cyclase activity tocopherol cyclase activity https://github.com/geneontology/go-ontology/issues/27869 https://github.com/geneontology/go-ontology/issues/28526 MetaCyc:RXN-2543 Catalysis of the reactions: delta-tocopherol = 2-methyl-6-phytyl-1,4-benzene-1,4-diol, gamma-tocopherol = 2,3-dimethyl-6-phytylbenzene-1,4-diol. delta-tocotrienol = 6-geranylgeranyl-2-methylbenzene-1,4-diol gamma-tocotrienol, and = 6-geranylgeranyl-2,3-dimethylbenzene-1,4-diol. RHEA:38015 RHEA:37983 RHEA:37987 molecular_function GO:0009976 KEGG_REACTION:R10623 KEGG_REACTION:R10624 MetaCyc:RXN-14922 MetaCyc:RXN-14921 RHEA:38023 KEGG_REACTION:R07502 MetaCyc:RXN-2561 KEGG_REACTION:R07503 EC:5.5.1.24