In the case of sample with 10 pkat mL−1 added enzyme, 7.3% (w/v) sedimented protein and 16.1 mm pH 4.6-soluble peptides are formed after four weeks of storage, whereas the addition of 1 pkat mL−1 results in the formation of 7.5% (w/v) sedimented protein and 6.5 mm pH 4.6-soluble peptides. This is probably caused by the endopeptidase activity, which leads firstly to the formation of bigger protein fragments that are not soluble at pH 4.6. The further hydrolysis of these fragments increases the amount of peptides soluble at pH 4.6. Thus, the increase of sedimented protein is followed by the increase of pH 4.6-soluble peptides.