Kinetics of the enzymatic hydrolysis of hydrobiont tissue proteins: effect of the enzyme introduction

Kinetic laws of enzyme hydrolyze for Atlantic cod tissues have been studied. Enzyme specimen produced from hepatopancreas of Kamchatka crab Paralithodes camtschatica was used for carrying out hydrolyzes (proteolysis). A new method of protein hydrolyzate production based on multiple enzyme injection (over equal time intervals) into a reactive system has been worked out. It has been shown that this method assures increase of maximum degree of hydrolyze. A kinetic model describing the mechanism for enzyme hydrolysis of fish protein in the proposed technology has been developed. The model is based on the existence of easily and hardly hydrolyzed protein fractions. In the frame of the obtained kinetic model, the second-order constants of intermediate stage rates of proteolysis have been calculated. The content of free amino acids increases 2-fold, and dispersity of aqueous dispersions increases for the hydrolysates obtained in the multiple injection process in comparison with hydrolysate obtained in a traditional single-stage process.