endopolyphosphatase activity https://github.com/geneontology/go-ontology/issues/30193 MetaCyc:ENDOPOLYPHOSPHATASE-RXN molecular_function polyphosphate polyphosphohydrolase activity Catalysis of the reaction: polyphosphate + n H2O = (n+1) oligophosphate. The product contains 4 or 5 phosphate residues. polyphosphatase activity metaphosphatase activity polymetaphosphatase activity EC:3.6.1.10 GO:0000298 polyphosphate depolymerase activity RHEA:22452 pyrophosphatase activity