The amount of a isopentenyl-diphosphate Delta-isomerase 1 (human) when measured in cerebrospinal fluid. The trait is Ontology of Biological Attributes entry OBA_2058744 (level of isopentenyl-diphosphate Delta-isomerase 1 (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid isopentenyl-diphosphate Delta-isomerase 1 (human) amount.