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The Electronic Spectroscopy of Photoreceptors (Other Than Rhodopsin)

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Photochemical and Photobiological Reviews

Abstract

A number of organisms ranging from prokaryotic bacteria to eukaryotic mammals directly respond to light of different wavelengths in terms of various photobiological reactions. A photobiological reaction entails the absorption of a specific wavelength of light by the functioning photoreceptor molecule within the photoreceptor organelle or apparatus. The general scheme of photoreceptor function is outlined diagramatically in Fig. 1. As can be seen from this figure, the photoreceptor molecule absorbs a specific wavelength of light, generating its electronically excited state from which primary molecular processes leading to the measureable photoresponse reaction of an organism proceeds. It is readily recognized that the electronic spectroscopy of photoreceptors plays an essential part in describing the mechanisms of photobiological processes at the molecular level. This review is intended to provide the reader with the current knowledge of the electronic excited states of various photobiological receptors, except rhodopsin and bacteriorhodopsin, which are extensively reviewed elsewhere (Birge, 1981, and references therein).

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Song, PS. (1983). The Electronic Spectroscopy of Photoreceptors (Other Than Rhodopsin). In: Smith, K.C. (eds) Photochemical and Photobiological Reviews. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-4505-3_2

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