The amount of a osteopetrosis-associated transmembrane protein 1 (human) when measured in cerebrospinal fluid. The trait is Ontology of Biological Attributes entry OBA_2059604 (level of osteopetrosis-associated transmembrane protein 1 (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid osteopetrosis-associated transmembrane protein 1 (human) amount.