digestion of plc/prf/5 cell dna with restriction endonuclease hindiii ( an enzyme found not to cleave the dna of any hbv isolate so far examined ) yielded only three fragments , all larger than virion dna , which contained hbv dna base sequences , suggesting that hbv dna is integrated in high-molecular-weight dna at three different sites in these cells and that there is no viral dna in an episomal form .
C0012854
dna
C0012939
viral dna