3.4.21.48	proteolytic modification	the proteinase B precursor is glycosylated and proteolytically processed at least three times before mature enzyme is formed. The precursor is autocatalytically cleaved to yield the NH2 terminus and the COOH terminus of the mature enzyme. The pro region plays an essential role in the proteolytic processing of the enzyme	95515	
3.4.21.48	side-chain modification	Asn-linked glycosylation	95514	
3.4.21.48	side-chain modification	contains 8-9% neutral sugars and 1.5% amino sugars	95499