The amount of a ubiquitin-like domain-containing CTD phosphatase 1 (human) when measured in cerebrospinal fluid. The trait is level of ubiquitin-like domain-containing CTD phosphatase 1 (human) in cerebrospinal fluid (OBA_2080086). Also known as: cerebrospinal fluid ubiquitin-like domain-containing CTD phosphatase 1 (human) amount.