The amount of a spliceosome RNA helicase DDX39B (human) when measured in cerebrospinal fluid. The trait is level of spliceosome RNA helicase DDX39B (human) in cerebrospinal fluid (OBA_2058736, an Ontology of Biological Attributes entry). Also known as: cerebrospinal fluid spliceosome RNA helicase DDX39B (human) amount.