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2. Cysteine - Wikipedia

   en.wikipedia.org/wiki/Cysteine

   Cysteine (symbol Cys or C; [5] / ˈ s ɪ s t ɪ iː n /) [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. Cysteine is chiral, but both D and L-cysteine ...

3. Cystine - Wikipedia

   en.wikipedia.org/wiki/Cystine

   Cystine is the oxidized derivative of the amino acid cysteine and has the formula (SCH 2 CH(NH 2)CO 2 H) 2.It is a white solid that is poorly soluble in water. As a residue in proteins, cystine serves two functions: a site of redox reactions and a mechanical linkage that allows proteins to retain their three-dimensional structure.

4. Cysteine (data page) - Wikipedia

   en.wikipedia.org/wiki/Cysteine_(data_page)

   The complete data for Cysteine. General information. Chemical formula: C 3 H 7 N O 2 S ...

5. Hydrogen chloride - Wikipedia

   en.wikipedia.org/wiki/Hydrogen_chloride

   In part because of its high polarity, HCl is very soluble in water (and in other polar solvents). Upon contact, H 2 O and HCl combine to form hydronium cations [H 3 O] + and chloride anions Cl − through a reversible chemical reaction: HCl + H 2 O → [H 3 O] + + Cl −. The resulting solution is called hydrochloric acid and is a strong acid.

6. Native chemical ligation - Wikipedia

   en.wikipedia.org/wiki/Native_chemical_ligation

   A feature of the native chemical ligation technique is that the product polypeptide chain contains cysteine at the site of ligation. The cysteine at the ligation site can be desulfurized to alanine, thus extending the range of possible ligation sites to include alanine residues. Other beta-thiol containing amino acids can be used for native ...

7. Papain-like protease - Wikipedia

   en.wikipedia.org/wiki/Papain-like_protease

   In humans, there are 11 cysteine cathepsins: B, C, F, H, K, L, O, S, V, X, and W. Most cathepsins are expressed throughout the body, but some have narrower tissue distribution. [1] [3] Human cathepsin K in complex with the covalent inhibitor odanacatib, shown in light blue with the covalently modified catalytic cysteine in green. Odanacatib was ...

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9. Hydrochloride - Wikipedia

   en.wikipedia.org/wiki/Hydrochloride

   In chemistry, a hydrochloride is an acid salt resulting, or regarded as resulting, from the reaction of hydrochloric acid with an organic base (e.g. an amine). An alternative name is chlorhydrate, which comes from French. An archaic alternative name is muriate, derived from hydrochloric acid's ancient name: muriatic acid.