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    Time-resolved optical absorption microspectroscopy of magnetic field sensitive flavin photochemistry

    266213.pdf (2.401Mb)
    Access Status
    Open access
    Authors
    Antill, L.
    Beardmore, Josh
    Woodward, J.
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Antill, L. and Beardmore, J. and Woodward, J. 2018. Time-resolved optical absorption microspectroscopy of magnetic field sensitive flavin photochemistry. Review of Scientific Instruments. 89 (2): Article ID 023707.
    Source Title
    Review of Scientific Instruments
    DOI
    10.1063/1.5011693
    ISSN
    0034-6748
    School
    School of Earth and Planetary Sciences (EPS)
    Remarks

    This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Review of Scientific Instruments as cited above, and may be found at https://doi.org/10.1063/1.5011693.

    URI
    http://hdl.handle.net/20.500.11937/68245
    Collection
    • Curtin Research Publications
    Abstract

    The photochemical reactions of blue-light receptor proteins have received much attention due to their very important biological functions. In addition, there is also growing evidence that the one particular class of such proteins, the cryptochromes, may be associated with not only a biological photo-response but also a magneto-response, which may be responsible for the mechanism by which many animals can respond to the weak geomagnetic field. Therefore, there is an important scientific question over whether it is possible to directly observe such photochemical processes, and indeed the effects of weak magnetic fields thereon, taking place both in purified protein samples in vitro and in actual biochemical cells and tissues. For the former samples, the key lies in being able to make sensitive spectroscopic measurements on very small volumes of samples at potentially low protein concentrations, while the latter requires, in addition, spatially resolved measurements on length scales smaller than typical cellular components, i.e., sub-micron resolution. In this work, we discuss a two- and three-color confocal pump-probe microscopic approach to this question which satisfies these requirements and is thus useful for experimental measurements in both cases.

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