Nucleotidase which shows specific activity towards cytidine monophosphate (CMP) and 7-methylguanosine monophosphate (m(7)GMP) . CMP seems to be the preferred substrate .
Subcellular locations: Cytoplasm
Subcellular locations: Endoplasmic reticulum
Isoforms 1, 3 and 4 are expressed in reticulocytes. Isoform 4 is hardly detectable in bone marrow and fetal liver.