Siderophore-Iron Complexes Enter Cells with the Help Of

Question

Siderophore-iron complexes enter cells with the help of
A) porins.
B) diffusion.
C) aquaporins.
D) ABC transporters.
E) efflux pumps.

Accepted Answer

Siderophore-iron complexes are large molecules and therefore cannot passively diffuse through the cell membrane. Instead, they require active transport via specific membrane proteins called ABC (ATP-binding cassette) transporters. These transporters use energy from ATP hydrolysis to move the complex across the membrane.