This tripeptide is synthesized from glutamate, cysteine (SIS-teen), and glycine. For 10 points each:
[10m] Name this prolific antioxidant, a thiol (THY-all) compound that is oxidized to GSSG to neutralize free radicals and reactive oxygen species.
ANSWER: glutathione (gloo-tuh-THY-ohn) [or GSH]
[10e] When oxidized, two glutathione molecules form covalent linkages between atoms of this element on cysteine's side chain. This nonmetal is found in thiols such as those in skunk spray.
ANSWER: sulfur [or S; prompt on disulfide]
[10h] Glutathione is a cofactor for this family of human enzymes that incorporate selenocysteine in their structure, necessitating dietary sources of selenium.
ANSWER: glutathione peroxidases [prompt on GPx]
<June Yin , Science - Biology - Cell/Molecular>