This is a sub-family of bacterial binding protein-dependent transport systems family. This Pfam entry contains the inner components of this multicomponent transport system.

1: Nucleotide sequences of the fecBCDE genes and locations of the proteins suggest a periplasmic-binding-protein-dependent transport mechanism for iron(III) dicitrate in Escherichia coli. Staudenmaier H, Van Hove B, Yaraghi Z, Braun V; J Bacteriol 1989;171:2626-2633. PMID:2651410