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. 2017 Dec 12;7:17383. doi: 10.1038/s41598-017-17643-0

Figure 3.

Figure 3

Dpo4 binding conformation of the (+)-cis-B[a]P-N 2-dG modified template. (a) smFRET histograms with increasing DMSO to monitor its effect on Dpo4 binding for the unmodified and modified DNAs. All histograms are fit to bimodal distributions. (b) Relative fraction area of high FRET state as a function of DMSO percentage in the buffer. Solid lines represent linear fits to the data. DMSO stabilizes the low FRET conformation for the adducted DNA but not the unmodified DNA. (c) Dpo4 dissociation rate constant (k off) as function of DMSO concentration. DMSO stabilized the modified binary complex but not with the unmodified DNA.