http://purl.uniprot.org/keywords/718 | http://www.w3.org/2000/01/rdf-schema#comment | "Protein involved in the synthesis of the amino acid serine, a constituent of proteins and precursor of several metabolites, including cysteine, glycine and choline. Serine is mostly formed from 3-phosphoglycerate in a 3-step reaction pathway."xsd:string |