Protein Labeling & Crosslinking

We offer a wide range of products for the  crosslinking, biotinylation, pegylation and fluorescent labeling of proteins, antibodies and peptides. These bioconjugation reagents are commonly used to studying the structure and interaction of proteins, build immunoassays, increase protein solubility or attach molecules to surfaces. Use our crosslinking or biotinylation reagent selection tool to find the optimal reagent for your application, or access our helpful technical handbook to help improve your bioconjugation results. To address the need for rapid removal of small molecules from protein sample preparations, we have expanded our offering with the Zeba Dye and Biotin Removal Spin Columns and 96-Well Filter Plates.

Featured protein labeling & crosslinking categories

Convenient labeling kits and reactive dyes for the direct attachment of Invitrogen Alexa Fluor and other dyes for 10 μg to 1 mg of proteins or antibodies.

Reagents containing reactive ends to specific functional groups on proteins and antibodies, enabling the covalent joining or two or more biomolecules for the study of protein function and interaction.

Reagents and kits to chemically tag and label antibodies, proteins, and peptides with biotin or desthiobiotin at particular amino acid functional groups to create labeled antibody or other probes for streptavidin affinity binding, purification, and detection.

Reagents to modify proteins by crosslinking, fragmenting, cleaving, denaturing, reducing disulfides, or attaching functional groups to study protein function and interactions.

Specialty resin for rapid removal of non-conjugated fluorescent dyes, biotin, unused reducing agents, and crosslinkers with exceptional protein recovery.

Bulk or custom product request

Need larger quantities of our protein labeling, crosslinking or modification reagents? We offer bulk and custom fill sizes.

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For Research Use Only. Not for use in diagnostic procedures.