The amount of a protein-L-isoaspartate(D-aspartate) O-methyltransferase (human) when measured in cerebrospinal fluid. The trait is level of protein-L-isoaspartate(D-aspartate) O-methyltransferase (human) in cerebrospinal fluid (OBA_2057405, an Ontology of Biological Attributes id). Also known as: cerebrospinal fluid protein-L-isoaspartate(D-aspartate) O-methyltransferase (human) amount.