Curvature and charge modulations in Lamellar DNA-lipid complexes

Article Abstract:

A free energy functional that includes the electrostatic, lipid mixing, and elastic degrees of freedom in a self-consistent manner is used to model the possible formation of coupled spatial corrugations and charge density modulations in lamellar DNA- lipid complexes. It is found that the balance of forces favors membrane corrugations that are expected to be stable with respect to thermal membrane undulations for a certain range of lipid composition.

Lipids, Cations

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Enveloping of charged proteins by lipid bilayers

Article Abstract:

The ability of mixed lipid bilayers to envelop colloidal particles such as proteins provides a possible mechanism for drug delivery through cell membranes is studied. It is found that, using a simple theoretical approach, that enveloping of charged proteins is feasible for mixed (charged-neutral) lipid bilayers, provided the spontaneous curvature of the neutral lipid is not too far from the radius of the protein.

Proteins, Chemistry, Physical and theoretical, Physical chemistry, Lipid membranes, Colloid chemistry

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Charge transfer excited-state dynamic in DNA duplexes substituted with an ethynylpyrenyldeoxyuridine electron source and a fluorodeoxyuridine ron trap

Article Abstract:

Six DNA duplexes are studied at 10 degree Celsius, in order to observe PY(super .+)/dU(super .-) CT excited-state dynamics in them following photoexcitation at 355nm. The results suggest that the excess electron in the PY(super .+)/dU(super .-) state of U(super PY) is restrained from hopping to nearby U(super F) traps due to attraction to PY(super .+).

Charge transfer, Excited state chemistry, Chemical properties

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