Dimerization level of viral RNA isolated from viruses purified from 10 petri dishes. Experimental conditions as in Fig. 3 except for 5 h electrophoresis. (A) G247C, MB1, MB2, MB3, MB4, MB6, MB7, MB8, M5′B9, MB9, M5′B10 and MB10 genomic RNA. (B) BH10, Δ4AU, ΔH3, C258GΔP1, ΔP1, M5′I-2, M5′I-1, MI-1, Δ200–226, Δ236–242, and ΔSD genomic RNAs.