Diphosphoinositol polyphosphate phosphohydrolase DDP1 (EC 3.6.1.52) (Diadenosine 5',5'''-P1,P6-hexaphosphate hydrolase) (Ap6A hydrolase) (Diadenosine and diphosphoinositol polyphosphate phosphohydrolase 1) (Diadenosine hexaphosphate hydrolase (AMP-forming)) (EC 3.6.1.60) (Endopolyphosphatase) (EC 3.6.1.10)