Polygalacturonase has the same substrate specificity as pectate lyase. This enzyme is produced by Erwinia carotovora subspp. but not by Erwinia chyrsanthemi.

与果胶酸裂解酶的底物相同。胡软欧氏菌的多个亚种产生此酶，但菊欧氏菌不产生。