Evidence map›Paper›PMID 26857477›Full record

ArticleScientific reports2016

Dark States in the Light-Harvesting complex 2 Revealed by Two-dimensional Electronic Spectroscopy.

Marco Ferretti, Ruud Hendrikx, Elisabet Romero, June Southall, Richard J Cogdell, Vladimir I Novoderezhkin, Gregory D Scholes, Rienk van Grondelle

Abstract read
In one paragraph

Article in Scientific reports, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

19 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Marco FerrettiDepartment of Physics and Astronomy, VU University, 1081 HV Amsterdam, The Netherlands.
Ruud HendrikxDepartment of Physics and Astronomy, VU University, 1081 HV Amsterdam, The Netherlands.
Elisabet RomeroDepartment of Physics and Astronomy, VU University, 1081 HV Amsterdam, The Netherlands.
June SouthallDivision of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, UK.
Richard J CogdellDivision of Biochemistry and Molecular Biology, Institute of Biomedical and Life Sciences, University of Glasgow, Glasgow G12 8QQ, UK.
Vladimir I NovoderezhkinA. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, 119991 Moscow, Russia.
Gregory D ScholesDepartment of Chemistry, Princeton University, Washington Rd, Princeton NJ 08544, USA.
Rienk van GrondelleDepartment of Physics and Astronomy, VU University, 1081 HV Amsterdam, The Netherlands.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Energy transfer and trapping in the light harvesting antennae of purple photosynthetic bacteria is an ultrafast process, which occurs with a quantum efficiency close to unity. However the mechanisms behind this process have not yet been fully understood. Recently it was proposed that low-lying energy dark states, such as charge transfer states and polaron pairs, play an important role in the dynamics and directionality of energy transfer. However, it is difficult to directly detect those states because of their small transition dipole moment and overlap with the B850/B870 exciton bands. Here we present a new experimental approach, which combines the selectivity of two-dimensional electronic spectroscopy with the availability of genetically modified light harvesting complexes, to reveal the presence of those dark states in both the genetically modified and the wild-type light harvesting 2 complexes of Rhodopseudomonas palustris. We suggest that Nature has used the unavoidable charge transfer processes that occur when LH pigments are concentrated to enhance and direct the flow of energy.

Indexed as

Bacterial ProteinsDarknessLight-Harvesting Protein ComplexesMicroscopy, Energy-Filtering Transmission ElectronRhodopseudomonasBacterial ProteinsLight-Harvesting Protein Complexes

Identifiers

PMID26857477
PMCPMC4746630

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.