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Freeze-fracture electron microscopy was applied to study membrane morphology in a phosphatidylethanolamine-deficient E. coli strain. For growth, this strain requires millimolar concentrations of specific divalent cations like Mg 2+ or Ca 2+ . These cations bring the bilayer to nonbilayer phase transition temperature of the lipids back to wild type levels by shifting the phase...
Abietic acid is a major component of the oleoresin synthesized by many conifers and constitutes a major class of environmental toxic compounds with potential health hazard to animal, including human, and plant life. Being an amphipathic molecule, the study of the influence of abietic acid on the structure of membranes would be important to get insight into the mechanism of toxic action of the molecule...
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