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First observation of an .alpha.-helix in .alpha.,.beta.-dehydrooligopeptides: Crystal structure of Boc-Val-.DELTA.Phe-Ala-Leu-Gly-OMe.

✍ Scribed by Rajashankar, K. R.; Ramakumar, S.; Jain, R. M.; Chauhan, V. S.

Book ID: 126884759
Publisher: American Chemical Society
Year: 1995
Tongue: English
Weight: 289 KB
Volume: 117
Category: Article
ISSN: 0002-7863
DOI: 10.1021/ja00145a031

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## Abstract The peptide Boc‐Val^1^‐ΔPhe^2^‐Leu^3^‐Ala^4^‐ΔPhe^5^‐Ala^6^‐OMe has been examined for the structural consequence of placing a two‐residue segment between the ΔPhe residues. The peptide is stabilized by four consecutive β‐turns. The overall conformation of the molecule is a right‐handed