The amount of a cytochrome c oxidase subunit 4 isoform 2, mitochondrial (human) when measured in cerebrospinal fluid. The trait is OBA_2080454 (level of cytochrome c oxidase subunit 4 isoform 2, mitochondrial (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid cytochrome c oxidase subunit 4 isoform 2, mitochondrial (human) amount.