ACID-BASE AND REDOX PROPERTIES OF BLEPHARISMIN PHOTORECEPTOR PIGMENTS- A PULSE-RADIOLYSIS AND FLASH-PHOTOLYSIS STUDY

Authors
HEELIS PF PARSONS BJ GHETTI F LENCI F ROWLEYWILLIAMS CA NAMAN S NAVARATNAM S
Citation
Pf. Heelis et al., ACID-BASE AND REDOX PROPERTIES OF BLEPHARISMIN PHOTORECEPTOR PIGMENTS- A PULSE-RADIOLYSIS AND FLASH-PHOTOLYSIS STUDY, Journal of photochemistry and photobiology.B, Biology, 24(1), 1994, pp. 41-45
Citations number
15
Categorie Soggetti
Biophysics,Biology
Journal title
Journal of photochemistry and photobiology.B, Biology → ACNP
ISSN journal
10111344
Volume
24
Issue
1
Year of publication
1994
Pages
41 - 45
Database
ISI
SICI code
1011-1344(1994)24:1<41:AARPOB>2.0.ZU;2-H
Abstract
Laser flash photolysis spectra of chromophore extracts from Blepharism a japonicum cells have been measured. The variation of the triplet sta te spectra with pH is reported and the related pK(a) values of 2-3 for deprotonation of the excited triplet state was determined. The anioni c Blepharismin triplet state does not appear to readily undergo one-el ectron reduction by mild reducing agents, but undergoes oxidation by b enzoquinone. Pulse radiolysis has been used to independently determine the spectra of the one-electron reduced and one-electron-oxidised for ms of Blepharismin.