A homotetramer is a protein complex made up of four identical subunits which are associated but not covalently bound. A heterotetramer is a 4-subunit complex where one or more subunits differ.
Examples of homotetramers include:
- "GO term: protein homotetramerization". YeastGenome. Archived from the original on 27 September 2011. Retrieved 14 May 2011.
- "GO term: protein heterotetramerization". YeastGenome. Archived from the original on 27 September 2011. Retrieved 14 May 2011.
- Watanabe, M; Blobel, G (April 1989). "Cytosolic factor purified from Escherichia coli is necessary and sufficient for the export of a preprotein and is a homotetramer of SecB". Proceedings of the National Academy of Sciences of the United States of America. 86 (8): 2728–32. doi:10.1073/pnas.86.8.2728. PMC 286991. PMID 2649892.
- Warren, M. A.; Kucharski, L. M.; Veenstra, A.; Shi, L.; Grulich, P. F.; Maguire, M. E. (1 July 2004). "The CorA Mg2+ Transporter Is a Homotetramer". Journal of Bacteriology. 186 (14): 4605–4612. doi:10.1128/JB.186.14.4605-4612.2004. PMC 438605. PMID 15231793.