Circular dichroism of poly-D-glutamic acid adsorbed on air-water interfaces.
A quartz cuvette was modified for use to determine the circular dichroism of molecules in thin films at airwater interfaces. By an application of the cuvette, circular dichroism spectra of poly-D-glutamic acid at air-water interfaces have been compared with circular dichroism spectra of the sample in aqueous solution. The results show that poly-D-glutamic acid is a beta structure on the surface of the solution in which the alpha helix or random coil is stable.
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