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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 50, Iss. 1 — Jan. 1, 1996
  • pp: 78–85

Secondary Structure of Bovine Albumin as Studied by Polarization-Sensitive Multiplex CARS Spectroscopy

Artemy Voroshilov, Cees Otto, and Jan Greve

Applied Spectroscopy, Vol. 50, Issue 1, pp. 78-85 (1996)


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Abstract

The first application of polarization-sensitive multiplex coherent anti-Stokes Raman spectroscopy (MCARS) in the absence of resonance enhancement to the resolution of the secondary structure of a protein in solution is reported. Polarization MCARS spectra of bovine albumin in D2O were obtained in the range 1370 to 1730 cm-1 with the aid of the background suppression technique. The spectra were fitted simultaneously with a single set of parameters (band positions, bandwidths, amplitudes, and depolarization ratios). Polarized Raman spectra simulated with these parameters revealed a good correspondence with the spontaneous Raman spectra measured. The broad amide I band was decomposed assuming the three major secondary conformations of protein, of which the contribution of β-sheet structure was found to be negligible. Relative weights of α-helix and random coil conformations agree well with the estimates obtained with Raman and circular dichroism (CD) spectroscopies.

Citation
Artemy Voroshilov, Cees Otto, and Jan Greve, "Secondary Structure of Bovine Albumin as Studied by Polarization-Sensitive Multiplex CARS Spectroscopy," Appl. Spectrosc. 50, 78-85 (1996)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-50-1-78

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