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

P22629 — Streptavidin