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Published April 1971 | Published
Journal Article Open

Defective Interfering Particles of Poliovirus I. Isolation and Physical Properties

Abstract

A class of defective interfering (DI) poliovirus particles has been identified. The first was found as a contaminant of a viral stock; others have been isolated by serial passage at a high multiplicity of infection. The DI particles are less dense than standard virus and sediment more slowly. Their ribonucleic acid (RNA) sediments more slowly than standard RNA and has a higher electrophoretic mobility. Competition hybridization experiments with double-stranded viral RNA indicate that DI RNA is 80 to 90% of the length of standard RNA. The proteins of DI particles are indistinguishable from those of standard poliovirus.

Additional Information

© 1971 American Society for Microbiology. Received for publication 8 January 1971. We would like to thank David Rekosh for his participation in the accident leading to the initial discovery of poliovirus DI, and Alice S. Huang for critical reading of the manuscript. This work was supported by Public Health Service grant Al-08388 from the National Institute of Allergy and Infectious Diseases. C. N. C. was a predoctoral fellow of the National Science Foundation and D. B. was a Faculty Research Awardee of the American Cancer Society.

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Created:
August 19, 2023
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October 18, 2023