---
id: "ec_enzyme_number"
kind: "datatype"
status: "draft"
is_pii: false
categories: ["science", "chemistry"]
langs: ["common"]
quality: 80
url: "http://registry.apicrafter.io/datatype/ec_enzyme_number"
---

# Enzyme Commission (EC) number (`ec_enzyme_number`)

> **Draft.** Draft records have not been reviewed yet and may be incomplete or wrong; do not treat them as authoritative for legal or compliance decisions.

Classification number of an enzyme by the reaction it catalyses, assigned by the IUBMB: four numbers separated by dots, such as 3.4.21.5. A hyphen stands for an unassigned level and an n prefix marks a preliminary number. It differs from the European Community (EC) number of a chemical substance.

- Personal data (PII): no
- Categories: Scientific (science), Chemistry (chemistry)
- Countries: global
- Languages: Common to most languages (common)
- Classification: categorical

## Detection

Regular expression (Python `re`):

```
^\d\.(?:-|n?\d{1,2})\.(?:-|n?\d{1,2})\.(?:-|n?\d{1,3})$
```

## Examples

- `2.7.3.2` — creatine kinase
- `3.2.1.1` — alpha-amylase
- `3.4.21.5` — thrombin

## Mappings

- bioregistry: `ec`
- wikidata: `P591`

## Sources

- wikipedia: <https://en.wikipedia.org/wiki/Enzyme_Commission_number>
- wikidata: <https://www.wikidata.org/wiki/Property:P591>

## Quality

Score 80/100. Missing: negative example, translation, detector coverage.

JSON: <http://registry.apicrafter.io/api/v1/datatypes/ec_enzyme_number.json> · Edit: <https://github.com/apicrafter/metacrafter-registry/edit/main/data/datatypes/any/science/ec_enzyme_number.yaml>