Electron Microscope Study of Double-stranded Ribonucleic Acid of Influenza Virus Infected Cells

Department of Microbiology and Public Health, California State University, Los Angeles, California 90032, U.S.A. Virus-specific double-stranded RNA molecules extracted from x7 strain influenza virus infected cells were characterized by electron microscopy. Molecules 0.33, 0.67, and 1.0 µm in length were frequently observed, and possibly five or more subunits could be identified. * At present on leave at: Institute for Virology, University of Giessen, Schuberstrasse 1, 6300 Giessen, W. Germany. Received 21 March 1972; accepted 19 June 1972.