O svobodnoradikal'nykh tsentrakh v khromatoforakh i preparatakh reaktsionnykh tsentrov Rhodospirillum rubrum.

Translated title of the contribution: Free radical centers in the chromatophores and preparations of Rhodospirillum rubrum reaction centers

I. A. Smirnova, A. N. Tikhonov, A. A. Konstantinov, E. K. Ruuge

Research output: Contribution to journalArticlepeer-review

Abstract

The light-induced free radical ESR signals in chromatophores and reaction center preparation of R. rubrum were studied. It has been shown that the properties of the signals in both systems were strictly identical. At the microwave powers higher than 10 mW the ESR signal at g approximatley 2.00 is saturated and its asymmetry arises. Changes of the ESR signal shape may be explained by the superposition of P870+ signal with that from the ubisemiquinone. Addition of ferricyanide to chromatophores induces in the dark a new ESR signal characterized by a linewidth of 4.5 Oe which presumably arises from the antenna bacteriochlorophyll aggregates, because this signal is absent in the reaction center preparations.

Translated title of the contributionFree radical centers in the chromatophores and preparations of Rhodospirillum rubrum reaction centers
Original languageRussian
Pages (from-to)761-762
Number of pages2
JournalBiofizika
Volume24
Issue number4
Publication statusPublished - Jul 1 1979
Externally publishedYes

ASJC Scopus subject areas

  • Medicine(all)

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