DBCO-mPEG, MW 20,000

DBCO-mPEG, MW 20,000 is a dibenzocyclooctyne (DBCO) functionalized methoxy-terminated polyethylene glycol (mPEG) conjugate designed for strain-promoted azide–alkyne cycloaddition (SPAAC) in click chemistry workflows. The polymeric scaffold provides excellent aqueous solubility and steric shielding, while the DBCO handle enables rapid, catalyst-free conjugation to azide-bearing biomolecules, surfaces, and materials. This reagent is widely used to install PEG layers, create stealth-like bioconjugates, and build modular polymer conjugates for research-grade labeling, material functionalization, and imaging reagent development.

1. PEGylated Bioconjugates

DBCO-mPEG, MW 20,000 is commonly used to generate PEGylated bioconjugates by reacting its DBCO group with azide-functional targets such as peptides, proteins, antibodies fragments, or nucleic-acid binders. In typical labeling and conjugation pipelines, the high molecular weight PEG chain improves colloidal stability and reduces non-specific interactions, making the resulting conjugates better suited for downstream handling in aqueous buffers and for incorporation into multi-component assemblies. Researchers also use this reagent to tune hydrodynamic size and surface properties when comparing conjugate formats for assay development, affinity capture, or platform screening.

2. Surface and Material Functionalization

DBCO-mPEG, MW 20,000 is frequently applied to functionalize polymeric and inorganic surfaces that have been modified with azide groups, enabling stable PEG brush formation via SPAAC. This use case is prevalent in biomaterials science and materials engineering, where PEGylated surfaces help control protein adsorption, improve wettability, and reduce aggregation during experimental workflows. By attaching a defined PEG chain length, teams can create reproducible antifouling coatings for biosensor components, microfluidic device surfaces, and experimental substrates used in molecular binding studies.

3. Modular Polymer Conjugation

DBCO-mPEG, MW 20,000 serves as a versatile building block for modular polymer conjugation strategies in which azide-containing polymers, nanoparticles, or scaffold systems are assembled through SPAAC. The reagent’s polymer nature supports construction of PEG-rich architectures that are compatible with complex formulation steps, including mixing with other functional polymers, incorporation into composite materials, or stepwise assembly of multi-ligand constructs. This approach is widely adopted in chemical biology and materials research to produce standardized conjugate libraries where PEG length and attachment density are key variables.

4. Imaging and Labeling Platforms

DBCO-mPEG, MW 20,000 is used to prepare labeled imaging and detection platforms by conjugating PEG chains to azide-bearing tags that carry fluorescent dyes, affinity handles, or imaging moieties. In molecular imaging reagent development, PEGylation is often leveraged to improve dispersion, minimize surface-driven background, and support consistent probe behavior across labeling and wash steps. The DBCO handle enables straightforward coupling into existing azide-functional probe designs, allowing researchers to integrate PEG tuning into probe optimization workflows without introducing additional coupling catalysts that may interfere with sensitive components.