Precise structural analysis of α-helical poly(l-alanine) by quantum chemical calculation
✍ Scribed by Akira Shoji; Hiroyuki Souma; Takuo Ozaki; Hiromichi Kurosu; Isao Ando; Stefan Berger
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 307 KB
- Volume
- 889
- Category
- Article
- ISSN
- 0022-2860
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Polarized ir spectra of oriented films of ␣-helical poly(L-alanine) (␣-PLA) have been obtained as a function of residual solvent dichloroacetic acid (DCA). The amide A, B, II, and V regions exhibit multiple bands whose structure depends on the residual DCA content, and those associated with the ␣ I
Analyses of 13C chemical shielding tensors for powder samples of a-helix-rich poly-L-alanine (pALA) and the mechanically stretched b-sheet pALA Ðlms were performed by solid-state two-dimensional spin-echo (2DSE) NMR spectroscopy. From the iterative Ðtting of 2DSE spectra with spectrum simulations, i