Ontology of Biological Attributes term OBA_2059177 (level of protein phosphatase 1 regulatory subunit 29 (human) in cerebrospinal fluid) is the amount of a protein phosphatase 1 regulatory subunit 29 (human) when measured in cerebrospinal fluid. Also known as: cerebrospinal fluid protein phosphatase 1 regulatory subunit 29 (human) amount.