In physiological conditions, is crucial for intracellular hydrolysis of cholesteryl esters and triglycerides that have been internalized via receptor-mediated endocytosis of lipoprotein particles. In venom, the biological contribution is unknown. a sterol ester + H2O = a fatty acid + a sterol + H(+) Expressed by the venom gland. Belongs to the AB hydrolase superfamily. Lipase family.