DBCO-C-PEG1 | CAS 2377004-09-4

DBCO-C-PEG1 is a cyclooctyne (DBCO)-functionalized, short PEG linker reagent designed for strain-promoted azide–alkyne cycloaddition (SPAAC) click chemistry. Its PEG spacer improves aqueous handling and reduces nonspecific interactions in bioconjugation workflows, while the DBCO handle enables rapid, catalyst-free coupling to azide-bearing targets. This reagent is commonly used to attach PEGylated moieties, biomolecule conjugates, or imaging/assay components to azide-functional surfaces and probes.

1. Protein And Peptide Labeling

DBCO-C-PEG1 is widely used to install a PEG spacer onto azide-presenting proteins, peptides, and protein fragments during labeling and assay development. Researchers often choose this reagent when they want SPAAC compatibility under mild conditions, with improved solubility and reduced aggregation compared with non-spaced DBCO derivatives. The PEG1 linker supports more consistent conjugate behavior in binding assays, pull-down workflows, and analytical characterization where surface accessibility and steric environment can strongly influence performance.

2. Surface And Material Functionalization

DBCO-C-PEG1 is employed to functionalize azide-functionalized biomaterials, polymer surfaces, and microfabricated platforms through SPAAC coupling. In materials science and chemical biology, the short PEG spacer helps moderate local hydrophilicity and spacing of the attached ligands, which is important for reproducible surface chemistry and for minimizing nonspecific adsorption in complex media. This makes the reagent a practical choice for building clickable coatings, immobilized probe layers, and reagent-ready surfaces used in downstream screening, imaging, and analytical workflows.

3. Molecular Imaging Probe Conjugation

DBCO-C-PEG1 is commonly incorporated into workflows that generate azide-reactive imaging probes and then couple them to DBCO-bearing reporter constructs via SPAAC. The PEG1 spacer is particularly useful when attaching bulky imaging tags or when the probe needs improved aqueous compatibility and reduced background from nonspecific interactions. Laboratories use this reagent to assemble modular imaging reagents for fluorescence-based detection, enrichment strategies, and analytical readouts where controlled linker length and solvation effects matter.

4. Diagnostic Reagent And Assay Buildouts

DBCO-C-PEG1 supports the assembly of diagnostic and research assay reagents by enabling efficient coupling between DBCO-bearing components and azide-functional assay partners. The reagent’s PEG spacer is frequently selected to help maintain reagent stability and consistent presentation of the conjugated functionality, which can influence assay reproducibility in wash-intensive formats and multiplex workflows. It is also used to prepare clickable reagent conjugates for bead-based assays, immobilized detection chemistries, and standardized reagent panels that rely on robust SPAAC coupling.