Ontology of Biological Attributes term OBA_2056671 (level of HLA class II histocompatibility antigen, DQ alpha 2 chain (human) in cerebrospinal fluid) is the amount of a HLA class II histocompatibility antigen, DQ alpha 2 chain (human) when measured in cerebrospinal fluid. Also known as: cerebrospinal fluid HLA class II histocompatibility antigen, DQ alpha 2 chain (human) amount.