Checkout View Cart Items
Subscribe to BioProbes and ProbesOnline
Cell & Tissue Analysis

Labeling Chemistry

Labeling Chemistry Invitrogen's Molecular Probes® fluorescence-based reagents and kits provide enabling technologies to efficiently conjugate biomolecules of interest with our proprietary fluorescent dyes.  Whether you want amine reactive, thiol reactive or other functional group reactivity, Molecular Probes® labeling chemistries provide you with the tools you  need.  These reagents include the Alexa Fluor® dyes—a series of superior fluorescent dyes that spans the near-UV, visible, and near-IR spectra— which represent a major breakthrough in the development of fluorescent labeling reagents. These dyes, without exception, produce the best and brightest conjugates we have ever tested.

Labeling Amines

Labeling chemistries using amine-reactive dyes and molecules allow you to efficiently prepare fluorescent bioconjugates for immunochemistry, cell tracing, FISH, and fluorescent analog cytochemistry.

Labeling Thiols

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

Click Chemistries

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


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.

Other Reactive Chemistries

A range of useful and specific fluorescent and nonfluorescent reactive probes.


Peptide Synthesis

Reagents for automated synthesis of peptides site-specifically labeled with fluorophores, chromophores, or haptens.

Bifunctional Crosslinking

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


Protein, Peptide & Antibody Labeling

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


Nucleic Acid Labeling

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


Labeling QC & Calibration

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