bis(5'-nucleosyl)-tetraphosphatase activity bis(5'-nucleosyl)-tetraphosphatase (symmetrical) activity https://github.com/geneontology/go-ontology/issues/30193 dinucleosidetetraphosphatase (symmetrical) activity molecular_function diadenosine 5',5'''-P1,P4-tetraphosphate pyrophosphohydrolase activity diadenosinetetraphosphatase (symmetrical) activity GO:0008803 diadenosine tetraphosphate hydrolase activity dinucleosidetetraphosphate (symmetrical) diadenosine 5',5'''-P(1),P(4)-tetraphosphate pyrophosphohydrolase activity P1,P4-bis(5'-nucleosyl)-tetraphosphate nucleosidebisphosphohydrolase activity diadenosine 5',5'''-P1,P4-tetraphosphatase activity symmetrical diadenosine tetraphosphate hydrolase activity EC:3.6.1.41 RHEA:24252 diadenosine tetraphosphatase (symmetrical) bis(5'-adenosyl) tetraphosphatase activity 1-P,4-P-bis(5'-nucleosyl)-tetraphosphate nucleosidebisphosphohydrolase activity KEGG_REACTION:R00125 diadenosine polyphosphate hydrolase activity adenosine tetraphosphate phosphodiesterase activity Ap(4)A hydrolase activity MetaCyc:3.6.1.41-RXN Ap4A hydrolase activity Catalysis of the reaction: P(1),P(4)-bis(5'-adenosyl) tetraphosphate + H2O = 2 ADP + 2 H+.