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Cell & Tissue Analysis

Labeling Chemistry

Labeling Chemistry Fluorescent labeling of biomolecules enables researchers to detect specific components of complex biological assemblies with exquisite sensitivity in applications ranging from imaging and flow cytometry, to Western blots. Invitrogen offers a full spectrum of Molecular Probes® labeling chemistries for labeling antibodies, proteins, peptides, ligands, synthetic oligonucleotides and other biomolecules for use with immunochemistry, fluorescence in situ hybridization (FISH), cell tracing, receptor labeling, and cytochemistry applications as well as probing biological structure, function and interactions. Also available are tools for conjugation of biotin and other haptens to biomolecules.

Whether you want amine reactive, thiol reactive or other functional group reactivity, Invitrogen provides you with the tools you need including the bright and photostable Alexa Fluor® dyes and Qdot® nanocrystals.

Find Your Labeling Product

Reactive Chemistry Reagents For:
Kits and Assays For:

Labeling Amines

Labeling Amines

Amine-reactive dyes are widely used to modify proteins, peptides, ligands, synthetic oligonucleotides and other biomolecules. They are most often used to prepare bioconjugates for immunochemistry, fluorescence in situ hybridization (FISH), cell tracing, receptor labeling and cytochemistry.


Labeling Thiols

Labeling Thiols

Efficiently prepare fluorescent proteins, peptides, and sulfhydryl-modified oligos for analyzing protein structure and function.


Click Chemistries

Click Chemistries

Click-iT™ chemistry—a powerful method for joining biomolecules quickly and specifically.


Labeling Carboxylic Acids, Aldehydes & Ketones

Labeling Carboxylic Acids, Aldehydes & Ketones

Efficiently label aldehydes and ketones in low molecular weight structures such as drugs, steroid hormones, reducing sugars, and metabolic intermediates.

Bifunctional Crosslinking

Bifunctional Crosslinking

Bifunctional cross-linking reagents to covalently link two target groups.





Labeling Proteins, Peptides & Antibodies

Labeling Proteins, Peptides & Antibodies

A comprehensive selection of innovative and time-tested protein and antibody labeling kits.


Labeling Nucleic Acids

Labeling Nucleic Acids

Directly label DNA, RNA, and oligonucleotides with intensely fluorescent Alexa Fluor® dyes.


Labeling QC & Calibration

Labeling QC & Calibration

Optimize results with reference standards to calibrate instruments, compare results, determine degree of labeling, or generate standard curves.
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