3.4.23.18	glycoprotein	1-2%	30567	
3.4.23.18	glycoprotein	80.5% (enzyme form M1), 52.5% (enzyme form M2)	30575	
3.4.23.18	glycoprotein	carbohydrate content: less than 0.3% (enzyme form A2), about 50% (enzyme form A1)	30569	
3.4.23.18	proteolytic modification	the enzyme is synthesized as pro-enzyme	-, 668812	
3.4.23.18	proteolytic modification	the secreted enzyme has a pro-sequence, and is processed pH-dependently at below pH 4.6 to the mature enzyme	-, 668006