This is mostly caused by tires that are overinflated. When a tire is overinflated, the tire, in essence, bulges out more in the center. The tire then rides mostly on that bulge and that bulge wears faster than the sides of the tire. Keeping your tires properly inflated can help you to avoid center wear.
Lysozyme is abundant in a number of secretions, such as tears, saliva, human milk, and mucus. It is also present in cytoplasmic granules of the macrophages and the polymorphonuclear neutrophils (PMNs). Large amounts of lysozyme can be found in egg white.
Lysozyme hydrolyzes the beta-glycosidic linkage between N-acetylmuramic acid and N-acetyl glucosamine in the peptidoglycan of bacterial cell walls and can also bind polymers of N-acetyl glucosamine (Arnheim et al. 1972). Molecular Characteristics: The mature lysozyme of chicken is composed of 128 amino acids. Amino acid sequences of other avian lysozymes are homologous in sequence and differ in only 4 to 20 amino acids (Arnheim et al. 1973). The lysozyme gene in chickens is expressed tissue specifically in the oviduct and in macrophages.