Cycloeucalenol cycloisomerase EC#: 5.5.1.9; ChemWhat Code: 1383483
| Product Name | Cycloeucalenol cycloisomerase | 
| Example Structure | ![]()  | 
| Synonyms | Atcpi, Cycloeucalenol isomerase, Cycloeucalenol–obtusifoliol isomerase, Cycloeucalenol-obtusifoliol isomerase, Cyclopropyl sterol isomerase, Isomerase, cycloeucalenol-obtusifoliol | 
| EC Number | 5.5.1.9 | 
| CAS Registry Number | |
| Comments | Opens the cyclopropane ring of a number of related 4¦Á-methyl-9¦Â-19-cyclosterols, but not those with a 4¦Â-methyl group, with formation of an 8(9) double bond. Involved in the synthesis of plant sterols. | 
| Cofactor | |
| History | |
| Reactions | Cycloeucalenol = obtusifoliol. | 
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