Ontology of Biological Attributes id OBA_2058438 (level of dual specificity calcium/calmodulin-dependent 3',5'-cyclic nucleotide phosphodiesterase 1B (human) in cerebrospinal fluid) is the amount of a dual specificity calcium/calmodulin-dependent 3',5'-cyclic nucleotide phosphodiesterase 1B (human) when measured in cerebrospinal fluid. Also known as: cerebrospinal fluid dual specificity calcium/calmodulin-dependent 3',5'-cyclic nucleotide phosphodiesterase 1B (human) amount.