WHAT IS L-CYSTEINE?
203 Views19 Feb 2023
The molecular formula of L-cysteine is C3H7NO2S, which is a non-essential amino acid. It is an isomer of cysteine and can be converted from methionine.
Introduction
Alias: L-а-amino-b-mercaptopropionic acid
English name: L-Cysteine
Molecular formula: C3H7NO2S
Molecular weight: 121.16
CAS Number: 52-90-4
EINECS Number: 200-158-2
Identification: Infrared Spectrum Detection
Specific rotation: +8.3°～ +9.5°
Traits
Cysteine is white crystal or crystalline powder, soluble in water, slightly odorous, insoluble in ethanol, insoluble in organic solvents such as ether. Melting point 240 ℃, monoclinic system. Cysteine is one of the sulfur-containing amino acids, which is a non-essential amino acid. In the organism, the sulfur atom of methionine is replaced with the hydroxyl oxygen atom of serine, and it is synthesized through cystathionine. From cysteine, glutathione can be generated. glycerol. Cysteine is acid stable, but is easily oxidized to cystine in neutral and alkaline solutions.
Physiological function
1. It has a cohesive effect in the living body, so it is effective for a wide range of poisons such as formaldehyde, acetaldehyde, chloroform, carbon tetrachloride, lead, cadmium, methylmercuric chloride, lipid peroxide, PCB, tetrodotoxin, alcohol, etc. The detoxification effects of these have been experimentally demonstrated.
2. Effectively prevent and treat radiation damage.
3. It maintains the activity of important sulfhydrylase in the keratin production of skin proteins, and supplements sulfur groups to maintain the normal metabolism of the skin and regulate the underlying melanin produced by the pigment cells in the lowest layer of the epidermis. It is a very ideal natural whitening. cosmetic. It can remove the melanin of the skin itself, change the nature of the skin itself, and make the skin whiten naturally.
4. Whenever inflammation or allergy occurs and the sulfydrylase such as cholphosphatase decreases, L-cysteine supplementation can maintain the activity of the sulfydrylase and improve the skin symptoms of inflammation and allergy.
5. It has the effect of dissolving keratin, so it is also effective for skin diseases with keratin hypertrophy.
6. It has the function of preventing biological aging.
7. It is mainly distributed in the liver, spleen and kidney, and also accumulates in a large amount on the surface of the human body including the skin, mucous membranes, and the surface of the digestive tract, etc. When foreign bodies including oral ingestion, inhalation from the atmosphere, and skin contact invasion can invade Strengthen the defense ability of the organism itself and adjust the defense mechanism of the organism.
Purpose
1. In cosmetics: used in the production of perm essence, sunscreen, perfume, hair nourishing essence, etc. This kind of advanced perm essence and cold perm essence, which replaces thioglycolic acid with cysteine, is easy to perm, easy to maintain hairstyle, soft and not It can also prepare sunscreen and hair growth perfume;
2. In medicine: cysteine is mainly used in liver medicine, antidote, expectorant and other medicines. Cysteine and its derivatives can be used for liver poisoning and detoxification, antipyretic and analgesic, ulcer treatment, fatigue recovery, infusion and comprehensive amino acid preparations, etc., especially for expectorating phlegm; treating bronchitis and reducing phlegm.
3. In food: bread fermentation accelerator, preservative. Cysteine is used as fermentation aid, antioxidant and stabilizer for milk powder and fruit juice, and nutritional additive for pet food;
4. L-cysteine can be used as the raw material for the production of N-acetyl-L-, carboxymethyl cysteine and other cysteine derivatives.
5. Accelerates the formation of gluten and prevents aging; it can be used in natural juices to prevent the oxidation and browning of VC; it has detoxification effects on acrylonitrile and aromatic acidosis. Prevent radiation damage.
Contrastive identification
L-cysteine cysteine L-cysteine base
L-cysteine is an isomer of cysteine, L and D represent the relative positions of functional groups of chiral compounds, not levorotatory and dextrorotatory. Its actual chirality needs to be determined experimentally, eg L-cysteine is a dextrorotatory compound.
L-cysteine can be used as an amino acid fortifier, but cysteine can be converted from methionine, so it is not a mandatory amino acid, and it is meaningless as an amino acid fortifier.
L-cysteine base is an alkaloid. L-cysteine base is mostly used in medicine and is also an additive.
Introduction
Alias: L-а-amino-b-mercaptopropionic acid
English name: L-Cysteine
Molecular formula: C3H7NO2S
Molecular weight: 121.16
CAS Number: 52-90-4
EINECS Number: 200-158-2
Identification: Infrared Spectrum Detection
Specific rotation: +8.3°～ +9.5°
Traits
Cysteine is white crystal or crystalline powder, soluble in water, slightly odorous, insoluble in ethanol, insoluble in organic solvents such as ether. Melting point 240 ℃, monoclinic system. Cysteine is one of the sulfur-containing amino acids, which is a non-essential amino acid. In the organism, the sulfur atom of methionine is replaced with the hydroxyl oxygen atom of serine, and it is synthesized through cystathionine. From cysteine, glutathione can be generated. glycerol. Cysteine is acid stable, but is easily oxidized to cystine in neutral and alkaline solutions.
Physiological function
1. It has a cohesive effect in the living body, so it is effective for a wide range of poisons such as formaldehyde, acetaldehyde, chloroform, carbon tetrachloride, lead, cadmium, methylmercuric chloride, lipid peroxide, PCB, tetrodotoxin, alcohol, etc. The detoxification effects of these have been experimentally demonstrated.
2. Effectively prevent and treat radiation damage.
3. It maintains the activity of important sulfhydrylase in the keratin production of skin proteins, and supplements sulfur groups to maintain the normal metabolism of the skin and regulate the underlying melanin produced by the pigment cells in the lowest layer of the epidermis. It is a very ideal natural whitening. cosmetic. It can remove the melanin of the skin itself, change the nature of the skin itself, and make the skin whiten naturally.
4. Whenever inflammation or allergy occurs and the sulfydrylase such as cholphosphatase decreases, L-cysteine supplementation can maintain the activity of the sulfydrylase and improve the skin symptoms of inflammation and allergy.
5. It has the effect of dissolving keratin, so it is also effective for skin diseases with keratin hypertrophy.
6. It has the function of preventing biological aging.
7. It is mainly distributed in the liver, spleen and kidney, and also accumulates in a large amount on the surface of the human body including the skin, mucous membranes, and the surface of the digestive tract, etc. When foreign bodies including oral ingestion, inhalation from the atmosphere, and skin contact invasion can invade Strengthen the defense ability of the organism itself and adjust the defense mechanism of the organism.
Purpose
1. In cosmetics: used in the production of perm essence, sunscreen, perfume, hair nourishing essence, etc. This kind of advanced perm essence and cold perm essence, which replaces thioglycolic acid with cysteine, is easy to perm, easy to maintain hairstyle, soft and not It can also prepare sunscreen and hair growth perfume;
2. In medicine: cysteine is mainly used in liver medicine, antidote, expectorant and other medicines. Cysteine and its derivatives can be used for liver poisoning and detoxification, antipyretic and analgesic, ulcer treatment, fatigue recovery, infusion and comprehensive amino acid preparations, etc., especially for expectorating phlegm; treating bronchitis and reducing phlegm.
3. In food: bread fermentation accelerator, preservative. Cysteine is used as fermentation aid, antioxidant and stabilizer for milk powder and fruit juice, and nutritional additive for pet food;
4. L-cysteine can be used as the raw material for the production of N-acetyl-L-, carboxymethyl cysteine and other cysteine derivatives.
5. Accelerates the formation of gluten and prevents aging; it can be used in natural juices to prevent the oxidation and browning of VC; it has detoxification effects on acrylonitrile and aromatic acidosis. Prevent radiation damage.
Contrastive identification
L-cysteine cysteine L-cysteine base
L-cysteine is an isomer of cysteine, L and D represent the relative positions of functional groups of chiral compounds, not levorotatory and dextrorotatory. Its actual chirality needs to be determined experimentally, eg L-cysteine is a dextrorotatory compound.
L-cysteine can be used as an amino acid fortifier, but cysteine can be converted from methionine, so it is not a mandatory amino acid, and it is meaningless as an amino acid fortifier.
L-cysteine base is an alkaloid. L-cysteine base is mostly used in medicine and is also an additive.
