<http://purl.uniprot.org/go/0050329> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://purl.uniprot.org/core/Concept> .
<http://purl.uniprot.org/go/0050329> <http://www.w3.org/2000/01/rdf-schema#comment> "Catalysis of the reaction: tetrahydroxypteridine = H(+) + xanthine-8-carboxylate." .
<http://purl.uniprot.org/go/0050329> <http://www.w3.org/2000/01/rdf-schema#subClassOf> <http://purl.uniprot.org/go/0016872> .
<http://purl.uniprot.org/go/0050329> <http://www.w3.org/2000/01/rdf-schema#label> "tetrahydroxypteridine cycloisomerase activity" .
<http://purl.uniprot.org/go/0050329> <http://www.w3.org/2000/01/rdf-schema#label> "tetrahydroxypteridine lyase (isomerizing)" .
<http://purl.uniprot.org/go/0050329> <http://www.w3.org/2004/02/skos/core#exactMatch> <http://www.geneontology.org/go#GO:0050329> .