selenocysteine

Noun

Meaning

English Wikipedia has an article on:selenocysteineWikipedia
selenocysteine (countable and uncountable, plural selenocysteines)

(biochemistry) A naturally-occurring amino acid, present in several enzymes, whose structure is that of cysteine but with the sulfur atom replaced by one of selenium

Examples

Biology Selenocysteine has both a lower pKa (5.47) and a lower reduction potential than cysteine. Source: Internet

Selenocysteine was discovered by biochemist Thressa Stadtman citation at the National Institutes of Health. Source: Internet

Structure Selenocysteine has a structure similar to that of cysteine, but with an atom of selenium taking the place of the usual sulfur, forming a selenol group which is deprotonated at physiological pH. Source: Internet

Selenocysteine is now viewed as the 21st amino acid, and pyrrolysine is viewed as the 22nd. Source: Internet

Proteinogenic amino acids seeAlso The amino acid selenocysteine Amino acids are the structural units (monomers) that make up proteins. Source: Internet

Proteins that contain one or more selenocysteine residues are called selenoproteins. Source: Internet

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