TONB_NEIGO MDKERILTPAVVFSVALLHLAIVALLWQAHKLPVIESGNVIEFVDLGDFGGGGGAPEGAGAPAAPEPQPAPDPPKPVEPPKPVLKPAVTKKADADIQQPKEKPKPEEKPKPEPEPEAKPAPKPAEKPAEKPSEKPAEHSGNASAKAGSEQGNGEGKGTGTKGDGTGRGEGSGKGSGGAKGEHGEGAGGSGGGTGVGSSKGNPLRANGSIPRPAYPALSMENDEQGMVVLSVLVSPGGHVESVKVVKSSGFSRLDNAARKAAQNGHFQANAWTEFKVPVKFELN tonB 283 Protein tonB Pathways of utilization of iron bound to transferrin, lactoferrin and hemoglobin but not to haemin or citrate where dependent on the tonB system.