irradiation with long wavelength uv light in the presence of 4'-substituted psoralens abolished the in fectivity of reovirus and reovirus subviral particles photoreaction of intact virions , cores , or genome rna resulted in the formation of psoralen monoadducts and cross-links , demonstrating that the viral genome rna in situ is double-stranded .
C0035668
rna
C0035736
viral