Absorption spectra of mixed monomolecular films of chlorophyll and photosynthetic electron carriers at a gas-water interface

Hirsch, Rhoda Elison; Brody, Seymour Steven

doi:10.1016/0003-9861(80)90308-2

Cited by 6 publications

(1 citation statement)

References 21 publications

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“…Farver et al, 1985;Adman, 1985;Bottin and Mathis, 1985;Matsura and Itoh, 1985;Takabe et al, 1984;Tollin et al, 1986) have shown that electrostatic interactions involving negatively-charged sites participate in the electron transfer mechanism both in v i m and in vivo. Hirsch and Brody (1983) have prepared a 1 : 1 chlorophyll-plastocyanin complex in mixed monomolecular films and observed light-driven electron transfer from chlorophyll to oxidized plastocyanin. Davis et al (1985) have suggested that chlorophyll is bound very close to the copper atom of plastocyanin in a 1 : 1 chlorophyll-plastocyanin complex on the basis of the efficient quenching of chlorophyll fluorescence.…”

Section: Introductionmentioning

confidence: 99%

Spinach Plastocyanin as an Electron Acceptor From Membrane‐bound Chlorophyll Triplet State in Positively Charged Lipid Bilayer Vesicles*

Senthilathipan

Tollin

1987

Photochem & Photobiology

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Spinach plastocyanin is bound to egg phosphatidylcholine vesicles containing 5–25 mole percent dioctadecyldimethylammonium chloride (DODAC) via electrostatic interactions in a 50 mM betaine medium (pH=6.5). This was demonstrated by both gel filtration experiments and kinetic results using laser flash photolysis. Under those conditions, oxidized plastocyanin can function as a direct electron acceptor from membrane‐bound triplet chlorophyll to produce chlorophyll cation radical and reduced plastocyanin. The fraction of chlorophyll triplet which is quenched by oxidized plastocyanin increases, and the yield of electron transfer products also increases, with an increase in the magnitude of the positive charge on the vesicles. Product decay and rise halftimes decrease with an increase in the mole percent of DODAC+ incorporated into egg phosphatidylcholine vesicles. However, both of these halftimes are independent of oxidized plastocyanin concentration. Even though ∼50% of the Chi triplets were quenched, no electron transfer product formation was observed in 5 mM phosphate buffer (pH=7.0). Under similar conditions in betaine, approximately 13% of the Chi triplets could be converted into products.

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Section: Introductionmentioning

confidence: 99%

Spinach Plastocyanin as an Electron Acceptor From Membrane‐bound Chlorophyll Triplet State in Positively Charged Lipid Bilayer Vesicles*

Senthilathipan

Tollin

1987

Photochem & Photobiology

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A tribute to Seymour Steven Brody: in memoriam (November 29, 1927 to May 25, 2010)

Hirsch

Rich

2010

Photosynth Res

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We honor Steve Brody, a dear friend and a mentor on what would have been his 83rd birthday (November 29, 2010). Steve was a pioneer of chlorophyll structure and function, an outstanding biophysicist, an innovator, an artist and an adventurer, a true renaissance man. We present here first his first-of-a-kind contributions on the primary processes of photosynthesis at the University of Illinois at Urbana-Champaign, and then review his research on the interactions of chlorophyll monolayers and various photosynthetic electron donors and acceptors in artificial membrane systems at New York University. We highlight significant research contributions of interest to the reader and conclude with biographical notes.

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A non-fluorescent complex of chlorophyll a with plastocyanin

Davis¹,

Knotts²,

Seely³

et al. 1985

Biochemical and Biophysical Research Communications

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Absorption spectra of mixed monomolecular films of chlorophyll and photosynthetic electron carriers at a gas-water interface

Cited by 6 publications

References 21 publications

Spinach Plastocyanin as an Electron Acceptor From Membrane‐bound Chlorophyll Triplet State in Positively Charged Lipid Bilayer Vesicles*

Spinach Plastocyanin as an Electron Acceptor From Membrane‐bound Chlorophyll Triplet State in Positively Charged Lipid Bilayer Vesicles*

A tribute to Seymour Steven Brody: in memoriam (November 29, 1927 to May 25, 2010)

A non-fluorescent complex of chlorophyll a with plastocyanin

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