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Structure of sulfide-reacted heme moieties in globins. (a) Structure of ferric heme moiety (light orange sticks) in human hemoglobin with bound HS− (yellow sphere); PDB entry: 5UCU [115]. (b) Structure of sulfheme moiety (light blue sticks) generated by reaction of horse myoglobin and sulfide, resulting in sulfmyoglobin; PDB entry 1YMC [239].
