The amount of a mitogen-activated protein kinase kinase kinase kinase 3 (human) when measured in cerebrospinal fluid. The trait is Ontology of Biological Attributes identifier OBA_2059667 (level of mitogen-activated protein kinase kinase kinase kinase 3 (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid mitogen-activated protein kinase kinase kinase kinase 3 (human) amount.