Ojo, O.O., and J.O. Ajele. 2011. “Isolation, Purification, Characterization and the Possible Involvement of Histidine and Cysteine in the Catalytic Mechanism of Beta-Amylase Sourced from Cassava (Manihot Esculenta Crantz) Peel”. Pakistan Journal of Nutrition 10 (9): 823–830. https://doi.org/10.3923/pjn.2011.823.830.