4. Conclusions
Based on our analyses, pitaya (H. polyrhizus) peel can be considered
an important candidate for the production of novel amylase
enzyme. The enzyme is calcium-independent and thermo-tolerant
with activity in the high pH ranges. In addition, the amylase displayed
proper stability in the presence of chelating and oxidising
agents. These features, along with the rich and cost-effective
source, indicate that this enzyme has potential as a useful amylolytic
enzyme in various industrial applications, especially in the
food industry.