# respiratory chain complex I

> enzyme of the respiratory chain consisting of several polypeptide chains; L-shaped with a horizontal arm lying in the membrane, and a vertical arm that projects into the cytoplasm of prokaryotes, or the matrix of mitochondria.

**Wikidata**: [Q22326958](https://www.wikidata.org/wiki/Q22326958)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Respiratory_complex_I)  
**Source**: https://4ort.xyz/entity/respiratory-chain-complex-i


## References

1. Gene Ontology release 2019-10-07
2. [Source](ftp://ftp.expasy.org/databases/enzyme/enzyme.dat)
3. Gene Ontology release 2022-07-01
4. ENZYME
5. UMLS 2023
6. [Source](http://www.tcdb.org/search/result.php?tc=3.D.1)