Diadenosine hexaphosphate hydrolase (AMP-forming) Diadenosine hexaphosphate hydrolase (ATP-forming) Ap4A Bis(5'-nucleosyl)-tetraphosphatase (symmetrical) Bis(5'-adenosyl)-triphosphatase ATP adenylyltransferase NUDT2 Bis(5'-nucleosyl)-tetraphosphatase (asymmetrical) NUDT3 NUDT4 NUDT11 FHIT CBS domain Aprataxin HINT1 KARS (gene) Microphthalmia-associated transcription factor Ectonucleotide pyrophosphatase/phosphodiesterase 1 Janet Thornton Dry eye syndrome List of EC numbers (EC 3) Glycine—tRNA ligase MAPK1