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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. Cysteine is chiral, but both D and L-cysteine ...
Penicillamine, sold under the brand name of Cuprimine among others, is a medication primarily used for the treatment of Wilson's disease. [1] It is also used for people with kidney stones who have high urine cystine levels, rheumatoid arthritis, and various heavy metal poisonings.
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.
Chemical formula: C 3 H 7 N O 2 S Molar mass: 121.16 g·mol −1 Systematic name: (2R)-2-amino-3-sulfanyl-propanoic acid Abbreviations: C, Cys Synonyms: 2-amino-3-mercaptopropanoic acid
Cysteamine is an organosulfur compound with the formula HSCH 2 CH 2 NH 2.A white, water-soluble solid, it contains both an amine and a thiol functional groups. It is often used as salts of the ammonium derivative [HSCH 2 CH 2 NH 3] + [12] including the hydrochloride, phosphocysteamine, and the bitartrate. [13]
Carbocisteine, also called carbocysteine, is a mucolytic that reduces the viscosity of sputum and so can be used to help relieve the symptoms of chronic obstructive pulmonary disorder (COPD) and bronchiectasis by allowing the sufferer to bring up sputum more easily.
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Do not mix iron and cysteine before adding to medium as the L-cysteine is a chelating agent. Adjust the pH of the medium to 6.9 at room temperature. Since reagents may vary, each laboratory must determine the amount of KOH required. Hold the completed medium at 50 °C, pour a 10 mL sample, and check the pH at room temperature. When necessary ...