The amount of a histone-lysine N-methyltransferase EZH2 (human) when measured in cerebrospinal fluid. The trait is level of histone-lysine N-methyltransferase EZH2 (human) in cerebrospinal fluid (OBA_2058966, an Ontology of Biological Attributes entry). Also known as: cerebrospinal fluid histone-lysine N-methyltransferase EZH2 (human) amount.