The amount of a U11/U12 small nuclear ribonucleoprotein 25 kDa protein (human) when measured in cerebrospinal fluid. The trait is level of U11/U12 small nuclear ribonucleoprotein 25 kDa protein (human) in cerebrospinal fluid (OBA_2080740, an Ontology of Biological Attributes id). Also known as: cerebrospinal fluid U11/U12 small nuclear ribonucleoprotein 25 kDa protein (human) amount.