ENTPD4 is a symbol for the gene, Ectonucleoside triphosphate diphosphohydrolase 4, in humans. Other names include: NTPDase 4; Lysosomal apyrase-like protein of 70 kDa; Uridine-diphosphatase; UDPase; LALP70; LAP70; LYSAL1; NTPDase-4. The encoded protein is an enzyme with an amino acid length of 616 and a mass of 70.3 kDa. Other isoforms may exist. ENTPD4 is a member of the GDA1/CD39 NTPase family. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog, Chicken.