Purity >95%. Oleic acid is a monounsaturated fatty acid and is one of the major components of membrane phospholipids. Oleic acid contributes about 17% of the total fatty acids esterified to phosphatidylcholine, the major phospholipid class in porcine platelets. Oleic acid-biotin was designed to allow oleic acid to be detected in complexes with protein binding partners such as fatty acid binding proteins (FABPs). This it has the potential to serve as a tool to be used in the general elucidation of the signalling and transport of free oleic acid.