Isolation and Characterization of β-N-Acetylglucosaminidase from Human Parotid Saliva

Abstract
Beta-N-acetylglucosaminidase in human parotid saliva was separated into two subfractions by diethylaminoethanol cellulose column chromatography. One subfraction of the enzyme was isolated and purified. Disk electrophoresis showed that the purified enzyme was homogeneous. The molecular weight of this enzyme was estimated to be about 153,000 by gel filtration and dodecyl sulfate polyacrylamide gel electrophoresis. N-acetyl-β-galactosaminides also were hydrolyzed by this enzyme at the same site.