540257.fig.003a
(a)
540257.fig.003b
(b)
Figure 3: Raman spectra of natural B-DNA (top) and the DNA-lipid complex at room temperature and at 80°C. The solid arrows indicate the Raman peaks unique to the lipid complex. The dotted arrows indicated the peaks that contain contributions from both DNA molecules and the lipid complex. For detailed annotation of individual Raman bands, the readers are kindly asked to refer to literature, for example, [8, 18, 19]. The Raman bands corresponding to the lipid-complex did not show heating-induced shifting while certain DNA bands moved to lower wave numbers. The DNA P O 2 symmetric stretching mode remains at 1092 c m 1 throughout the measurements, indicating that the DNA molecules remains in their B-form without a significant change in the relative humidity around the molecules.