Search results
Results from the WOW.Com Content Network
Cysteine, mainly the l-enantiomer, is a precursor in the food, pharmaceutical, and personal-care industries. One of the largest applications is the production of flavors. For example, the reaction of cysteine with sugars in a Maillard reaction yields meat flavors. [44] l-Cysteine is also used as a processing aid for baking. [45]
Cystine is the oxidized derivative of the amino acid cysteine and has the formula (SCH 2 CH(NH 2)CO 2 H) 2.It is a white solid that is poorly soluble in water. As a residue in proteins, cystine serves two functions: a site of redox reactions and a mechanical linkage that allows proteins to retain their three-dimensional structure.
L-cysteine production pathways; Reactants → Enzyme Cofactors Notes O-acetyl-L-serine/hydrogen sulfide → cysteine synthase [9] pyridoxal phosphate not present in humans L-cystine/2 glutathione → glutathione-cystine transhydrogenase [10] cystathionine: → cystathionine γ-lyase [4] pyridoxal phosphate 3-mercapto-pyruvate: → cysteine ...
γ-L-Glutamyl-L-cysteine, also known as γ-glutamylcysteine (GGC), is a dipeptide found in animals, plants, fungi, some bacteria, and archaea. It has a relatively unusual γ-bond between the constituent amino acids , L -glutamic acid and L -cysteine and is a key intermediate in the γ-glutamyl cycle first described by Meister in the 1970s.
In enzymology, a cystine reductase (EC 1.8.1.6) is an enzyme that catalyzes the chemical reaction 2 L-cysteine + NAD + ⇌ {\displaystyle \rightleftharpoons } L-cystine + NADH + H + Thus, the two substrates of this enzyme are L-cysteine and NAD + , whereas its 3 products are L-cystine , NADH , and H + .
What links here; Related changes; Upload file; Special pages; Permanent link; Page information; Cite this page; Get shortened URL; Download QR code
L-homoserine to form H 2 O, NH 3 and 2-oxobutanoate; L-cystine, producing thiocysteine, pyruvate and NH 3 [4] L-cysteine producing pyruvate, NH 3 and H 2 S; In some bacteria and mammals, including humans, this enzyme takes part in generating hydrogen sulfide.
The lysosomal cystine transporter (LCT) family is part of the TOG Superfamily and includes secondary transport proteins that are derived from animals, plants, fungi and other eukaryotes. They exhibit 7 putative transmembrane α-helical spanners ( TMSs ) and vary in size between about 200 and 500 amino acyl residues, although most have between ...