The amount of a heterogeneous nuclear ribonucleoproteins A2/B1 (human) when measured in cerebrospinal fluid. The trait is OBA_2057422 (level of heterogeneous nuclear ribonucleoproteins A2/B1 (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid heterogeneous nuclear ribonucleoproteins A2/B1 (human) amount.