By M. J. Carlile (auth.), Professor Dr. Horst Senger (eds.)
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Extra resources for The Blue Light Syndrome
After Nultsch et al. 1971) spectrum of Nitzschia communis was measured by Nultsch (1971). It shows maxima at 430 and 490 nm in the visible region, but strongest activity in the near UV with a maximum around 380 nm (Fig. 8). This action spectrum favors flavins as photoreceptors. The phototactic action spectrum of Porphyridium cruentum, measured by Nultsch and Schuchart (unpublished) most recently, shows a maximum at 443 and shoulders at 416 and around 470 nm, but no peak in the UV at 370 nm (Fig.
After Diehn 1969; from Häder 1979) w. ,," Cl. U1 Cl> .... ,.. / PIJ-tym1nos , -, - , \\ ,/ Cl(/) I; (l) 50 1,1 " \I (l) \1 f I! lello \\ I I 50 > ~'~ , 0 Cl> = 475 100 (l) 0 400 450 500 550 "'" nm 600 Fig. 3. Phototactic action spectra of Platymonas subcordiformis, Dunaliella viridis, and Stephanoptera gracilis_ Abscissa wavelength in nm; ordinate relative response. (After Hallda11968) 0 400 500 nm Fig. 4. Phototactic action spectrum of Peridinium trochoideum and Goniaulax catenella. Abscissa wavelength in nm, ordinate relative response.
It is hoped that forthcorning information may give more insight into the structural and functional relationship of the light driven proton pump . Acknowledgments. We wish to thank E. Lighthart, Arete Instruments, San Diego, for programming the computer system. The advise of Dr. A. Boschetti for setting up the Halobacterium halobium culture is greatefully acknowledged. This work was supported by the Swiss National Science Foundation (grant Nro. 77) and by the Central Laboratories of the Swiss Blood Transfusion Service SRK, Bern, Switzeriand.