the plasmid pml 21 , which was found to contain approximately 49 % of the col e1 genome was used to determine the template origin of single-stranded deoxyribonucleic acid ( dna ) fragments ( 4 to 32 % of the col e1 units length ) associated with col e1 dna replicative intermediates .
C0012935
single-stranded
C0012854
dna