May function as inhibitor of dietary triglyceride digestion. Lacks detectable lipase activity (in vitro) (By similarity). Secreted in acinar cells. Expressed in female, but not in male, lacrimal gland. Expressed in male and female sublingual gland and pancreas. Mice have no visible phenotype during the first 10 weeks after birth and are fertile. Adult mice have normal body weight, but higher than normal body fat and lower than normal lean mass. They display impaired glucose tolerance and decreased insulin sensitivity, and obesity and insulin resistance are exacerbated by high-fat diet. Their pancreatic juice has greater ability to hydrolyze triglycerides than that from wild-type littermates. Expression is gender and species-specific. Belongs to the AB hydrolase superfamily. Lipase family.