employing nick-translated radioactive viral dna purified from productively infected papillomas on cotton tail rabbits as a probe , it was found that ( i ) papillomas , primary carcinomas , and metastatic carcinomas contain 10 to about 100 copies of the viral genome per diploid cell equivalent of dna and ( ii ) viral dna is present in detectable amounts in essentially all neoplastic cells .
C0012854
dna
C0012939
viral dna