Selenocysteine [1] is the 21st protein-building amino acid.[2] It is almost the same as cysteine, but a selenium atom replaces the sulfur atom.
References
- ↑ abbreviated as Sec or U; and in older publications as Se-Cys
- ↑ Stadtman, Therese 1974. Selenium biochemistry. Science. 183 (4128): 915–22. [1] Archived 2016-12-22 at the Wayback Machine
Encoded (proteinogenic) amino acids |
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| General topics | |
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| By properties | | Aliphatic |
- Alanine
- Branched-chain amino acids (Valine
- Isoleucine
- Leucine)
- Methionine
- Proline
- Glycine
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| Aromatic | |
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| Polar, uncharged | |
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| Positive charge (pKa) |
- Histidine (≈6.1)
- Lysine (≈10.8)
- Arginine (≈12.5)
- Pyrrolysine
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| Negative charge (pKa) | |
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- Amino acids types: Encoded (proteins)
- Essential
- Non-proteinogenic
- Ketogenic
- Glucogenic
- Secondary amino
- Imino acids
- D-amino acids
- Dehydroamino acids
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