catalytic activity:Nucleoside 2,3-cyclic phosphate + H(2)O = nucleoside 2-phosphate.,similarity:Belongs to the cyclic nucleotide phosphodiesterase family.,subcellular location:Firmly bound to membrane structures of brain white matter. Identified by mass spectrometry in melanosome fractions from stage I to stage IV.,catalytic activity:Nucleoside 2,3-cyclic phosphate + H(2)O = nucleoside 2-phosphate.,similarity:Belongs to the cyclic nucleotide phosphodiesterase family.,subcellular location:Firmly bound to membrane structures of brain white matter. Identified by mass spectrometry in melanosome fractions from stage I to stage IV.,