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Quantum yield and image contrast of bacteriochlorophyll monolayers in photoelectron microscopy.

作者信息

Barnes R B, Amend J, Sistrom W R, Griffith O H

出版信息

Biophys J. 1978 Mar;21(3):195-202. doi: 10.1016/S0006-3495(78)85519-2.

DOI:10.1016/S0006-3495(78)85519-2
PMID:630040
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC1473685/
Abstract

The photoelectron quantum yield spectrum of bacteriochlorophyll aGg (Bchl a ) from Rhodospirillum rubrum was determined in order to evaluate the possibility of mapping photoreceptor distribution and organization in bacterial chromatophores. The quantum yield is on the order of 1 X 10(-3) electrons/incident photon at 180 nm and decreases to 2.5 X 10(-5) electrons/incident photon at 230 nm. Photoelectron micrographs confirm the high contrast predicted between monolayers of Bchl a against a lipid background (calcium arachidate). A significant contrast difference is found between the two monolayer orientations, demonstrating that photoelectron microscopy is a sensitive detector of asymmetry in Bch1 a monolayers.

摘要
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8e31/1473685/26057b10fa00/biophysj00749-0022-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8e31/1473685/26057b10fa00/biophysj00749-0022-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8e31/1473685/26057b10fa00/biophysj00749-0022-a.jpg

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本文引用的文献

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Some mutational changes in the photosynthetic pigment system of Rhodopseudomonas spheroides.球形红假单胞菌光合色素系统中的一些突变变化。
J Gen Microbiol. 1956 Jul;14(3):698-715. doi: 10.1099/00221287-14-3-698.
2
The spectrum of bacteriochlorophyll in vivo: observations on mutants of Rhodopseudomonas spheroides unable to grow photosynthetically.体内细菌叶绿素的光谱：对不能进行光合生长的球形红假单胞菌突变体的观察
Photochem Photobiol. 1966 Nov-Dec;5(11):845-56. doi: 10.1111/j.1751-1097.1966.tb05931.x.
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Complete fractionation of bacteriochlorophyll and its degradation products.
Bibl Laeger. 1966 Mar 14;112(3):392-402. doi: 10.1016/0926-6585(66)90243-3.
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Photoelectron quantum yields of the amino acids.氨基酸的光电子量子产率。
Biophys J. 1974 Jun;14(6):467-72. doi: 10.1016/S0006-3495(74)85927-8.
5
Esterifying alcohols in the chlorophylls of purple photosynthetic bacteria. A new chlorophyll, bacteriochlorophyll (gg), all-trans-geranylgeranyl bacteriochlorophyllide a.
J Am Chem Soc. 1972 Nov 1;94(22):7938-9. doi: 10.1021/ja00777a054.
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Photoelectron quantum yields of hemin, hemoglobin, and apohemoglobin. Possible applications to photoelectron microscopy of heme proteins in biological membranes.血红素、血红蛋白和脱辅基血红蛋白的光电子量子产率。对生物膜中血红素蛋白进行光电子显微镜观察的可能应用。
Biophys J. 1974 Dec;14(12):933-9. doi: 10.1016/S0006-3495(74)85960-6.
7
Relations between pigments and proteins in the photosynthetic membranes of Rhodopseudomonas spheroides.球形红假单胞菌光合膜中色素与蛋白质的关系。
Biochim Biophys Acta. 1972 Dec 14;283(3):492-504. doi: 10.1016/0005-2728(72)90265-4.
8
Photoelectron quantum yields and photoelectron microscopy of chlorophyll and chlorophyllin.
Photochem Photobiol. 1975 Dec;22(6):265-8. doi: 10.1111/j.1751-1097.1975.tb06747.x.