the stimulative effect was decreased in the presence of larger amounts of poly ( da ) , poly ( dt ) or heat-denatured dna , whereas the excess of single-stranded dnas chemically modified with chloroacetaldehyde did not present such an inhibitory effect , despite the fact that a second dna molecule is likely to interact with reca as monitored by the intrinsic fluorescence of these dna species .
C0012935
single-stranded dnas
C0012854
dna