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| Titel: |
Interaction of Zn2 Ions with Phospholipid Multilayers |
| Auteur: |
Suwalsky, Mario Ungerer, Brigitte Aguilar, Felipe Sotomayor, Carlos P. |
| Verschenen in: |
International journal of polymeric materials |
| Paginering: | Jaargang 34 (1996) nr. 3-4 pagina's 225-232 |
| Jaar: |
1996-12-01 |
| Inhoud: |
Phospholipids are large natural amphipathic molecules which, in contact with water, assemble into higher molecular aggregates. The most relevant one is the bilayer for its relation to the structure, properties and functions of cell membranes. Given their structural complexity phospholipid bilayers are usually used as models for studying how biologically relevant chemicals affect the structure and functions of biomembranes. Zn is a trace element essential for the functional integrity of cell membranes. It is also a common contaminant of sea waters. Therefore, it was thought of interest to study the interaction of Zn2- ions with phospholipid bilayers in order to understand the way they interact with cell membranes. With this aim Zn2+, in a wide range of concentrations, was made to interact with multibilayers of the phospholipids dimyristoylphosphatidylcholine (DMPC) and dimyristoylphosphatidylethanolamine (DMPE). This study was performed by X-ray diffraction. Besides, the interaction of Zn2+ with DMPC liposomes was studied by fluorescence spectroscopy. The results showed that indeed Zn2+ interacted with both phospholipids. As its concentration increased it produced first a disorder effect which was reversed at higher concentrations. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 6 van 15 gevonden artikelen
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