Figure 1.

Overview of Isoprenoid Biosynthesis by Compartment in a Higher Plant Cell.

Indicated are the IPP and DMAPP requirements for various classes of isoprenoids. AcCoA, acetyl-CoA; FPP, farnesyl diphosphate; GPP, geranyl diphosphate; GGPP, geranylgeranyl diphosphate; G3P, glyceraldehyde 3-phosphate; MEP, methylerythritol phosphate pathway; MVA, mevalonate pathway; OPP, diphosphate moiety. The block arrows denote multiple steps, and the asymmetric arrows reflect the expected equilibrium of the reversible IPP isomerase (IDI) reaction.