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Cysteine (/ ˈ s ɪ s t ɪ iː n /; [5] symbol Cys or C [6]) is a semiessential [7] proteinogenic amino acid with the formula HOOC−CH(−NH 2)−CH 2 −SH. The thiol side chain in cysteine enables the formation of disulfide bonds , and often participates in enzymatic reactions as a nucleophile .
Abbreviations: C, Cys Synonyms: 2-amino-3-mercaptopropanoic acid 2-amino-3-mercaptopropionic acid 2-amino-3-sulfanylpropanoic acid 3-mercaptoalanine AIDS{-}160777 CHEBI:15356 CHEMBANK2703 NSC 63864 NSC647530 NSC8746 Zystein
When comparing a polar and nonpolar molecule with similar molar masses, the polar molecule in general has a higher boiling point, because the dipole–dipole interaction between polar molecules results in stronger intermolecular attractions. One common form of polar interaction is the hydrogen bond, which is also
Vapor phases represent the simplest non polar phases, because it has no interaction with the solute. [18] The hydration potential and its correlation to the appearance of amino acids on the surface of proteins was studied by Wolfenden. Aqueous and polymer phases were used in the development of a novel partitioning scale. [19]
Selenocysteine (symbol Sec or U, [4] in older publications also as Se-Cys) [5] is the 21st proteinogenic amino acid. Selenoproteins contain selenocysteine residues. Selenocysteine is an analogue of the more common cysteine with selenium in place of the sulfur .
The Getty Villa art museum is threatened by the flames of the wind-driven Palisades Fire in Pacific Palisades, California, Jan. 7, 2025. A fast-moving brushfire in a Los Angeles suburb burned ...
The enzyme TEV protease [a] contains an example of a catalytic triad of residues (red) in its active site.The triad consists of an aspartate (), histidine and cysteine (nucleophile).
nonpolar polar basic acidic Termination: stop codon Mitochondrial genetic code 1st ... (Cys/C) Cysteine: U UUC UCC UAC UGC C UUA (Leu/L) Leucine: UCA UAA Stop: UGA