hydrolase activity, hydrolyzing O-glycosyl compounds polygalacturonase activity https://github.com/geneontology/go-ontology/issues/30193 endopolygalacturonase activity MetaCyc:RXN-2103 pectolase activity pectinase activity EC:3.2.1.15 pectin depolymerase activity GO:0004650 Catalysis of the random hydrolysis of (1->4)-alpha-D-galactosiduronic linkages in pectate and other galacturonans. endogalacturonase activity pectin polygalacturonase activity molecular_function poly-alpha-1,4-galacturonide glycanohydrolase activity pectin hydrolase activity poly(1,4-alpha-D-galacturonide) glycanohydrolase activity endo-D-galacturonase activity endo-polygalacturonase activity