High Purity and Good Effect CAS 52-90-4 L-Cysteine
L-Cysteine Free Base;Valine,L-2-Amino-3-mercaptopropanoic acid;(2R)-2-amino-3-sulfanyl-propanoic acid;Half-cystine;L-2-Amino-3-mercaptopropionic acid;L-Cysteine Base;(+)-2-Amino-3-mercaptopropionic acid
Melting Point:220 °C
Boiling Point:293.9 °C at 760 mmHg
Solubility:280 g/L (25°C) in water
Appearance:white crystalline powder
Assay: 99.0% to 101.0%
Storage: cool, dry and ventilated place
Application: Cysteine, mainly the L-enantiomer, is a precursor in the food, pharmaceutical, and personal care.
Cysteine (abbreviated as Cys or C) is a semi-essential proteinogenic amino acid with the formulaHO2CCH(NH2)CH2SH. It is encoded by the codons UGU and UGC. The thiol side chain in cysteine often participates in enzymatic reactions, as a nucleophile. The thiol is susceptible to oxidization to give thedisulfide derivative cystine, which serves an important structural role in many proteins. When used as a food additive, it has the E number E920.
It can be seen as serine, but with one of the oxygen atoms replaced with sulfur; replacing said atom withselenium gives selenocysteine.