Hydrolysis of the GGR reaction product from GGPP. Radiolabeled GGPP and GGPP reduced with S. acidocaldarius GGR were hydrolyzed by acid or phosphatase treatment and then analyzed by normal-phase TLC developed with 2-propanol-aqueous NH4OH-H2O (6/3/1). Lane 1, untreated GGPP; lane 2, acid-treated GGPP; lane 3, phosphatase-treated GGPP; lane 4, untreated GGR product from GGPP; lane 5, acid-treated GGR product from GGPP; lane 6, phosphatase-treated GGR product from GGPP. s.f., solvent front; ori., origin.