level of DNA-directed RNA polymerase II subunit RPB9 (human) in cerebrospinal fluid (OBA_2057743, an Ontology of Biological Attributes identifier) is the amount of a DNA-directed RNA polymerase II subunit RPB9 (human) when measured in cerebrospinal fluid. Also known as: cerebrospinal fluid DNA-directed RNA polymerase II subunit RPB9 (human) amount.