| http://purl.uniprot.org/keywords/643 | http://www.w3.org/2000/01/rdf-schema#comment | "Protein involved in the biosynthesis of prostaglandins. Prostaglandins are fatty acids composed of 20 carbons with a substituted cyclopentane ring. There are four major classes of prostaglandin, which differ in the position of the double bonds and/or the oxygen substituents on the ring: PGA, PGB, PGE, and PGF. They are found in many mammalian tissues."xsd:string |