Influence of molecular weights of bacteriophage phi 6 double-stranded ribonucleic acids on interferon induction

The interferon-inducing capabilities of the three molecular segments of bacteriophage phi6 double-stranded ribonucleic acid increased with increasing molecular weight.

Inactivation of encephalomyocarditis virus in aerosols: fate of virus protein and ribonucleic acid

After aerosolization at relative humidities of 50% or lower, encephalomyocarditis virus is rapidly inactivated. In this process the protein coat of the virion is damaged. This appears as a loss of hemagglutination activity and loss of affinity for hemagglutination inhibiting antibodies. The ribonucleic acid of the virus retains its infectivity but it becomes susceptible to ribonuclease. It sediments in sucrose gradients when centrifuged at high speed with the same velocity as free infectious ribonucleic acid extracted with phenol from intact encephalomyocarditis virus.

Structure and infectivity of picornaviral RNA encapsidated by cowpea chlorotic mottle virus protein

Poliovirus and Mengo virus RNA were shown to associate efficiently with cowpea chlorotic mottle virus protein to form pseudovirions. The sedimentation coefficient for the pseudovirions was similar to that of poliovirus, and electron microscope observations showed the Mengo pseudovirions to be similar in size to Mengo virus. Such pseudovirions were infectious and were more resistant to ribonuclease than viral RNA; however, under our assay conditions, their infectivity was about equal to that of viral RNA.