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  • Title: Interactions of the cholesterol side-chain with egg lecithin. A spin label study.
    Author: Suckling KE, Boyd GS.
    Journal: Biochim Biophys Acta; 1976 Jun 17; 436(2):295-300. PubMed ID: 179595.
    Abstract:
    The effect in egg lecithin liposomes of cholesterol and cholesterol analogues with side-chains of reduced length on the order parameters of two steroid spin labels has been studied. Analogues with side-chains shorter than cholesterol by more than three carbon cause significantly less ordering than cholesterol. Liposomes containing a cholesterol analogue in which the side-chain is absent cause very little increase in the ordering of a new sterol spin label in which the nitroxide is incorporated into the side-chain. The results suggest that the sterol side-chain exerts a great influence on membrane rigidity within its immediate environment.
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