Anti-FAAH antibodies are used in the immunodetection of the protein fatty acid amide hydrolase. In humans, the canonical protein has a reported length of 579 amino acid residues and a mass of 63.1 kDa. Its subcellular localization is in the cytoplasm. It is reported to be highly expressed in the brain, small intestine, pancreas, skeletal muscle and testis. A member of the Amidase protein family, FAAH is known to catalyze the hydrolysis of endogenous amidated lipids like the sleep-inducing lipid oleamide ((9Z)-octadecenamide), the endocannabinoid anandamide (N-(5Z,8Z,11Z,14Z-eicosatetraenoyl)-ethanolamine), as well as other fatty amides, to their corresponding fatty acids, thereby regulating the signaling functions of these molecules. Synonyms for this target antigen include PSAB, fatty-acid amide hydrolase 1, anandamide amidohydrolase 1, fatty acid ester hydrolase, oleamide hydrolase 1, and FAAH-1. A number of FAAH antibodies have been mentioned in research publications and have associated citations. Western Blot is a widely used application for these antibodies. ELISA and Immunohistochemistry are also common applications.