Disaccharide-specific acuminosidase, hydrolyzes the beta-glycosidic bond between p-allylphenol and acuminose with retention of anomeric configuration. Has highest activity towards furcatin, and lower activity towards beta-primeverosides and beta-vicianoside. Has very low activity towards beta-gentobiosides. 7-[beta-D-apiofuranosyl-(1->6)-beta-D-glucopyranosyloxy]isoflavonoid + H2O = a 7-hydroxyisoflavonoid + beta-D-apiofuranosyl-(1->6)-D-glucose. Optimum pH is 5.0. Active between pH 4.0 and 10.0. Optimum temperature is 40 degrees Celsius. Stable below 50 degrees Celsius. Expressed in young and mature leaves, but not in fruit and stem. Belongs to the glycosyl hydrolase 1 family.