Electron Microscopy of an Oligomeric Protein Stabilized by Polyfunctional Cross-Linking

  • C. N. Gordon
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 86A)


Oligomeric proteins can be intramolecularly cross-linked with polylysine in a reaction in which a water soluble carbodiimide mediates an amide linkage between the protein carboxyl groups and the ε-amino groups of polylysine. Studies carried out with a cytochrome P-450 indicate that a small number of molecules in a population which has been cross-linked in this way retain important features of their tertiary and quaternary structure when negatively stained and examined in the electron microscope. Use of the method in determining the subunit geometry of oligomeric proteins is discussed.


Quaternary Structure CROSSLINKED Protein Subunit Structure Amide Linkage Oligomeric Protein 
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Copyright information

© Plenum Press, New York 1977

Authors and Affiliations

  • C. N. Gordon
    • 1
  1. 1.Department of Molecular Biology and BiochemistryUniversity of CaliforniaIrvineUSA

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