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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Physical and morphological characteristics of eucaryotic ribosomes and lipopolysaccharide complexes.

Lipopolysaccharides (LPS) from Pasteurella multocida or Brucella abortus were complexed with Aspergillus fumigatus ribosomes by mixing and fixation for 3 days in 3.8% formaldehyde. To investigate the nature of their physical association, ribosomes, LPS, and ribosome-LPS complexes were (i) centrifuged in CsCl gradients to determine buoyant densities, (ii) examined by electron microscopy, and (iii) monitored by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Ribosomes were found to bind to LPS from either P. multocida or B. abortus, producing complexes with densities of 1.45 to 1.50 g/ml. The buoyant density of the fixed ribosomes was 1.54 g/ml, and the buoyant densities of the fixed P. multocida and B. abortus LPS were 1.41 and 1.35 g/ml, respectively. Electron microscopy showed that formaldehyde-fixed ribosomes were attached to the LPS. Complexing of ribosomes to LPS may be of importance as a potentiator or carrier for experimental subunit vaccines.[1]


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