The amount of a histone-lysine N-methyltransferase, H3 lysine-79 specific (human) when measured in cerebrospinal fluid. The trait is level of histone-lysine N-methyltransferase, H3 lysine-79 specific (human) in cerebrospinal fluid (OBA_2080034). Also known as: cerebrospinal fluid histone-lysine N-methyltransferase, H3 lysine-79 specific (human) amount.