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Integrated multi-wavelength microscope combining TIRFM and IRM modalities for imaging cellulases and other processive enzymes

Journal Article · · Biomedical Optics Express
DOI:https://doi.org/10.1364/BOE.423798· OSTI ID:1842364

We describe a multimodal microscope for visualizing processive enzymes moving on immobilized substrates. The instrument combines interference reflection microscopy (IRM) with multi-wavelength total internal reflectance fluorescence microscopy (TIRFM). The microscope can localize quantum dots with a precision of 2.8 nm at 100 frames/s, and was used to image the dynamics of the cellulase, Cel7a interacting with surface-immobilized cellulose. The instrument, which was built with off-the-shelf components and is controlled by custom software, is suitable for tracking other degradative enzymes such as collagenases, as well as motor proteins moving along immobilized tracks.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0019065
OSTI ID:
1842364
Alternate ID(s):
OSTI ID: 1852799
OSTI ID: 2229919
Journal Information:
Biomedical Optics Express, Journal Name: Biomedical Optics Express Journal Issue: 6 Vol. 12; ISSN 2156-7085
Publisher:
Optical Society of AmericaCopyright Statement
Country of Publication:
United States
Language:
English

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