LALP1 (lysosomal apyrase-like protein 1), also known as ENTPD7 (ectonucleoside triphosphate diphosphohydrolase 7), is a 604 amino acid multi-pass membrane protein that belongs to the GDA1/CD39 NTPase family. Preferentially hydrolyzing nucleoside 5??-triphosphates, LALP1 and has an order of activity with respect to possible substrates, which is UTP > GTP > CTP.