In vivo absorption spectra of the two stable states of the Euglena photoreceptor photocycle (Articolo in rivista)

Type
Label
  • In vivo absorption spectra of the two stable states of the Euglena photoreceptor photocycle (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1111 / j.1751-1097.2007.00438.x (literal)
Alternative label
  • Laura Barsanti1, Primo Coltelli2, Valtere Evangelista1, Vincenzo Passarelli1, Anna Maria Frassanito1, Nicoletta Vesentini3, Fabrizio Santoro4 and Paolo Gualtieri*1 (2009)
    In vivo absorption spectra of the two stable states of the Euglena photoreceptor photocycle
    in Photochemistry and photobiology
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Laura Barsanti1, Primo Coltelli2, Valtere Evangelista1, Vincenzo Passarelli1, Anna Maria Frassanito1, Nicoletta Vesentini3, Fabrizio Santoro4 and Paolo Gualtieri*1 (literal)
Pagina inizio
  • 304 (literal)
Pagina fine
  • 312 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 85 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • In: Photochemistry and Photobiology, vol. 85 (1) pp. 304 - 312. Wiley-Blackwell, 2009. (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1Istituto di Biofisica, Pisa, Italy 2Istituto Scienza Tecnologia Informazione, Pisa, Italy 3Istituto Fisiologia Clinica, Pisa, Italy 4Istituto per i Processi Chimico-Fisici, Pisa, Italy (literal)
Titolo
  • In vivo absorption spectra of the two stable states of the Euglena photoreceptor photocycle (literal)
Abstract
  • Euglena gracilis possesses a simple but sophisticated light detecting system, consisting of an eyespot formed by carotenoids globules and a photoreceptor. The photoreceptor of Euglena is characterized by optical bistability, with two stable states. In order to provide important and discriminating information on the series of structural changes that Euglena photoreceptive protein(s) undergoes inside the photoreceptor in response to light, we measured the in vivo absorption spectra of the two stable states A and B of photoreceptor photocycle. Data were collected using two different devices, i.e. a microspectrophotometer and a digital microscope. Our results show that the photocycle and the absorption spectra of the photoreceptor possess strong spectroscopic similarities with a rhodopsin-like protein. Moreover, the analysis of the absorption spectra of the two stable states of the photoreceptor and the absorption spectrum of the eyespot suggests an intriguing hypothesis for the orientation of microalgae toward light. (literal)
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