Cysteine, L-

Cysteine, L- - Names and Identifiers

Name	L(+)-Cysteine
Synonyms	L-Cys Zistein H-Cys-OH CYSTEINE NSC 8746 L-Cysteine Cysteine, L- L(+)-Cysteine L-(+)-Cysteine L-Cysteine Base (S)-(-)-Cysteine L-Alanine, 3-mercapto- L-beta-mercaptoalanine L-Cysteine Free Base Crystalline (+)-2-Amino-3-mercaptopropionic acid
CAS	52-90-4 4371-52-2
EINECS	200-158-2
InChI	InChI=1/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,6)/t2-/m0/s1

Cysteine, L- - Physico-chemical Properties

Molecular Formula	C3H7NO2S
Melting Point	220℃
Boling Point	293.9 °C at 760 mmHg
Specific Rotation(α)	8.75 º(C=12, 2N HCL)
Water Solubility	280 g/L (25℃)
Appearance	White crystalline powder
Storage Condition	2-8℃
Sensitive	Sensitive to light
MDL	MFCD00064306
Physical and Chemical Properties	Double Crystal monoclinic or orthogonal crystal, melting point 178 ℃,[alpha] 26.5(mol/L hydrochloric acid), with imine taste, in neutral or slightly alkaline solution is easy to be air oxidation into cystine, acidic environment is stable, soluble in water, ethanol, acetic acid, insoluble in ether, acetone, ethyl acetate, benzene, carbon disulfide and carbon tetrachloride.
Use	For the treatment of eczema, urticaria, freckles and other skin diseases, its series of products are widely used in medicine, food and cosmetics industry

Cysteine, L- - Risk and Safety

Hazard Symbols	Xn - Harmful
Risk Codes	R22 - Harmful if swallowed R36/37/38 - Irritating to eyes, respiratory system and skin.
Safety Description	S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection

Cysteine, L- - Introduction

L-cysteine (L-Cysteine) is a non-essential amino acid, encoded by codons UGU and UGC, and is a sulfhydryl-containing amino acid. Due to the presence of sulfhydryl groups, its toxicity is small, and as an antioxidant, it can prevent the generation of free radicals. & & L-cysteine is a naturally occurring non-essential amino acid. He is an activator of NMDA. It also plays many roles in cell culture, as follows: 1. Protein synthesis substrate; The sulfhydryl group in cysteine plays an important role in the formation of disulfide bonds, and is also responsible for the folding of proteins, the generation of secondary and tertiary structures. 2. Acetyl-CoA synthesis; 3. protect cells from oxidative stress; 4. is the main source of sulfur in cell culture; 5. Metal ionophore. & & Biological activity: Cysteine is a polar α-amino acid containing sulfhydryl groups in aliphatic group. Cysteine is a conditional essential amino acid and saccharogenic amino acid for the human body. It can be converted from methionine (methionine, an essential amino acid for the human body) and can be converted into cystine. The decomposition of cysteine is decomposed into pyruvate, hydrogen sulfide and ammonia through the action of desulphurase under anaerobic conditions, or through transamination, the intermediate product β-mercaptopyruvate is decomposed into pyruvate and sulfur. Under oxidation conditions, after being oxidized to cysteine sulfurous acid, it can be decomposed into pyruvate and sulfurous acid by transamination, and decomposed into taurine and taurine by decarboxylation. In addition, cysteine is an unstable compound, easily redox, and interconverts with cystine. It can also be condensed with toxic aromatic compounds to synthesize mercapturic acid to detoxify. Cysteine is a reducing agent, which can promote the formation of gluten, reduce the time required for mixing and the energy required for medicinal use. Cysteine weakens the structure of the protein by changing the disulfide bonds between protein molecules and inside the protein molecules, so that the protein stretches out.

Last Update：2022-10-16 17:25:49

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Cysteine, L-

Cysteine, L-

L(+)-Cysteine

CAS: 52-90-4;4371-52-2

Molecular Formula: C3H7NO2S

Cysteine, L- - Names and Identifiers

Cysteine, L- - Physico-chemical Properties

Cysteine, L- - Risk and Safety

Cysteine, L- - Introduction

Supplier List

Cysteine, L- Request for Quotation

L(+)-Cysteine

CAS: 52-90-4;4371-52-2

Molecular Formula: C3H7NO2S

Cysteine, L- - Names and Identifiers

Cysteine, L- - Physico-chemical Properties

Cysteine, L- - Risk and Safety

Cysteine, L- - Introduction

Supplier List

Cysteine, L-