Ontology of Biological Attributes term OBA_2057806 (level of isoleucine--tRNA ligase, cytoplasmic (human) in cerebrospinal fluid) is the amount of a isoleucine--tRNA ligase, cytoplasmic (human) when measured in cerebrospinal fluid. Also known as: cerebrospinal fluid isoleucine--tRNA ligase, cytoplasmic (human) amount.