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Proc.Nati.Acad.Sci.USAVol.91,pp.8234-8238,August1994BiochemistryStructuralorderofmembranesandcompositionofphospholipidsinfishbraincellsduringthermalacclimatization(temperatureadaptation/membranefluidity/fattyadds)CSABABUDA*,INDRANILDEY*,NANDORBALOGHt,LASZLOI.HORVATHt,KATALINMADERSPACH*,MIKLOSJUHASZt,YOUNGK.YEO*§,ANDTIBORFARKAS*$*InstituteofBiochemistryandtInstituteofBiophysics,BiologicalResearchCenter,HungarianAcademyofSciences,Szeged,Hungary;and$InstituteofBiochemistry,J6zsefAttilaUniversity,Szeged,HungaryContributedbyTiborFarkas,May6,1994ABSTRACTAcomparisonofthestructuralordersofmembranesofamixedbrain-cellpopulationisolatedfromCyprinuscarpioL.acclimatedtoeithersummer(23-250C)orwinter(50C)revealedahighdegreeofcompensation(80%)fortemperature,asassayedbyelectronspinresonancespectros-copy.Thecellsrapidlyforgettheirthermalhistoryandadjustthephysicalpropertiesofthemembraneswhenshiftedtotheotherextremeoftemperatureeitherinvivoorinvitro.Phos-pholipidsseparatedfrombothtypesofanimalsexhibitonl...