Function
Mediates the hydrolysis of some nucleoside diphosphate derivatives. Can use diadenosine 5',5'''-P(1)P(6) hexaphosphate (Ap(6)A), diadenosine 5',5'''-P(1)P(5) pentaphosphate (Ap(5)A) and adenosine tetraphosphate (p(4)A) as substrates, but not diadenosine 5',5'''-P(1)P(4) tetraphosphate (Ap(4)A), diadenosine 5',5'''-P(1)P(3) triphosphate (Ap(3)A), deoxyribonucleoside triphosphates, ribonucleoside triphosphates, diphosphoinositol pentakisphosphate (PP-InsP(5)) and 5-phospho-alpha-D-ribosyl diphosphate (PRPP).