RT Journal Article SR Electronic(1) A1 Chevallier, Dominique A1 Engel, Andréas A1 Wurtz, Michel A1 Putz, CharlesYR 1983 T1 The Structure and Characterization of a Closterovirus, Beet Yellows Virus, and a Luteovirus, Beet Mild Yellowing Virus, by Scanning Transmission Electron Microscopy, Optical Diffraction of Electron Images and Acrylamide Gel Electrophoresis JF Journal of General Virology, VO 64 IS 10 SP 2289 OP 2293 DO https://doi.org/10.1099/0022-1317-64-10-2289 PB Microbiology Society, SN 1465-2099, AB SUMMARY Attempts were made to determine more precisely the structure and properties of a closterovirus, beet yellows virus (BYV), and a luteovirus, beet mild yellowing virus (BMYV), by scanning transmission electron microscopy, optical diffraction of electron images and acrylamide gel electrophoresis. It was shown that BYV has a mol. wt. of 76.5 × 106, including an RNA of 4.15 × 106. The pitch of the helix is 3.7 nm and there would be 8.5 protein subunits per turn. BMYV particles have a diameter of 26 nm and a total mol. wt. of 6.5(±0.45) × 106. The mol. wt. of the protein subunit is about 24000 and that of the RNA 2 × 106., UL https://www.microbiologyresearch.org/content/journal/jgv/10.1099/0022-1317-64-10-2289