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Related Concept Videos

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The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains
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Updated: Nov 5, 2025

Antibody Labeling with Fluorescent Dyes Using Magnetic Protein A and Protein G Beads
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Protocol for Creating Antibodies with Complex Fluorescence Spectra.

Madeline E McCarthy1, Caitlin M Anglin1, Heather A Peer1

  • 1Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, South Carolina 29634, United States.

Bioconjugate Chemistry
|May 19, 2021
PubMed
Summary
This summary is machine-generated.

We developed a novel method for labeling antibodies with unique spectral signatures using combinations of fluorescent probes. This technique enhances multiplexing capabilities for biomedical research and diagnostics.

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Area of Science:

  • Biotechnology
  • Immunology
  • Spectroscopy

Background:

  • Fluorescent antibodies are crucial in biomedical research.
  • Spectral overlap between fluorophores limits multiplexing capabilities.
  • Existing methods for fluorescence multiplexing are challenging.

Purpose of the Study:

  • To develop a method for labeling antibodies with MuSIC (Multiplexing using Spectral Imaging and Combinatorics) probes.
  • To enable enhanced multiplexing for biomedical applications.
  • To overcome spectral overlap limitations in fluorescence imaging.

Main Methods:

  • Antibodies were conjugated with a DBCO-Peg5-NHS ester linker and a DNA docking strand.
  • MuSIC-compatible fluorescent oligonucleotides were hybridized to the docking strand.
  • Labeled antibodies were validated using spin-column purification and absorbance measurements.
  • Protein A beads were incubated with labeled antibodies to create single-, double-, and triple-positive beads.
  • Spectral flow cytometry was used to analyze bead populations.

Main Results:

  • A robust method for labeling antibodies with MuSIC probes was successfully developed and validated.
  • Single, double, and triple-positive beads were created, mimicking single-cell analysis.
  • Spectral flow cytometry demonstrated unique distinguishability of each MuSIC probe.
  • Accurate inference of staining patterns in mixed bead populations was achieved.

Conclusions:

  • The developed MuSIC probe labeling method significantly enhances antibody multiplexing capabilities.
  • This approach offers a versatile tool for cell-type profiling and tissue heterogeneity studies.
  • The method holds potential for broad applications in clinical research, biomedical studies, and drug discovery.