Solid state 2H NMR study of racemic poly(γ-benzyl glutamate)
✍ Scribed by So Kitazawa; Toshifumi Hiraoki; Akihiro Tsutsumi
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 540 KB
- Volume
- 355
- Category
- Article
- ISSN
- 0022-2860
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## Abstract The helix–random‐coil transition process for poly‐γ‐benzyl‐L‐glutamate (PBG) in solvent mixtures trifluoroacetic acid/deuterochloroform (TFA/CDCl~3~) at different temperatures has been studied by nmr. The chemical shift behavior of the α‐CH resonances of the peptide chain and of the TFA
## Abstract Several modification of the arrangements of α‐helical molecules were found in the solid films of poly (γ‐ethyl‐L‐glutamate), depending on the casting solvent and the temperature. The helical conformation is somewhat looser than the normal 18‐residue, 5‐turn α‐helix. Using x‐ray diffract
## Abstract The helix–coil conformational transition undergone by poly(γ‐benzyl‐L‐glutamate) in solutions of trifluoroacetic acid and deuterated chloroform was studied by proton and carbon‐13 nmr. The results indicate that in the case of the solvent‐induced helix–coil transition, the side chain ass