title: Photobleaching of the resonance Raman lines of cytochromes in living yeast cells.
abstract: The photobleaching of the resonance cytochrome Raman lines in living Saccharomyces cerevisiae cells was studied. The photobleaching rate versus the irradiation power was described by square function plus a constant in contrast to the linear dependence of the photoinjury rate. This difference distinguishes the cytochrome photooxidation from other processes of the cell photodamage. The square dependence is associated with the reaction involving two photogenerated intermediates while the constant with the dark redox balance rates. This work demonstrates a potential of Raman spectroscopy to characterize the native cytochrome reaction rates and to study the cell photodamage precursors.
authors.affiliation: Institute of Automation and Electrometry, Russian Academy of Sciences, Novosibirsk 630090, Russia.
authors.forename: Konstantin A
authors.initials: KA
authors.lastname: Okotrub
authors.affiliation: Institute of Automation and Electrometry, Russian Academy of Sciences, Novosibirsk 630090, Russia. Electronic address: lab21@iae.nsk.su.
authors.forename: Nikolay V
authors.initials: NV
authors.lastname: Surovtsev
mesh_terms: D003580:Cytochromes / Q000737:chemistry*; D007700:Kinetics; D007834:Lasers; D010084:Oxidation-Reduction; D038761:Photobleaching / Q000528:radiation effects; D012441:Saccharomyces cerevisiae / Q000737:chemistry* / Q000378:metabolism / Q000528:radiation effects; D013059:Spectrum Analysis, Raman
chemical_list: D003580:Cytochromes