racemase and epimerase activity hydantoin racemase activity https://github.com/geneontology/go-ontology/issues/30193 Catalysis of the reaction: D-5-monosubstituted hydantoin = L-5-monosubstituted hydantoin. KEGG_REACTION:R09704 MetaCyc:RXN-9781 molecular_function RHEA:84227 RHEA:46624 RHEA:83951 EC:5.1.99.5 2012-09-19T10:47:56Z GO:0036348 bf RHEA:84231 RHEA:83991