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PHOTORECEPTOR PROTEINS AND PIGMENTS IN THE PARAFLAGELLAR BODY OF THE FLAGELLATE Euglena gracilis
Article first published online: 2 JAN 2008
Photochemistry and Photobiology
Volume 52, Issue 4, pages 865–871, October 1990
How to Cite
Brodhun, B. and Hader, D.-P. (1990), PHOTORECEPTOR PROTEINS AND PIGMENTS IN THE PARAFLAGELLAR BODY OF THE FLAGELLATE Euglena gracilis. Photochemistry and Photobiology, 52: 865–871. doi: 10.1111/j.1751-1097.1990.tb08695.x
- Issue published online: 2 JAN 2008
- Article first published online: 2 JAN 2008
- Received 17 January 1990; accepted 6 March 1990
Abstract— –The presumed photoreceptor for phototaxis, the paraflagellar body, in the flagellate Euglena gracilis, was isolated still attached to the flagellum. After solubilization, fast protein liquid chromatography (FPLC) analysis yielded four major protein fractions with the chromophoric groups still attached. Fluorescence spectra showed that three fractions had excitation peaks at 380 nm and emission peaks around 450 nm indicative of pterins, while the fourth chromoprotein had a fluorescence emission at 520 nm and an excitation peak at 450 nm, indicative of a flavin. The separated proteins were analyzed by gel electrophoresis: the pterin binding proteins have apparent molecular masses between 27 000 and 31 600 and the flavin binding protein has an apparent molecular mass of 33 500.