| Qualifier | EC_number |
| Definition | Enzyme Commission number for enzyme product of sequence |
| Value Format | "text" |
| Example | /EC_number="1.1.2.4" /EC_number="1.1.2.-" /EC_number="1.1.2.n" /EC_number="1.1.2.n1" |
| Comment | valid values for EC numbers are defined in the list prepared by the Nomenclature Committee of the International Union of Biochemistry and Molecular Biology (NC-IUBMB) (published in Enzyme Nomenclature 1992, Academic Press, San Diego, or a more recent revision thereof). The format represents a string of four numbers separated by full stops; up to three numbers starting from the end of the string can be replaced by dash "." to indicate uncertain assignment. Symbols including an "n", e.g. "n", "n1" and so on, can be used in the last position instead of a number where the EC number is awaiting assignment. Please note that such incomplete EC numbers are not approved by NC-IUBMB. |