Partial purification of beta-N-acetylhexosaminidase A by affinity chromatography

Purification of some glycoside hydrolases by affinity chromatography

Two glycoproteins have been isolated from the cell walls of baker's yeast. One is a glucan-protein complex which has been partially characterised as having a branched carbohydrate structure composed of chains of (1 leads to 3)-linked beta-D-glucosyl residues, some of which are attached by (1 leads to 6)-linkages to the main chain. Immobilization of this glycoprotein was achieved by covalent attachment to Sepharose, and the product was used to isolate a number of (1 leads to 3)-beta-D-glucan hydrolases from Helix pomatia, malted barley, and Basidiomycete QM806. The second glycoprotein, a mannan-protein complex, after immobilization, has been used in the purification of an alpha-D-mannosidase from jack-bean meal.

Immunoaffinity chromatography of human beta-hexosaminidase A

A highly specific method for the purification of human beta-hexosaminidase A employing immunoaffinity chromatography is described. Using an antiserum against the unique antigenic determinant, alpha, of beta-hexosaminidase A, and elution with 8.0M urea, a 283-or 417-fold purification of the enzyme was obtained in a single step from crude human placental homogenate.