Anti-FAPP antibodies are protein reagents that detect specific antigens. The FAPP antigen is another term for the human protein carboxyl ester lipase, encoded by the CEL gene. The protein is known to catalyze the hydrolysis of a wide range of substrates including cholesteryl esters, phospholipids, lysophospholipids, di- and tri-acylglycerols, and fatty acid esters of hydroxy fatty acids (FAHFAs). Canonically, it has an amino acid length of 753 residues and a mass of 79.3 kilodaltons. It is a secreted protein and it is expressed in the stomach, pancreas, and lactating breast. The FAPP protein is a member of the Type-B carboxylesterase/lipase protein family. Other alias names for FAPP include BAL, BSDL, and BSSL. Western Blot is the most common application for the FAPP antibodies listed below. ELISA and Immunohistochemistry are also common applications.