title: The tonB gene product in Escherichia coli. Energy-coupling or molecular processing of permeases?
mesh_terms: D000483:Alleles; D003087:Colicins / Q000235:genetics; D004758:Enterobactin / Q000235:genetics; D004926:Escherichia coli / Q000235:genetics* / Q000378:metabolism; D005796:Genes; D026901:Membrane Transport Proteins / Q000235:genetics*; D014805:Vitamin B 12 / Q000378:metabolism
chemical_list: D003087:Colicins; D026901:Membrane Transport Proteins; D004758:Enterobactin; D014805:Vitamin B 12