caa a22 4500 46576651X CHVBK 20180323111915.0 cr unu---uuuuu 170327e19900801xx s 000 0 eng 10.1007/BF02538086 doi (NATIONALLICENCE)springer-10.1007/BF02538086 Phospholipid and fatty acid composition of frog ( Rana esculenta ) liver—a circannual study [Elektronische Daten] [S. Scapin, P. Baldini, P. Luly] Liver lipid composition of the frogRana esculenta was examined on a circannual basis. In particular, phospholipid and cholesterol content, relative phospholipid distribution, and fatty acid patterns have been studied. Seasonal acclimatization is associated with significant modifications of phospholipid content and of the relative proportion of phospholipid classes, while cholesterol level is unchanged throughout the year. In regard to the fatty acid composition of total phospholipids as well as of the four major phospholipid classes—phosphatidylcholine (PC); phosphatidylethanolamine (PE); sphingomyelin (SM); phosphatidylserine (PS)—it appears that the liver of "summer animals” is characterized by a higher unsaturation index due to a decrease of saturated fatty acids and to an increased content of n−3 and n−6 polyunsaturated fatty acids. The results suggest that relevant compositional changes occur mainly in spring and autumn: these changes could be interpreted as being the result of both a nutritionally- and thermally-induced seasonal adaptation directed toward the preservation of membrane-associated physiological activities that are linked to the transition from the active to the inactive state of the animal. American Oil Chemists' Society (AOCS), 1990 Scapin S. Department of Cellular and Developmental Biology, University of Rome "La Sapienza”, 00185, Rome, Italy aut Baldini P. Department of Biology, University of Rome "Tor Vergata”, 00173, Rome, Italy aut Luly P. Department of Biology, University of Rome "Tor Vergata”, 00173, Rome, Italy aut Lipids Springer-Verlag 25/8(1990-08-01), 443-449 0024-4201 25:8<443 1990 25 11745 https://doi.org/10.1007/BF02538086 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02538086 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Scapin S. Department of Cellular and Developmental Biology, University of Rome "La Sapienza”, 00185, Rome, Italy aut NATIONALLICENCE 700 1- Baldini P. Department of Biology, University of Rome "Tor Vergata”, 00173, Rome, Italy aut NATIONALLICENCE 700 1- Luly P. Department of Biology, University of Rome "Tor Vergata”, 00173, Rome, Italy aut NATIONALLICENCE 773 0- Lipids Springer-Verlag 25/8(1990-08-01), 443-449 0024-4201 25:8<443 1990 25 11745 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer