Cysteine

Cysteine is an alpha-amino acid found in both plants and animals.

Biosynthesis and Function
In plants, Cysteine is biosynthesized by Serine. The Serine is converted into an Ester, and provided the plant has a source of Sulfides, that Ester then becomes Cysteine. Cysteine is important in plants, because in its L-isomer form (L-Cysteine) along with L-Glutamic Acid and Glycine, the plant can biosynthesize Glutathione, which is utilised in stress management and heavy metal chelation.

Cysteine contains a thiol (sulfur) group that is often used in enzymatic reactions; it is readily oxidized. When two or more Cysteine molecules are present during oxidization the Dimer Cystine is formed, which is responsible for protein formation.

PhtyoTech Products
L-Cysteine is available from PhytoTechnology Laboratories as Product Number C204

L-Serine is available from PhytoTechnology Laboratories as Product Number S807

L-Glutamic Acid is available from PhytoTechnology Laboratories as Product Number G399

Glycine is available from PhytoTechnology Laboratories as Product Number G503

Glutathione is available from PhytoTechnology Laboratories as Product Number G394

L-Cystine is available from PhytoTechnology Laboratories as Product Number C248