Siderophors are iron-binding agents that transport iron into cells. Although the

Question

Siderophors are iron-binding agents that transport iron into cells. Although there are structural differences among different siderophores they generally all share the property of:

A. binding extracellular ferrous iron (in its +2 oxidation state) and releasing it in the cytoplasm of the cells as ferric iron (in its +3 oxidation state).

B. binding extracellular ferric iron (in its +2 oxidation state) and releasing it in the cytoplasm of the cell as ferrous iron (in its +3 oxidation state).

C. binding extracellular ferric iron (in its +3 oxidation state) and releasing it in the cytoplam of the cell as ferrous iron (in its +2 oxidation state).

D. binding extracellular ferrous iron (in its +3 oxidation state) and releasing it in the cytoplasm of the cell as ferric iron (in its +2 oxidation state).

Explanation / Answer

C. binding extracellular ferric iron (in its +3 oxidation state) and releasing it in the cytoplam of the cell as ferrous iron (in its +2 oxidation state).

They foem tight and stable complexes with ferric ion.

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