The average specific activity of the enzyme preparations expressed as ratio enzyme activity/mg TOS
was 23.6 FXU(S)/mg TOS; the values ranged from 21.5 to 26.1 FXU(S)/mg TOS (Table 1).
Considering the low variability of the activities as well as the specific activities in the three enzyme
preparations, the average activity/mg TOS value of 23.6 FXU(S)/mg TOS was used for subsequent
calculations.