The amount of a DNA-directed RNA polymerases I, II, and III subunit RPABC4 (human) when measured in cerebrospinal fluid. The trait is level of DNA-directed RNA polymerases I, II, and III subunit RPABC4 (human) in cerebrospinal fluid (OBA_2058115, an Ontology of Biological Attributes identifier). Also known as: cerebrospinal fluid DNA-directed RNA polymerases I, II, and III subunit RPABC4 (human) amount.