9 Å, and contains eighteen amino-acid residues and about three molecules of chloroform. The complex assumes a statistically disordered structure, where up and down helices are distributed randomly among the lattice sites, and molecules of chloroform locate favorably between antiparallel helices. The side-chain conformation is rather contracted.
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Sasaki, S., Takigawa, S. Structure of the Crystalline Complex between Poly-(γ-methyl L-glutamate) and Chloroform. Polym J 19, 1081–1090 (1987). https://doi.org/10.1295/polymj.19.1081
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DOI: https://doi.org/10.1295/polymj.19.1081