Introduction
Lysozyme is an alkaline enzyme that can hydrolyze mucopolysaccharides in bacteria. Lysozyme mainly destroys the β- 1,4 glycosidic bonds between N-acetyl cell wall acid and N-acetylglucosamine, decomposing insoluble mucopolysaccharides in the cell wall into soluble glycopeptides, which results in the rupture of the cell wall and the escape of contents, leading to the dissolution of bacteria. Lysozymes can also directly bind to negatively charged viral proteins, forming complexes with DNA, RNA, and apo proteins to deactivate the virus. This enzyme widely exists in various tissues of human body, as well as egg whites of birds and poultry, tears, saliva, plasma, milk and other liquids of mammals, microorganisms, of which the highest content is in egg white.