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- W1998758601 abstract "The conformational behaviour of host-guest peptides of the type Ac-Ala-Xxx-Ala-Ala-Xxx-Ala-Ala-Xxx-Ala-Ala-NH-PEGM (Xxx =α-aminoisobutyric acid (Aib), (S)-2-ethylalanine ((S)-Iva). (S)-2-methyiserine ((S)-α-MeSer)) has been studied by CD spectroscopy in CF3CH2OH. CH3OH. and water and by i.r. spectroscopy in CHCl3 and in the solid state. In this way the relative helix-inducing potential of the two chiral α-methyl-α-amino acids (S)-Iva and (S)-α-MeSer could be established in comparison to the strong helix-former Aib. The results show that (S)-Iva exerts a comparable helix-inducing effect as Aib, making this amino acid a valuable complementary tool for the stabilization or induction of helices. No significant helix-promoting effect was observed for (S)-α-MeSer in polar solvents; however, the i.r.-spectroscopic data in CHCl3 and in the solid state point to a helical conformation under these conditions. Possible reasons for the different behaviour of (S)-Iva and (S)-α-MeSer are briefly discussed." @default.
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- W1998758601 date "2009-01-12" @default.
- W1998758601 modified "2023-09-27" @default.
- W1998758601 title "Conformational studies on host-guest peptides containing chiral α-methyl-α-amino acids" @default.
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- W1998758601 doi "https://doi.org/10.1111/j.1399-3011.1988.tb01269.x" @default.
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