The amount of a proto-oncogene tyrosine-protein kinase Src (human) when measured in cerebrospinal fluid. The trait is Ontology of Biological Attributes term OBA_2057105 (level of proto-oncogene tyrosine-protein kinase Src (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid proto-oncogene tyrosine-protein kinase Src (human) amount.