alpha-glucosidase , beta-glucosidase and beta-galactosidase were studied in cell-free amniotic fluid samples using corresponding 4-methylumbelliferyl-glycosides and a series of disaccharides ( maltose , sucrose , trehalose , turanose , cellobiose , gentiobiose and lactose ) as substrates .
C0012611
disaccharides
C0038636
sucrose