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Proceedings Paper

PhotoGate microscopy: tracking single molecules in a cytoplasm (Conference Presentation)
Author(s): Ahmet Yildiz
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Paper Abstract

Tracking single molecules inside cells reveals the dynamics of biological processes, including receptor trafficking, signaling and cargo transport. However, individual molecules often cannot be resolved inside cells due to their high density in the cellular environment. We developed a photobleaching gate assay, which controls the number of fluorescent particles in a region of interest by repeatedly photobleaching its boundary. Using this method, we tracked single particles at surface densities two orders of magnitude higher than the single-molecule detection limit. We observed ligand-induced dimerization of epidermal growth factor receptors (EGFR) on a live cell membrane. In addition, we tracked individual intraflagellar transport (IFT) trains along the length of a cilium and observed their remodeling at the ciliary tip.

Paper Details

Date Published: 27 April 2016
PDF: 1 pages
Proc. SPIE 9714, Single Molecule Spectroscopy and Superresolution Imaging IX, 971409 (27 April 2016); doi: 10.1117/12.2209394
Show Author Affiliations
Ahmet Yildiz, Univ. of California, Berkeley (United States)

Published in SPIE Proceedings Vol. 9714:
Single Molecule Spectroscopy and Superresolution Imaging IX
Jörg Enderlein; Ingo Gregor; Zygmunt Karol Gryczynski; Rainer Erdmann; Felix Koberling, Editor(s)

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