In fact, lysozyme forms amyloid fibrils with different morphology depending on fibrillation conditions such as pH, temperature, salt concentration, etc. Furthermore, due to its highly homologous nature, hen egg white lysozyme (HEWL), a 14.3 kDa bacteriolytic enzyme with 129 residues, has often been used instead of human lysozyme, as a model system to study the molecular mechanism of amyloid fibril formation and eventually the lysozyme amyloidosis. This evidence concerns the gene LYZ and amyloidosis.