The pH stability curve of immobilized and free laccase is
depicted in Fig. 3. From the values in the above mentioned figure, it
can be deduced that compared to the free laccase, the immobilized
laccase stability in acidic pH values was higher (about 30%). Also,
the stability of the immobilized laccase in the pH range 7.0e9.0 was
about 20% higher than the free enzyme.
Generally, free enzymes can lose their activities quickly (Cevik
et al., 2011). Hence, it is advisable to immobilized enzymes. Storage
stability is one of the most important parameters to be
considered in biocatalyst immobilization.