Interaction of DNA with cationic vesicles: a calorimetric study

Article Abstract:

The interaction of DNA with vesicles of cationic lipids mixed with varying amounts of a zwitterionic lipid in dilute solutions was studied by isothermal titration microcalorimetry, differential scanning calorimetry and turbidity measurements. The status of the hydrocarbon chains, solid or fluid, has a pronounced effect on the enthalpy of interaction between DNA and cationic vesciles, in the formation of positively charged, lipid-enriched aggregates.

Cations

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The hydration of a DNA-Amphiphile complex

Article Abstract:

The measurements of isothermal DNA-hexadecyltrimethylammonium (DNACTA) complex and pure DNA hydration at 25 degrees Celsius using a sorption microcalorimeter are presented. The hydration of the complex shows a balance between the attractive electrostatic interaction causing the formation of the complex and a repulsive component arising from a hexagonal deformation of CTA(super +1) cylinders.

Analytical Laboratory Instrument Manufacturing, Laboratory apparatus and furniture, Calorimeters, Usage, Electrostatics

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A calorimetric and spectroscopic study of DNA at low hydration

Article Abstract:

The thermal properties and thermal denaturation of salmon testes NaDNA at low water contents, corresponding to bound water only (1.0 to 12 wpn (water molecules per nucleotide)) is analyzed using differential scanning calorimetry (DSC) and infrared spectroscopy (IR). The results of DSC and IR showed cooperativity of thermal DNA denaturation at 12 wpn.

Infrared spectroscopy, Molecules, Properties

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