Biophysics of Photoreceptors and Photomovements in by Wilhelm Nultsch (auth.), F. Lenci, F. Ghetti, G. Colombetti,

By Wilhelm Nultsch (auth.), F. Lenci, F. Ghetti, G. Colombetti, D.-P. Häder, Pill-Soon Song (eds.)

This quantity comprises the lectures given on the NATO complex examine Institute on "Biophysics of Photoreceptors and Photomovements in Microorganisms" held in Tir­ renia (Pisa), Italy, in September 1990. The Institute was once subsidized and regularly funded via the medical Affairs department of NATO; the actual technology Committee and the Institute of Biophysics of nationwide learn Council of Italy additionally supported the college and considerably contributed to its good fortune. it really is our friendly accountability to thank those institu­ tions. Scientists from very various backgrounds contributed to the certainty of this quickly constructing box of analysis, which has visible significant growth over the last years. The components of craftsmanship ranged from behavioral sciences, supported via sophi­ sticated ideas resembling picture research or laser mild scattering, to spectroscopy, ap­ plied, in several time domain names, to the examine of the first photoreactions, to electro­ body structure, biochemistry or molecular biology, with the purpose of reading a number of the steps of the transduction chains and the way they keep an eye on the motor equipment of the cells. The organisms studied coated a variety, from micro organism to algae, fungi and different eukaryotes. hence, the ASI represented a winning chance for wearing on and imple­ menting an interdisciplinary method of the learn of the biophysical foundation of photore­ ception and photosensory transduction in aneural organisms, with designated recognition to the fundamental phenomena and the underlying molecular occasions. we are hoping that this e-book has stuck the spirit within which the ASI was once conceived.

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In: "Sensory Perception and Transduction in Aneural Organisms," G. Colombetti, F. Lenci, and P. S. , NATO ASI Series A, Life Sci. Vol. 89, Plenum, New York. pp. 47. Song, P. , 1987, Possible primary photoreceptors. in: ''Blue Light Responses: Phenomena and Occurrence in Plants and Microorganisms," H. , vol. II, CRC Press, Boca Raton, FL. pp. 3. Song, P. , 1988, The molecular topography of phytochrome: Chromophore and apoprotein, I. Photochem. Photobiol. , 2:43. Molecular Properties of Biological Light Sensors 41 Song, P.

Fortunately, neither has been definitively established in terms of molecular characterization and mechanism (photochemical basis) of specific photosensors involved in blue light responses. However, there is good evidence that phototropic responses to blue light in higher plants (for review, Song and Pof£, 1989) and in Phycomyces (for review, Lipson and Horwitz, 1990) are based on a flavin as the photosensor chromophore. At present, only one photobiological reaction has been chemically identified with a flavin photoreceptor.

A comparative study of small (60 kdalton) and native (124 kdalton) phytochromes from oat, Photochem. , 41:681. , Song, P. , Johansen, J. , 1977, Linear dichroic spectra of crossconjugated carotenals and configurations of in-chain substituted carotenoids, I. Am. Chern. , 99:5609. Chai, Y. , Song, P. , and Pratt, L. , 1987, Biochemistry, 26:4947. , and Santus, R, 1981, Photophysical and photosensitizing properties of 2-amino-4-pteridone: a natural pigment, Photochem. , 33:641. Choi, J. , and Song, P.

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