siderophore-iron transmembrane transporter activity siderophore uptake transmembrane transporter activity ferrioxamine uptake transmembrane transporter activity siderophore-iron uptake transmembrane transporter activity GO:0015344 molecular_function siderochrome-iron (ferrioxamine) uptake transporter Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: siderophore-iron(ferrioxamine)(out) + H+(out) = siderophore-iron(ferrioxamine)(in) + H+(in).