Fourier transform infrared spectrum of the radical cation of beta-carotene photoinduced in photosystem II.
A Fourier-transform infrared (FTIR) spectrum of the radical cation of beta-carotene photoinduced in photosystem II (PSII) membranes was obtained at 80K under oxidizing conditions, by utilizing the light-induced FTIR difference technique. Formation of the beta-carotene cation was monitored with the electronic absorption band at 993 nm. An FTIR spectrum of a chemically-generated beta-carotene cation in chloroform was also measured and compared with the spectrum of PSII. Since the FTIR bands of carotenoid cation have characteristic features with strong intensities, they can be useful markers in studying the reaction of carotenoid in PSII.
Noguchi
T
T
Solar Energy Research Group, Institute of Physical and Chemical Research (Riken), Saitama, Japan.
Mitsuka
T
T
Inoue
Y
Y
D002338:Carotenoids / Q000737:chemistry* / Q000528:radiation effects; D005609:Free Radicals; D008027:Light; D010084:Oxidation-Reduction; D045322:Photosynthetic Reaction Center Complex Proteins / Q000378:metabolism* / Q000528:radiation effects; D045332:Photosystem II Protein Complex; D013053:Spectrophotometry; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D018724:Spinacia oleracea; D019207:beta Carotene
D005609:Free Radicals; D045322:Photosynthetic Reaction Center Complex Proteins; D045332:Photosystem II Protein Complex; D019207:beta Carotene; D002338:Carotenoids