- Simple—ready to use in 2 hours, requiring approximately 30 minutes actual hands-on time
- Reliable—protein conjugates with stable attachment of fluorescent labels for subsequent use in fluorescence-based imaging or flow cytometry
- Convenient—easiest method to label larger amounts of IgG antibody
|Alexa Fluor® 350||
|Alexa Fluor® 488||
|Alexa Fluor® 532||
|Alexa Fluor® 546||
|Alexa Fluor® 555||
|Alexa Fluor® 568||
|Alexa Fluor® 594||
|Alexa Fluor® 633||
|Alexa Fluor® 647||
|Alexa Fluor® 660||
|Alexa Fluor® 680||
|Oregon Green® 488||
|Pacific Blue™ dye||
|Pacific Orange™ dye||
|Texas Red® dye||
|Ex/Em = Fluorescence excitation and emission maxima, in nm.
Find more information about Alexa Fluor® dyes and other fluorophores in the Fluorophore Selection Guide
How Protein Labeling Kits work
The Protein Labeling Kits utilize an amine-reactive fluorophore or hapten to covalently attach the label to the IgG antibody. Once formed, the covalent bond between the label and the protein is extremely stable—you are using the same chemistry we use to prepare our own primary and secondary conjugates.
Simply add ~1 mg of purified IgG (in ~500 μL and free of amine-containing buffers such as Tris) to one of the vials containing a premeasured quantity of amine-reactive dye and a magnetic stir bar. Purification is accomplished on a gravity-feed size exclusion column supplied with the kit (Figure 1). The entire labeling and purification procedure can be completed in as little as 2 hours; everything needed to perform three conjugations is provided.
Figure 1. Molecular Probes® Protein Labeling Kits are the simplest way
to label 1 mg of IgG antibodies.
Need to label other antibody amounts?
|IgG amount||Attachment of label||Products|
|<1–20 µg||Site-specific||Zenon® Antibody Labeling Kits|
|<100 µg||Site-specific||SiteClick™ Antibody Labeling Kits|
|10–20 µg||Conventional covalent||APEX® Antibody Labeling Kits|
|20–100 µg||Conventional covalent||Microscale Protein Labeling Kits|
|100 µg||Conventional covalent||Antibody Labeling Kits|
|1 mg||Conventional covalent||Protein Labeling Kits|
|0.5–3 mg||Conventional covalent||SAIVI™ Rapid Antibody Labeling Kits|
BioProbes Journal article
Molecular Probes Handbook
For Research Use Only. Not for use in diagnostic procedures.