S-4FB Crosslinker (DMF Soluble)

Cat.No.: S-1004-105
Size: 5 x 1.0 mg
Price: $122.00
Cat.No.: S-1004-010
Size: 10 mg
Price: $176.00

The S-4FB (N-succinimidyl-4-formylbenzamide) heterobifunctional crosslinker is fundamental to Solulink's proprietary linker technology. S-4FB reacts with primary amines on proteins (amino group of lysine) or amino-modified oligonucleotides or surfaces, introducing a 4FB (4-formylbenzamide) linker that forms stable covalent conjugates with biomolecules possessing HyNic (6-hydrazinonicotinamide) incorporated linkers. 4FB groups incorporated on biomolecules and surfaces are extremely stable and have been known to maintain their reactivity for >18 months.


Solulink's proprietary linker technology is based on the use of two complementary heterobifunctional linkers:  

  • S-HyNic crosslinker is conjugated to biomolecule 1 through primary amines on proteins, oligos, peptides, or surfaces.
  • S-4FB (succinimidyl-4-formylbenzamide) linker is conjugated to biomolecule 2 through primary amines on proteins, oligos, peptides, carbohydrates, or surfaces.
  • HyNic-modified biomolecule 1 is incubated with 4FB-modified biomolecule 2 to form a conjugate.

The result is two biomolecules conjugated through a UV-traceable and stable bond (bis-arylhydrazone) with measurable absorbance at 354 nm. Thus any two proteins, regardless of molecular weight, can be efficiently conjugated.

Solulink Advantages

  • Catalyzed Conjugation – Faster kinetics for greater efficiency and yields
  • Quantifiable – Conjugate bond is UV-traceable for simple and direct quantification
  • Stability – 10 times more stable than any other conjugation linker
  • Specificity – Two-linker method avoids homoconjugate formation
  • Efficient – >80% efficient linker-biomolecule conjugations
  • Robust - The conjugate bond is stable to 92˚C and to pH values ranging from pH 2.0–10.0


Additional Information


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