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. 1990 Aug;87(15):5903–5906. doi: 10.1073/pnas.87.15.5903

Fourier-transform Raman spectroscopy applied to photobiological systems.

J Sawatzki 1, R Fishcer 1, H Scheer 1, F Siebert 1
PMCID: PMC54437  PMID: 11607094

Abstract

Fluorescence and initiation of photoreactions are problems frequently encountered with resonance Raman spectroscopy of photobiological systems. These problems can be circumvented with Fourier-transform Raman spectroscopy by using the 1064-nm wavelength of a continuous wave neodymium-yttrium/aluminum-garnet laser as the probing beam. This wavelength is far from the absorption band of most pigments. Yet, the spectra of the investigated systems--bacteriorhodopsin, rhodopsin, and phycocyanin--show that these systems are still dominated by the chromophore, or that preresonant Raman scattering is still prevalent. Only for rhodopsin were contributions of the protein and the membrane discernible. The spectra of phycocyanin differ considerably from those obtained by excitation into the UV-absorption band. The results show the usefulness of this method and its wide applicability. In addition, analysis of the relative preresonant scattering cross sections may provide a detailed insight into the scattering mechanism.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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