Cysteine
Jump to navigation
Jump to search
Cysteine is one of the twenty common amino acids. It is one of two amino acids which contain a sulfur atom, the other being methionine, and is one of the two amino acids which contain a hydroxyl group, the other being threonine. Cysteine is a precursor of methionine in the activated methyl cycle, and it is synthesized from a condensation reaction between the amino acid serine and homocysteine.