Changes in fluidity and 22 6n 3 content in phospholipids of trout salmo gairdneri intestinal brush border membrane as related to environmental salinity
Leray, C.; Chapelle, S.; Duportail, G.; Florentz, A.
Biochimica et Biophysica Acta 778(2): 233-238
ISSN/ISBN: 0005-2728 Accession: 004907894
Phospholipids and fatty acid analyses were carried out brush-border membranes isolated from trout intestine. Phosphatidylcholine (PC) is the principal phospholipid of these membranes. When animals are transferred from fresh water to sea water, the content of the 22:6(n-3) fatty acid strongly increases at the level of phospolipids, mainly PC. An important increase in the fluidity of the lipid core of the membrane was detected by steady-state fluorescence anisotropy. The molecular species of PC (especially rich in n-3 fatty acids) may play an important part in marine organisms according to the osmoregulation problems met in these animals.