Does arachidonic acid exist in a well defined tertiary structure ?

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Abstract

2d n.O.e. experiments as well as 1H and 13C relaxation time measurements force one to assume that arachidonic acid in solution exists at least partially in a backfolded tightly packed structure. Thereby in CDCl3 this packed structure is most favored, whereas in CD3OD it seems to be of no valuable importance. Force field calculations performed on the same subject end up with four minima on the potential energy surface. One of those minima is well suited to explain the nmr results solely on basis of the r−6 dependence of intramolecular dipolar relaxation.

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