What is the meaning of L-cysteine?
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What is the meaning of L-cysteine?

Views: 0     Author: Site Editor     Publish Time: 2022-06-04      Origin: Site

L-cysteine is a common amino acid in living organisms. It belongs to the sulfur-containing amino acids. In the presence of nitroprusside, it becomes purple (colored by SH). It is found in many proteins and glutathione. It can form insoluble with Ag+, Hg+, Cu+ and other metal ions. Mercaptide.


  • What is the synthesis method of L-cysteine?

  • What role does L-cysteine play?

  • What is the detoxification of L-cysteine?



What is the synthesis method of L-cysteine?

1. Process for the reduction of tin particles. The cystine was dissolved in dilute hydrochloric acid, filtered, and the filtrate was mixed with tin particles, and the temperature was heated 2h under reflux. The reduction solution was diluted with water, stripped of remaining tin particles, saturated with hydrogen sulfide, filtered, the filter residue washed with little water, washing water and filtrate combined, confined in vacuum, crystallized by cooling and dried to obtain L-cysteine.

2. Electrolytic reduction process. Distilled water, hydrochloric acid and cystine were added to the electrolysis cell and stirred to dissolve, and electrolysis was kept below 50°C to the end point. The electrolyte obtained was passed through hydrogen sulfide and filtered for several hours. The filtrate was discoloured, filtered and concentrated under reduced pressure by adding activated carbon, crystallized by cooling, filtered and dried to obtain L-cysteine.

3.Synthesis: It can be obtained by hydrolyzing proteins (such as human hair) with hydrochloric acid, then treating with copper oxide and decomposing with hydrogen sulfide. L-cysteine can also be obtained from the breakdown of cystine.


What role does L-cysteine play?

L-cysteine is mainly used in medicine, cosmetics, biochemical research etc. used. Used in bread to promote the formation of gluten, promote fermentation, dissolve mold, prevent aging, etc. Used in natural juices to prevent the oxidation of vitamin C and the tanning of the juice. This product has a detoxifying effect and can be used for acrylonitrile poisoning and poisoning with aromatic acids. The product also has the effect of preventing radiation damage to the human body, and is also a drug for the treatment of bronchitis, especially as an expectorant (mostly used in the form of acetyl-L-cysteine methyl ester.In cosmetics, L-cysteine is mainly used for beauty lotion, perm, sunscreen, etc.


What is the detoxification of L-cysteine?

L-cysteine is an amino acid antidote involved in the degradation process of cells and phospholipid metabolism in the liver and has the pharmacological effect of protecting liver cells from damage, promoting the restoration of liver function and exuberant pharmacological effects. Mainly used for radioactive poisoning, heavy metal poisoning, antimony poisoning, hepatitis, toxic hepatitis, serum disease, etc. can prevent liver necrosis. If this product is used to save antimony poisoning, it should be administered in time and in sufficient quantities to maximize the formation of non-toxic soluble complexes with antimony ions and excrete from the body.


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