Fatty acid-binding protein 1 (FABP1) is also known as Fatty acid-binding protein, liver (FABPL), Liver-type fatty acid-binding protein (L-FABP). FABP1 / FABPL belongs to the calycin superfamily and Fatty-acid binding protein (FABP) family. Fatty acid binding proteins are a family of small, highly conserved, cytoplasmic proteins that bind long-chain fatty acids and other hydrophobic ligands. FABP1 / L-FABP binds free fatty acids and their coenzyme A derivatives, bilirubin, and some other small molecules in the cytoplasm. FABP-1 may be involved in intracellular lipid transport.