Липид: Разлика между версии
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=== Стеролови липиди ===
Стероловите липиди, като [[холестерол]]ът и неговите производни, са важен компонент на мембранните липиди,{{hrf|Bach|2003|187 – 197}} наред с глицерофосфолипидите и сфингомиелините. [[Стероид]]ите, производни на една и съща четирипръстенна ядрова структура, имат различни биологични функции като [[хормон]]и и сигнални молекули. Осемнадесетвъглеродните (C18) стероиди образуват семейството на [[естроген]]а, а C19 стероидите включват [[андроген]]ите, като [[тестостерон]] и [[андростерон]]. Подгрупата C21 включва [[прогестоген]]ите, както и [[глюкокортикоид]]ите и [[минералокортикоид]]ите.{{hrf|Stryer|2007|749}} [[Секостероид]]ите, включващи различни форми на [[витамин D]], се характеризират с празнина в B-пръстена на ядровата структура.{{hrf|Bouillon|2006|627 – 645}} Други примери за [[стерол]]и са [[Жлъчна киселина|жлъчните киселини]] и техните производни,{{hrf|Russell|2003|137 – 174}} които при [[бозайници]]те представляват оксидирани производни на холестерола и се синтезират в [[Черен дроб|черния дроб]]. [[Растения|Растителните]] им еквиваленти са [[фитостерол]]ите, като [[бета-ситостерол]], [[стигмастерол]] и [[брасикастерол]]. Последното съединение се използва като [[биомаркер]] за растежа на [[алги]].{{hrf|Villinski|2008|567 – 588}} Преобладаващият стерол в клетъчните мембрани на [[гъби]]те е [[ергостерол]]ът.{{hrf|Deacon|2005|567 – 588}}
=== Пренолови липиди ===
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