The amount of a Ras-related protein Rab-2A (human) when measured in cerebrospinal fluid. The trait is level of Ras-related protein Rab-2A (human) in cerebrospinal fluid (OBA_2058259, an Ontology of Biological Attributes term). Also known as: cerebrospinal fluid Ras-related protein Rab-2A (human) amount.