Publications associated with Biological Physics


Alternating Laser Excitation for Solution-Based Single-Molecule FRET.

Cold Spring Harbor protocols 2015 (2015) 979-987

A Kapanidis, D Majumdar, M Heilemann, E Nir, S Weiss

Single-molecule fluorescence resonance energy transfer (smFRET) has been widely applied to the study of fluorescently labeled biomolecules on surfaces and in solution. Sorting single molecules based on fluorescent dye stoichiometry provides one with further layers of information and also enables "filtering" of unwanted molecules from the analysis. We accomplish this sorting by using alternating laser excitation (ALEX) in combination with smFRET measurements; here we describe the implementation of these methodologies for the study of biomolecules in solution.


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