The amount of a HLA class I histocompatibility antigen, alpha chain E (human) when measured in cerebrospinal fluid. The trait is Ontology of Biological Attributes term OBA_2057127 (level of HLA class I histocompatibility antigen, alpha chain E (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid HLA class I histocompatibility antigen, alpha chain E (human) amount.