Kinetic Calculations of Starch Degradation Rate by Ptyalin

Objectives: This study aims to investigate the kinetics of starch processing by ptyalin, the enzyme responsible for initiating starch digestion in the mouth. Kinetic parameters such as Km and Vmax will be calculated from the Lineweaver-Burk plot, covering the surface layer of starch-ptyalin interaction and the maximum rate of enzymatic activity. Theoretical Framework: Starch is a complex carbohydrate essential in the human diet, composed of amylose and amylopectin, and is commonly found in foods like sliced bread. Ptyalin, also known as salivary amylase, initiates the starch digestion process in the mouth by converting it into maltose. Enzyme kinetics can be studied using the Michaelis-Menten model, where parameters such as Km (Michaelis constant) and Vmax (maximum velocity) are crucial for understanding the efficiency of the enzymatic interaction. Method: To obtain data on enzyme kinetics, experimental analyses were conducted using different starch concentrations, and the results were evaluated based on the Lineweaver-Burk curve. Additionally, statistical techniques were applied to verify the validity of the data, including the ANOVA test and the Anderson-Darling analysis to confirm the normality of the data distribution. Capability charts were used to assess process compliance within specification limits. Results and Discussion: The results demonstrated that there was no significant difference between the studied groups, with a p-value greater than 0.05 in the ANOVA test. The Anderson-Darling analysis confirmed that the data follow a normal distribution. The Vmax value was determined to be 0.023, representing the maximum rate of enzymatic activity, and the Km was 1.274, indicating a high affinity of ptyalin for starch. Research Implications: This research contributes to a detailed understanding of ptyalin kinetics in starch digestion, providing important information on enzymatic efficiency at different concentrations. These data are applicable in areas such as nutrition, food quality control, and the development of food products that consider carbohydrate digestibility. Originality/Value: The originality of this study lies in the integrated approach to the enzyme kinetics of ptyalin applied to starch digestion, utilizing not only the classical parameters of Km and Vmax but also advanced statistical techniques, such as the ANOVA test and Anderson-Darling normality analysis. The combination of these tools allowed for a more robust and accurate analysis of ptyalin efficiency under different conditions.