Method to identify and minimize artifacts induced by fluorescent impurities in single-molecule localization...

Area of Science:

• Optics and Photonics
• Biophysics
• Analytical Chemistry

Background:

• Fluorescent impurities are a significant challenge in single-molecule imaging, leading to misidentification and increased localization error.
• Existing methods struggle to differentiate between target molecules and background fluorescence from sample preparation.

Purpose of the Study:

• To develop and validate a method for separating fluorescent impurities from target molecules in single-molecule imaging.
• To leverage spectroscopic data for enhanced molecular localization and identification.

Main Methods:

• Utilizing spectroscopic single-molecule localization microscopy (sSMLM) to record emission spectra of individual molecules.
• Quantifying spatial and spectral features of fluorescent impurities and target molecules.
• Developing a computational approach to differentiate and separate impurity signals.

Main Results:

• Successfully characterized the spectral and spatial signatures of common fluorescent impurities.
• Demonstrated effective separation of fluorescent impurities from target molecules using sSMLM data.
• Achieved reduced localization uncertainty and improved sample fidelity.

Conclusions:

• Spectroscopic analysis provides a powerful tool for identifying and removing fluorescent impurities in single-molecule imaging.
• The developed method significantly enhances the reliability and accuracy of single-molecule localization microscopy.
• This approach paves the way for more precise investigations in fields relying on single-molecule analysis.