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Structural Study of Heme Proteins by Electron Microscopy of 2-Dimensional Crystals

  • Terrence G. Frey
Protocol
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Part of the Springer Protocols Handbooks book series (SPH)

Abstract

Characterization of membrane proteins has always lagged behind that of soluble proteins, because most techniques of protein purification and structural study depend upon having a water-soluble preparation. The development of myriad classes of detergents over the past decades has greatly facilitated the purification of integral membrane proteins and many of the techniques of structural characterization. Direct measurement of the 3-dimensional (3D) structures of integral membrane proteins has proceeded more slowly, but significant progress was made in the past 10 to 15 years, and the atomic structures of a number of membrane proteins are now known. Although X-ray crystallography and 2-dimensional (2D) nuclear magnetic resonance (NMR) spectroscopy have been used to elucidate the structures of thousands of soluble proteins, their utility in the structural study of membrane proteins has been limited by the difficulty of growing 3D crystals in the case of X-ray techniques or by the large size of protein-detergent micelles in the case of NMR spectroscopy.

Keywords

Cytochrome Oxidase Purple Membrane Thin Carbon Film Electron Crystallography Contrast Transfer Function 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
cmc

critical micelle concentration

CCD

charge-coupled device

CTF

contrast transfer function

S/N

signal to noise ratio

2D

two-dimensional

3D

three-dimensional

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Copyright information

© Humana Press, Totowa, NJ 2002

Authors and Affiliations

  • Terrence G. Frey
    • 1
  1. 1.San Diego State University San DiegoUSA

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