Different spectral signatures of octapeptide 3(sub 10-) and alpha-helices revealed by two-dimensional infrared spectroscopy

Article Abstract:

Suppression of diagonal peaks by controlling polarizations of infrared pulses reveals cross-peak patterns that are crucial for structural determination. A doublet feature is observed when the peptide ester forms a 3(sub 10-) helix in CDCI(sub 3) and trifluoroethanol and when it is at the initial stage of 3(sub 10-) to an alpha-helix transition in 1,1,1,3,3,3-hexafluoro-2-propanol.

All Other Basic Organic Chemical Manufacturing, Esters, Salts & Halides NEC, Usage, Peptides, Infrared spectroscopy, Esters, Monomers, Chemical properties

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Differences in solution behavior among four semiconductor-binding peptides

Article Abstract:

All-atom Monte Carlo simulations with implicit solvent are used to investigate the behavior in aqueous solution of four semiconductor-binding peptides. These synthetic peptides have shown similar behavior with respect to structure as well as thermodynamics and at room temperature, they are largely unstructured but have a small but significant [alpha]-helix content.

Analysis, Polypeptides, Spectra, Thermal properties, Thermodynamics, Monte Carlo method, Monte Carlo methods, Circular dichroism

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