the observation that protein vii can be cross-linked to dna in cells infected at very low multiplicity , together with the results of a comparison of proteins cross-linkable to viral dna in cells infected by wild-type virus and a non-infectious mutant containing the precursor to protein vii , suggest that nucleoproteins comprising viral dna and protein vii must be the templates for expression of pre-early and early viral genes .
C0033665
precursor
C0033684
protein