Bioconjugation Reagents

SoluLINK® bioconjugation technology has been engineered to allow rapid and quantifiable conjugation of all classes of biomolecules. This technology is based on the reaction of HyNic with 4FB to form a stable bis-arylhydrazone bond. Unlike other conjugation chemistries, these linkers are chromophoric, meaning that they absorb light and can therefore be easily quantified with a simple spectrophotometer reading. The bis-arylhydrazone chromophore is crucial for measuring the number of linkers incorporated on each biomolecule and the degree of conjugation between two biomolecules. Quantifiable linkers allow unparalleled reproducibility of bioconjugate preparation from batch-to-batch.

SoluLINK conjugation kits contain everything needed to produce and purify high quality conjugates. Purification to remove unincorporated labels is crucial as it results in reduced non-specific binding, higher sensitivity, and higher signal-to-noise in your assay. Despite their apparent simplicity, competing “mix and use” conjugation products simply do not work well because of inefficient conjugation chemistry and lack of a purification step. This leaves both unconjugated biomolecule (e.g., antibody) and excess label (e.g., fluor, oligo, and enzyme) in the reaction mixture.

ChromaLINK® Biotin and Digoxigenin are the only reagents of their type which can be directly quantified upon linking to biomolecules. These reagents contain the same bis-arylhydrazone bond that is central to SoluLINK bioconjugation technology. Biotinylated biomolecules are efficiently immobilized onto streptavidin coated surfaces, such as magnetic beads and agarose. NanoLINK® and MagnaLINK® streptavidin magnetic beads possess up to 15-times greater biotin binding capacity than other commercially available products. Streptavidin Agarose Ultra Performance™ also has the highest biotin binding capacity of any agarose bead on the market.

Conjugation linkers and accessories are available as flexible stand-alone products for scale-up work. These linkers are ideal for protein crosslinking, protein labeling, chemical crosslinking, protein crosslinking, and antibody conjugation. All SoluLINK products are manufactured under the TriLink ISO 9001:2015 quality system to ensure a consistent supply of high-quality product.


Explore Bioconjugation Reagents

Use our conjugation kits and antibody labeling kits to link antibodies and other proteins to oligonucleotides, biotin, digoxigenin, peptides, fluorophores, and enzymes. Based on SoluLINK bioconjugation technology, the All-in-One™ and One-Shot™ conjugation kits include everything needed to produce and purify high-quality conjugates.
When you need a conjugate with high sensitivity, excellent reproducibility, and low non-specific binding, SoluLINK kits deliver and help you move your research forward.

  • Easy to use — regardless of your level of experience with conjugation, our detailed step-by-step protocols clearly explain each part of the modification and conjugation process
  • Quantifiable — SoluLINK linkers are chromogenic, so you can quantify the molar substitution ratios of HyNic and 4FB on your biomolecules prior to conjugation, as well as the degree of conjugation in real-time during the linking process; a simple UV scan ensures reproducibility of your reactions
  • Rapid conjugation — each kit contains TurboLINK™ catalyst to accelerate the conjugation of HyNic- and 4FB-modified biomolecules at least 10-fold

SoluLINK technology, combined with TurboLINK catalyst and purification reagents, allows rapid and quantitative conjugation of your biomolecules, even at dilute concentrations. x

SoluLINK linkers are available as a flexible stand-alone option. The amine-reactive NHS ester and thiol-reactive maleimide versions of HyNic, 4FB, biotin, and digoxigenin are available to meet your conjugation needs.

  • Eliminate the guesswork surrounding bioconjugation — there is no need to run simultaneous, indirect positive control reactions
  • Simplify quantification and quality control — SoluLINK is the only conjugation technology that can be quantified with a simple, non-destructive spectrophotometer reading that helps determine the number of linkers incorporated per biomolecule and the extent of conjugation between two biomolecules
  • Maximize efficiency — the high-efficiency conjugation reaction with TurboLINK catalyst consumes all starting material using just a slight mole excess of one of the reactants

SoluLINK conjugation technology powers the applications of numerous industry-leading biotechnology companies. For convenience, these linkers are available in pre-weighed aliquots, as well as in bulk and custom sizes for scale-up. Our products are manufactured under the TriLink comprehensive ISO 9001:2015 standard quality system to ensure a consistent supply of high-quality product.

SoluLINK bioconjugation linkers and reagents are available as stand-alone products for scale-up manufacturing. Additional accessories are also available in convenient pack sizes. 

Don't waste valuable time and money ordering large quantities of reagents from multiple vendors or making buffers from scratch. With our convenient pack sizes, you won't need to buy more reagents or accessories than you need.

ChromaLINK Biotin and Digoxigenin contain a UV-traceable chromophore to enable reproducible biotinylation and digoxigenylation of proteins and nucleic acids.

The ChromaLINK chromophore allows you to quantify incorporation with a simple and direct UV scan requiring minutes, not hours. Label quantification does not require the standard curves required for HABA/avidin and fluoro-reporter assays. ChromaLINK Biotin and Digoxigenin also contain a PEG3 spacer to improve solubility and decrease the steric hindrance and aggregation of proteins observed with conventional reagents.

ChromaLINK labeling reagents are available in an amine-reactive NHS ester, and ChromaLINK Biotin is also available as a thiol-reactive maleimide.

Use SoluLINK streptavidin-coupled NanoLINK and MagnaLINK magnetic beads to immobilize biotinylated samples for efficient separations. These beads boast the highest biotin binding capacity of any bead on the market, which means you can see better signals and less non-specific binding from smaller volumes of beads when compared to competing products.

SoluLINK magnetic beads are regularly cited in papers for diverse manual and automated separation procedures.