The amount of a putative peptidyl-tRNA hydrolase PTRHD1 (human) when measured in cerebrospinal fluid. The trait is level of putative peptidyl-tRNA hydrolase PTRHD1 (human) in cerebrospinal fluid (OBA_2059281, an Ontology of Biological Attributes term). Also known as: cerebrospinal fluid putative peptidyl-tRNA hydrolase PTRHD1 (human) amount.