cells with combined beta-galactosidase and neuraminidase deficiency contain only 0.3 pmol of beta-galactosidase/mg of protein with a decreased turnover time of 1 day and normal hydrolytic properties ( 200 nmol of 4-methylumbelliferyl galactoside/h pmol of beta-galactosidase ) .
C0016955
galactosidase
C0005220
beta-galactosidase