2.5.1.41 geranylgeranyl diphosphate + sn-glycerol 1-phosphate - 2.5.1.41 geranylgeranyl diphosphate + sn-glycerol 1-phosphate first committed step in the biosynthetic pathway of glycerol dibiphytanyl glycerol tetraethers, the membrane lipids of the thermophilic and acidophilic euryarchaeota 2.5.1.41 additional information probably involved in the biosynthesis of membrane lipids in archaebacteriae