The amount of a ubiquitin-like modifier-activating enzyme 6 (human) when measured in cerebrospinal fluid. The trait is level of ubiquitin-like modifier-activating enzyme 6 (human) in cerebrospinal fluid (Ontology of Biological Attributes identifier OBA_2055826). Also known as: cerebrospinal fluid ubiquitin-like modifier-activating enzyme 6 (human) amount.