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Reference: Hore, PJ, Kattnig, DR, Solov'yov, IA et al., (2016). Electron spin relaxation can enhance the performance of a cryptochrome-based magnetic compass sensor. New Journal of Physics.Citable link to this page:

 

Electron spin relaxation can enhance the performance of a cryptochrome-based magnetic compass sensor

Abstract: The radical pair model of the avian magnetoreceptor relies on long‐lived electron spin coherence. Dephasing, resulting from interactions of the spins with their fluctuating environment, is generally assumed to degrade the sensitivity of this compass to the direction of the Earth's magnetic field. Here we argue that certain spin relaxation mechanisms can enhance its performance. We focus on the flavin‐tryptophan radical pair in cryptochrome, currently the only candidate magnetoreceptor molecule. Correlation functions for fluctuations in the distance between the two radicals in Arabidopsis thaliana cryptochrome 1 were obtained from molecular dynamics simulations and used to calculate the spin relaxation caused by modulation of the exchange and dipolar interactions. We find that intermediate spin relaxation rates afford substantial enhancements in the sensitivity of the reaction yields to an Earth‐strength magnetic field. Supported by calculations using toy radical pair models, we argue that these enhancements could be consistent with the molecular dynamics and magnetic interactions in avian cryptochromes.

Peer Review status:Peer reviewedPublication status:PublishedVersion:Accepted manuscript Funder: Lundbeck Foundation   Funder: Russian Science Foundation   Notes:© 2016 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

Bibliographic Details

Publisher: Institute of Physics

Publisher Website: http://www.iop.org/

Publisher: IOP Publishing: Open Access Journals

Journal: New Journal of Physicssee more from them

Publication Website: http://iopscience.iop.org/journal/1367-2630

Issue Date: 2016-05Identifiers

Urn: uuid:3dd55ea5-5145-465a-b437-ce91ae07953f

Source identifier: 623173

Doi: https://doi.org/10.1088/1367-2630/18/6/063007

Issn: 1367-2630 Item Description

Type: Journal article;

Version: Accepted manuscript Tiny URL: pubs:623173

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Author: Hore, PJ - institutionUniversity of Oxford Oxford, MPLS, Chemistry, Physical and Theoretical Chem grantNumber340451 grantNumberFA

Source: https://ora.ox.ac.uk/objects/uuid:3dd55ea5-5145-465a-b437-ce91ae07953f



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