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Imaging Protein-protein Interactions in vivo
Published on: October 10, 2010
Imaging protein interactions by FRET microscopy: labeling proteins with fluorescent dyes
CSH Protocols
|April 10, 2012
Summary
This protocol details a method for labeling proteins using sulfoindocyanine (Cy) dyes. These dyes covalently attach to protein amino groups, enabling versatile bio-labeling applications.
Area of Science:
- Biochemistry
- Molecular Biology
- Protein Chemistry
Background:
- Protein labeling is crucial for various biological assays and imaging techniques.
- Existing methods may have limitations in efficiency or specificity.
- Sulfoindocyanine (Cy) dyes offer desirable fluorescent properties for biological labeling.
Purpose of the Study:
- To provide a robust protocol for labeling proteins with Cy dyes.
- To enable efficient and specific covalent attachment of Cy dyes to proteins.
- To facilitate the application of labeled proteins in research.
Main Methods:
- Utilizing succinimide esters of sulfoindocyanine (Cy) dyes.
- Covalent conjugation to free amino groups on proteins.
- Targeting both N-terminal and lysine side chain amino groups.
Main Results:
- Successful labeling of proteins including antibodies and recombinant proteins.
- Demonstration of covalent bond formation between Cy dyes and protein amino groups.
- Protocol amenable to various protein types.
Conclusions:
- The described method offers an effective way to label proteins with Cy dyes.
- This protocol supports the development of novel protein-based research tools.
- The covalent labeling strategy ensures stable dye attachment for reliable results.
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