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. 2004 Feb;86(2):1028–1041. doi: 10.1016/s0006-3495(04)74178-8

FIGURE 3.

FIGURE 3

CD titration spectra of the AT hairpin with berenil or CGP 40215A. Strong positive-induced CD is observed above 300 nm with berenil (top), but weak negative CD (at low ligand/DNA) is observed for CGP 40215A (middle). The induced CD signals at 327 nm and 390 nm for berenil and at 320 nm for CGP 40215A are plotted against the ligand/DNA(basepairs) ratios (bottom). The break at ∼0.2 corresponds to two berenil molecules per one AT hairpin whereas the most induced negative CD signals are observed at a ratio (r = 0.1) equivalent to one CGP molecule per one AT hairpin.