Figure 52. A model of the myoglobin molecule based on X-ray crystallographic
data. We can deduce from the dimensions of this model, and from the known
number of amino acid residues in myoglobin, that certain portions of the polypeptide chain of myoglobin must be coiled to form an internal secondary structure. The gray disk-like structure shown in the photograph represents the
porphyrin prosthetic group, and the light- and dark-colored spheres represent
heavy-metal derivatives which were attached to the protein to facilitate analysis
of the diffraction data. Dr. J. C. Kendrew of the University of Cambridge
kindly furnished this photograph.
Questia, a part of Gale, Cengage Learning. www.questia.com
Book title: The Molecular Basis of Evolution.
Contributors: Christian B. Anfinsen - Author.
Place of publication: New York.
Publication year: 1959.
Page number: 98.
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