The amount of a N-terminal Xaa-Pro-Lys N-methyltransferase 1 (human) when measured in cerebrospinal fluid. The trait is Ontology of Biological Attributes id OBA_2080739 (level of N-terminal Xaa-Pro-Lys N-methyltransferase 1 (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid N-terminal Xaa-Pro-Lys N-methyltransferase 1 (human) amount.