title: Freeze etch morphology of outer membrane mutants of Escherichia coli K12.
abstract: Freeze etching showed that the loss of each of the major outer membrane proteins b, c or d in mutants of Escherichia coki K12 does not influence the morphology of fracture faces of the outer membrane. Mutants that possess a heptose-deficient lipopolysaccharide and which in addition are deficient in one or more major outer membrane proteins exhibit a reduction in the number of intramembranous particles of the outer membrane. Moreover it was shown that lipid phase transitions induce a lateral lipid protein separation in the outer membrane, similar to that found in the cytoplasmic membrane.
mesh_terms: D001426:Bacterial Proteins / Q000378:metabolism*; D002462:Cell Membrane / Q000378:metabolism / Q000648:ultrastructure*; D004926:Escherichia coli / Q000378:metabolism / Q000648:ultrastructure*; D005613:Freeze Etching; D008854:Microscopy, Electron; D009154:Mutation; D013045:Species Specificity
chemical_list: D001426:Bacterial Proteins