The protein homogeneity status of the food enzyme was also investigated by SDS-PAGE analysis. The
apparent molecular mass based on this technique is about 45 kDa (compared to the calculated
molecular mass of 40.8 kDa). According to the applicant, this is most likely due to glycosylation, a
common feature of proteins of Aspergillus. The gels presented for the four batches were comparable;variations in the relative amounts of the protein bands were suggested by the applicant to be caused by
different glycosylation patterns.