The amount of a phosphatidylinositol 5-phosphate 4-kinase type-2 beta (human) when measured in cerebrospinal fluid. The trait is level of phosphatidylinositol 5-phosphate 4-kinase type-2 beta (human) in cerebrospinal fluid (Ontology of Biological Attributes id OBA_2058366). Also known as: cerebrospinal fluid phosphatidylinositol 5-phosphate 4-kinase type-2 beta (human) amount.