Flourescene, circular dichroism, light scattering, and microscopic characterization of vesicles of sodium salts of three N-Acyl peptides

Article Abstract:

Self-assembly formation of sodium salts of three N-acyl peptide surfactants, sodium N-(4-n-dodecyloxybenzoyl)-L-alyl-L-valinate (SDBAV), L-valyl-L-alaninate (SDBVA), and l-valyl-L-valinate (SDBVV) are investigated. They are shown to spontaneously form large vesicles in dilute aqueous solution and the cac values of the amphiphiles are very low which implies that the free energy of formation of vesicles is lower.

Sodium salts, Aqueous solution reactions

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Interaction and lipid-induced conformation of two cecropin-melittin hybrid peptides depend on peptide and membrane composition

Article Abstract:

Differential scanning calorimetry (DSC), circular dichroism (CD), and quassi-elastic light scattering (QELS) were used to study the interaction of two hybrid peptides of cecropin A and melittin [CA(1-8)M(1-7) and CA(1-7)M(2-9)] with liposomes. The results indicate that, for both peptides, the interaction depended on membrane composition, with different behavior for zwitterionic and anionic membranes.

Peptides, Optical properties, Calorimetry

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Natural circular dichroism in X-ray spectroscopy

Article Abstract:

The theory of XNCD is discussed and the circular dichroism is shown to be due to the interference between the allowed electric dipole and electric quadrupole transition moments. For the study of both molecular and crystal structural enantiomorphism, this new spectroscopy represents as a useful extension to techniques.

X-ray spectroscopy

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