Glyceryl 1-phosphate,(S)- or glycerol-1-phosphate is a glycerophosphate backbone of the archeal ether lipids. It results from the reduction of dihydroxyacetone phosphate using NADH (or NADPH) and divalent ions as cofactors. Two different enzymes carry out the condensation of the isoprenoid chains to the glycerophosphate backbone in archea. The first ether linkage that brings together glycerol-1-phosphate and geranylgeranyl diphosphate is catalyzed by a cytoplasmic protein geranylgeranylglyceryl diphosphate (GGGP) synthase.