by extending the chromatofocusing technique to a very acidic ph range ( down to ph 2.0 ) a method which , in a single-step procedure , allows separation of the three main aspartic proteases secreted by the bovine abomasal mucosa i.e. , chymosin ( ec 3.4.23.4 ) , gastricsin ( ec 3.4.23.3 ) , and pepsin a ( ec 3.4.23.1 ) , has been developed .
C0078989
aspartic proteases
C0030909
pepsin a