Table 2. Fluorescence intensities of 2-OH-E⁺ and E⁺ in the presence and absence of DNA at selected wavelengths.

Samples	Ex, nm	Em, nm	Intensity, au
2-OH-E+	510	590	3.09
	490	590	5.55
E+	510	590	2.02
	490	590	2.77
2-OH-E+/DNA	510	590	61.93
	490	590	63.41
	494	567	99.99
E+/DNA	510	590	30.95
	510	610	24.25
	490	590	25.83
	494	567	18.16

2-OH-E⁺ (10 μM) and E⁺ (10 μM) were used in the measurement of intensities. Intensities of E⁺ and 2-OH-E⁺ were obtained from data shown in ref. 5, and those of E⁺/DNA and 2-OH-E⁺/DNA were obtained from this study. Ex, excitation wavelength; Em, emission wavelength; au, arbitrary units.