title: Pleiotropic transport mutants of Escherichia coli lack porin, a major outer membrane protein.
mesh_terms: D001426:Bacterial Proteins / Q000235:genetics*; D001692:Biological Transport; D002463:Cell Membrane Permeability; D002874:Chromosome Mapping; D002876:Chromosomes, Bacterial; D004926:Escherichia coli / Q000378:metabolism; D005796:Genes; D008565:Membrane Proteins / Q000235:genetics*; D009154:Mutation; D010641:Phenotype
chemical_list: D001426:Bacterial Proteins; D008565:Membrane Proteins