cysteine

(redirected from L-cysteine)
Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to L-cysteine: L-cysteine hydrochloride

cysteine

 [sis-te´ēn]
a sulfur-containing amino acid, one of the nonessential amino acids, produced by enzymatic or acid hydrolysis of proteins; it is readily oxidized to cystine and is sometimes found in urine.

cys·te·ine (C, Cys),

(sis-tē'in), Do not confuse this word with cystine.
l-isomer of this acid is found in most proteins; especially abundant in keratin.

cysteine

/cys·te·ine/ (sis-te´ēn) a sulfur-containing, nonessential amino acid produced by enzymatic or acid hydrolysis of proteins, readily oxidized to cystine; sometimes found in urine. Symbols Cys and C.

cysteine

(sĭs′tə-ēn′, -ĭn, -tē-)
n.
An amino acid, C3H7O2NS, derived from cystine and found in most proteins.

cysteine (Cys)

[sis′tēn]
an amino acid containing a polar side chain found in many proteins in the body, including keratin. It is a metabolic precursor of cystine and an important source of sulfur for various body functions. Compare cystine.
enlarge picture
Chemical structure of cysteine

cys·te·ine

(C, Cys) (sis-tē'in)
An amino acid found in most proteins; especially abundant in keratin.

cysteine

An AMINO ACID present in most body proteins.
Cysteineclick for a larger image
Fig. 125 Cysteine . Molecular structure.

cysteine (C, Cys)

one of 20 AMINO ACIDS common in proteins that has a polar ‘R’ structure and is water-soluble. See Fig. 125 . The R group contains a sulphydryl (SH) group which is vital for the formation of DISULPHIDE BRIDGES in proteins. Disulphide bridges hold polypeptides together and give stability, especially in molecules such as KERATIN and IMMUNOGLOBULINS. The ISOELECTRIC POINT of cysteine is 5.1.

cys·te·ine

(C) (sis-tē'in) Do not confuse this word with cystine.
l-isomer of this acid is found in most proteins; especially abundant in keratin.

cysteine

a sulfur-containing amino acid produced by enzymatic or acid hydrolysis of proteins, readily oxidized to cystine; sometimes found in urine.
References in periodicals archive ?
On the other hand, L-cysteine and SAM significantly raised the level of [Ca in the medullary neurons while HA and/or AOAA produced a reversal effect.
Noncompetitive inhibition of cystathionine synthetase-serine dehydratase by elemental sulfur and competitive inhibition of cystathionine-homoserine dehydratase by L-cysteine and L-cystine.
Suitable ejaculates (=70% motility) of four bulls were pooled and then calculated semen quantity was added to the graduated tubes having specific amount of TCAE and L-cysteine (C7352 Sigma Aldrich USA) concentrations of 0.
The study for surface plasmon resonance of l-cysteine capped Ni NPs synthesized by the microwave assisted method was performed using a UV-Visible spectrophotometer model Lambda 2 of Perkin-Elmer, Germany.
According to news from BBC and VRG, the major source of L-cysteine today is human hair, duck feathers or hog hair is only used when the human hair supply is low, stated a manager of the company that produces non-animal L-cysteine.
Interestingly, after the treatment of L-cysteine or GSH to nodosin treated cells, this morphological change of the cells was masked and showed similar patterns to that of controls (Fig.
The highly effective antioxidant Glutathion, which is not well absorbed when taken by mouth, can be synthesized from the amino acids L-cysteine, L-glutatmic acid, and glycine.
L-cysteine is degraded in rumen by a microbial cystathionine [gamma]-lyase to generate sulphide, then, sulphur ion generated from sulphide can bind to W to form an insoluble inorganic compound.
magnesium ascorbyl phosphate, L-taurine, L-cysteine, L-methionine, L-tyrosine, gamma-aminobutyric acid (GABA), bee pollen, ascorbic acid (vitamin C), silica, essential oils, honey, citrus volatile oil and xylitol.
Maintenance of hepatic glutathione homeostasis and prevention of acetaminophen-induced cataract in mice by L-cysteine prodrugs.