we found that the closed circular dna fraction , extracted from monkey cells at 70 h after infection with nondefective sv40 at a multiplicity of infection of 6 pfu/cell , contained oversized molesules ( 1.1 to 2.0 fractional lengths of sv40 dna ) constituting about 8 % of the molecules having lengths equal to or shorter than sv40 dinner dna .
C0012925
circular dna
C0012854
dna