1.8.3.5 S-(2E,6E)-farnesyl-L-cysteine + O2 + H2O the enzyme exhibits specificity for farnesyl-L-cysteine over geranylgeranyl-L-cysteine 1.8.3.5 S-prenyl-L-cysteine + O2 + H2O kinetic mechanism, enzyme transfers the pro-S hydride of the farnesylcysteine to FAD 1.8.3.5 S-prenyl-L-cysteine + O2 + H2O physiologic role in cleaving prenylcysteines in mammals, cleaves the thioether bond of prenylcysteines to yield free cysteine and the aldehyde of the isoprenoid lipid