1.8.3.6 FAD FAD is tightly, but non-covalently, bound to S-farnesyl-L-cysteine lyase and is required for activity. The addition of excess FAD to the reaction enhances the S-farnesyl-L-cysteine lyase reaction by 30% 710018 1.8.3.6 FAD required for activity, FC lyase is a flavoprotein 710018