The amount of a lymphocyte antigen 6 complex locus protein G6c (human) when measured in cerebrospinal fluid. The trait is level of lymphocyte antigen 6 complex locus protein G6c (human) in cerebrospinal fluid (Ontology of Biological Attributes id OBA_2056556). Also known as: cerebrospinal fluid lymphocyte antigen 6 complex locus protein G6c (human) amount.