we analyzed the origin of free viral dna accumulating in the superinfected cultures , taking advantage of ( i ) the unique physical properties of the low-molecular-weight dna which , in the case of one of the cyp clones , accumulates during temperature shiftdown , and ( ii ) the differences between resident and superinfecting viral genomes in their susceptibilities towards restriction endonucleases .
C0012939
viral dna
C0012854
dna