The amount of a sarcoplasmic/endoplasmic reticulum calcium ATPase 3 (human) when measured in cerebrospinal fluid. The trait is level of sarcoplasmic/endoplasmic reticulum calcium ATPase 3 (human) in cerebrospinal fluid (OBA_2080230, an Ontology of Biological Attributes identifier). Also known as: cerebrospinal fluid sarcoplasmic/endoplasmic reticulum calcium ATPase 3 (human) amount.