dna isolated from 20s material was open circular replicative form ( rf ) , dna in 50s material was replicative-form dna with an extended single-stranded viral dna that ranged up to one genome in length , and dna in 90s material consisted of circular and linear single-stranded viral dna of full genome length and single-stranded viral dna shorter than full genome length .
C0012939
dna
C0012854
dna