The amount of a serine/threonine-protein kinase MRCK beta (human) when measured in cerebrospinal fluid. The trait is Ontology of Biological Attributes entry OBA_2081850 (level of serine/threonine-protein kinase MRCK beta (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid serine/threonine-protein kinase MRCK beta (human) amount.