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Updated: Jun 27, 2026

High-throughput Confocal Imaging of Quantum Dot-Conjugated SARS-CoV-2 Spike Trimers to Track Binding and Endocytosis in HEK293T Cells
Published on: April 21, 2022
High affinity scFv-hapten pair as a tool for quantum dot labeling and tracking of single proteins in live cells
Gopal Iyer1, Xavier Michalet, Yun-Pei Chang
1Department of Chemistry & Biochemistry, David Geffen School of Medicine, UCLA, Los Angeles, California 90024, USA. gopal@chem.ucla.edu
Abstract:
We describe a general approach to label cell surface proteins using quantum dots (QD) for single-molecule tracking. QDs coated with small-hapten modified peptides are targeted to cell surface fusion proteins containing the corresponding single-chain fragment antibody (scFv). The approach is illustrated with the small hapten fluorescein (FL) and a high-affinity anti-FL scFv fused to two different proteins in yeast and murine neuronal cell line N2a.
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