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J Bacteriol. 1966 December; 92(6): 1779-1786
Copyright © 1966 American Society for Microbiology. All Rights Reserved.

Structure of the Ribonucleic Acid Bacteriophage R17

Laboratorie de Microscopie Electronique, Institut de Recherches sur le Cancer, Villejuif, Seine, France
Department of Pathology, University of Colorado, School of Medicine, Denver, Colorado

ABSTRACT

VASQUEZ, CESAR (Institut de Recherches sur le Cancer, Villejuif, Seine, France), NICOLE GRANBOULAN, AND RICHARD M. FRANKLIN. Structure of the ribonucleic acid bacteriophage R17. J. Bacteriol. 92:1779–1786. 1966.—The morphology of bacteriophage R17 was studied by electron microscopy of negatively stained virions. The hexagonal shape, the presence of a maximum of 10 units at the periphery, and especially the observation of central fivefold points of symmetry with neighboring five and six coordinated units indicated icosahedral symmetry with 32 morphological units. Although the exact shape of the polyhedron could not be specified, the number of morphological units agreed with the chemically estimated number of structural units.

¹ Present address: Department of Biochemistry, New York University School of Medicine, New York, N.Y.

² Present address: The Public Health Research Institute of the City of New York, Inc., Foot of East 16th Street, New York, N.Y.