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. 2005 Mar 23;33(6):1790–1803. doi: 10.1093/nar/gki319

Figure 5.

Figure 5

Effect of polyamine on uranyl cleavage of plasmid pA5N15A5. (A) Selected densitometric scans of a titration experiment showing the uranyl cleavage in the absence and presence of 5, 25 and 500 μM spermine. The DNA sequence is annotated on the scan and the bend centre for each A-tract is indicated. (B) Differential cleavage plot comparing the susceptibility of the DNA fragment to uranyl cleavage in the absence and in the presence of 25 μM spermine. Black boxes indicate the position of the inhibition of uranyl cleavage in the presence of spermine.