{N-(2-{bis[(pyridin-2-yl-kappaN)methyl]amino-kappaN}ethyl)-5-[(3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl]pentanamide}(triaza-1,2-dien-2-ium-1-ide-kappaN~1~)iron(4+)

P22629 — Streptavidin