Ether linkage Phytanyl H2C-O-( H. Phytanyl植烷is composed Hc-O-c of 4 linked isoprenes H2COPO32- CH3 (a)Glycerol groups diether Isoprene unit Biphytanyl H2C-0- HOCH2 HC-O-C C-O-CH H2COPO32- C-O-CH2 (b)Diglycerol tetraether Copyright2009 Pearson Education,Inc.,publishing as Pearson Benjamin Cummings. Glycerol diethers and diglycerol tetraethers are the major classes of lipids present in Archaea.In the tetraether molecule the phytanyl(composed of 4 linked isoprenes)side chains from each glycerol molecule are covalently bonded together..甘油二醚与二甘油四醚是古生菌的主要脂类.四醚中的植烷（由四个 异戊二烯组成)与甘油共价连接Glycerol diethers and diglycerol tetraethers are the major classes of lipids present in Archaea. In the tetraether molecule the phytanyl (composed of 4 linked isoprenes) side chains from each glycerol molecule are covalently bonded together. 甘油二醚与二甘油四醚是古生菌的主要脂类. 四醚中的植烷(由四个 异戊二烯组成)与甘油共价连接 Phytanyl植烷is composed of 4 linked isoprenes