The amount of a amyloid beta precursor protein binding family B member 1 (human) when measured in cerebrospinal fluid. The trait is Ontology of Biological Attributes entry OBA_2055914 (level of amyloid beta precursor protein binding family B member 1 (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid amyloid beta precursor protein binding family B member 1 (human) amount.