level of protein-lysine methyltransferase METTL21C (human) in cerebrospinal fluid (OBA_2059242, an Ontology of Biological Attributes identifier) is the amount of a protein-lysine methyltransferase METTL21C (human) when measured in cerebrospinal fluid. Also known as: cerebrospinal fluid protein-lysine methyltransferase METTL21C (human) amount.