Salomon R, Farias R. The peptide antibiotic microcin 25 is imported through the TonB pathway and the SbmA protein. J Bacteriol. 1995;177:3323-5 pubmed
..Phenotypic and mapping studies showed the mutations to be located in the fhuA, exb, tonB, and sbmA genes. The latter encodes a cytoplasmic membrane protein which is also required for the penetration of microcin B17. ..