The amount of a potassium voltage-gated channel subfamily E regulatory beta subunit 5 (human) when measured in cerebrospinal fluid. The trait is level of potassium voltage-gated channel subfamily E regulatory beta subunit 5 (human) in cerebrospinal fluid (OBA_2081549, an Ontology of Biological Attributes entry). Also known as: cerebrospinal fluid potassium voltage-gated channel subfamily E regulatory beta subunit 5 (human) amount.