Selenium
Selenium is the 34th element in the periodic table, with atomic mass of 78.96.[1] It is the key element in selenocysteine (a cysteine amino acid where the sulphur atom is replaced by a selenium atom), an amino acid that occurs infrequently in proteins in both eukaryotes and prokaryotes.[2]
References
- ↑ Royal Society of Chemistry (2011), Selenium. http://www.rsc.org/periodic-table/element/34/selenium Last accessed 27/11/2014
- ↑ PubMed.gov (1991), Selenocysteine: the 21st amino acid, http://www.ncbi.nlm.nih.gov/pubmed/1828528 Last accessed 27/11/2014