The molecule is a thioselenide in which a selenium atom is attached to the sulfur atoms of two molecules of glutathione. It is an initial metabolite of selenite, SeO3(2-). It has a role as a metabolite and an Escherichia coli metabolite. It is a thioselenide and a glutathione derivative. It derives from a glutathioselenol. It is a conjugate acid of a selenodiglutathione(2-).
(2S)-2-amino-5-[[(2R)-3-[(2R)-2-[[(4S)-4-amino-4-carboxybutanoyl]amino]-3-(carboxymethylamino)-3-oxopropyl]sulfanylselanylsulfanyl-1-(carboxymethylamino)-1-oxopropan-2-yl]amino]-5-oxopentanoic acid