Lysozyme is present in all except:
Lacrimal secretions
CSF
Saliva
Respiratory tract secretions
Lysozyme is a heat-labile protein which acts as a muraminidase and hence has bactericidal activity. It is present in tears, saliva and all mucosal secretions, but is absent in CSF, sweat and urine
Immunology Pa 1 (Immune Response, Antigen-Antibody Reactions, Hypersensitivity, Structure of Immune System, Immunodeficiency Disorders)