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. 1990 Mar 26;262(2):173-5.
doi: 10.1016/0014-5793(90)80182-i.

Does a 2----5 beta-turn structure exist in enkephalins? Study of a fully protected Leu-enkephalin in organic solution by 17O-NMR

E Moret  1 , I P Gerothanassis, R N Hunston, J Lauterwein
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Does a 2----5 beta-turn structure exist in enkephalins? Study of a fully protected Leu-enkephalin in organic solution by 17O-NMR

E Moret et al. FEBS Lett. .
Free article

Abstract

The 17O chemical shifts of the Gly-2 and Gly-3 oxygens of a fully protected Leu-enkephalin were measured to be identical in acetone solution. This allows the conclusion that neither of these peptide oxygens is hydrogen bonded and that no specific 2----5 beta-turn structure exists to an appreciable extent.

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