The Enzyme Classification contains the recommendations of the Nomenclature Committee of the International Union of Biochemistry and Molecular Biology on the nomenclature and classification of enzyme-catalysed reactions.

Prefix
eccode
Alternative Prefixes
EC ec-code EC_CODE ECCODE EC-CODE intenz
Links
Homepage
Contact
Missing Contact
Pattern for Local Unique Identifiers

Local identifiers in Enzyme Nomenclature should match this regular expression:
^\d{1,2}(((\.\d{1,3}){1,3})|(\.\d+){2}\.n\d{1,3})?$

Example Local Unique Identifiers
1.1.1.1   Resolve
2   Resolve
2.3   Resolve
2.3.1   Resolve
2.3.1.n12   Resolve
3.1.26.n2   Resolve
Pattern for CURIES

Compact URIs (CURIEs) constructed from Enzyme Nomenclature should match this regular expression:
^eccode:\d{1,2}(((\.\d{1,3}){1,3})|(\.\d+){2}\.n\d{1,3})?$

Example CURIEs
eccode:1.1.1.1
eccode:2
eccode:2.3
eccode:2.3.1
eccode:2.3.1.n12
eccode:3.1.26.n2
Ontology
Metaregistry Enzyme Nomenclature

The metaregistry provides mappings between the Bioregistry and other registries. There are 6 mappings to external registries for eccode.

Registry Name Metaprefix External Prefix
FAIRSharing FAIRSharing logo fairsharing FAIRsharing.q1fdkc
Gene Ontology Registry go EC
Identifiers.org Identifiers.org logo miriam ec-code
Name-to-Thing Name-to-Thing logo n2t ec-code
Prefix Commons prefixcommons EC
Wikidata Property Wikidata Property logo wikidata P591
Providers

Providers are various services that resolve CURIEs to URLs. The example CURIE eccode:1.1.1.1 is used to demonstrate the provides available for eccode. Generation of OLS and BioPortal URLs requires additional programmatic logic beyond string formatting.

Name Metaprefix URI
Enzyme Nomenclature eccode https://www.ebi.ac.uk/intenz/query?cmd=SearchEC&ec=1.1.1.1
Bioregistry bioregistry https://bioregistry.io/eccode:1.1.1.1
Identifiers.org miriam https://identifiers.org/ec-code:1.1.1.1
Name-to-Thing n2t https://n2t.net/ec-code:1.1.1.1
Extra Providers

Additional providers curated in the Bioregistry are listed here.

Code Name URL
CURATOR_REVIEW KEGG Ligand Database for Enzyme Nomenclature https://www.genome.jp/dbget-bin/www_bget?ec:1.1.1.1
expenz ExploreEnz at Trinity College http://www.enzyme-database.org/query.php?ec=1.1.1.1
enzymeportal Enzyme Portal through EMBL-EBI https://www.ebi.ac.uk/enzymeportal/ec/1.1.1.1
expasy Enzyme nomenclature database, ExPASy (Expert Protein Analysis System) https://enzyme.expasy.org/EC/1.1.1.1