UV spectra of E. coli genomic DNA in the presence of increasing amounts of polybia-CP. E. coli genomic DNA was treated with increasing amounts of polybia-CP (peptide concentrations were 0 μM, 5 μM, 10 μM, 15 μM, 25 μM, and 50 μM). UV spectra were measured in the range of wavelengths from 220 to 320 nm. All measurements were made at a 10-mm optical path length at room temperature.