The amount of a 5-formyltetrahydrofolate cyclo-ligase (human) when measured in cerebrospinal fluid. The trait is OBA_2057991 (level of 5-formyltetrahydrofolate cyclo-ligase (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid 5-formyltetrahydrofolate cyclo-ligase (human) amount.