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. 2008 Dec 22;37(3):849–857. doi: 10.1093/nar/gkn1003

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© 2008 The Author(s)

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 3. — FTIR spectra and difference spectra [(DNA solution + lipid solution) − (DNA solution)] in the region of 1800 − 600 cm⁻¹ for the free calf-thymus DNA and free DOPE (A) and DOTAP (B) and their complexes in aqueous solution at pH 7.3 with various lipid/DNA(P) ratios (1/80 to 1/4) and constant DNA concentration (12.5 mM).