Glyoxal 4BCL Magnetic – Catalog #B2025447

Glyoxal 4BCL Magnetic (Catalog #B2025447) is a pre-activated magnetic agarose resin designed for rapid, covalent immobilization of ligands via glyoxal-lysine coupling. The resin consists of a 6% crosslinked agarose backbone with reactive glyoxal (1,2-dicarbonaldehyde) groups, combined with magnetic iron oxide particles for easy manipulation using external magnets or magnetic separation equipment. This combination of rapid coupling chemistry and magnetic separation makes it ideal for high-throughput affinity chromatography, enzyme immobilization, and antibody or protein ligand coupling.

Scientific Overview

Glyoxal (1,2-dicarbonaldehyde) is a two-carbon dialdehyde that reacts rapidly and specifically with primary amines (lysine, histidine, and free N-terminal amino groups) to form stable Schiff bases, which can be further reduced to secondary amines for permanent coupling. Glyoxal coupling is generally milder than glutaraldehyde, with minimal loss of protein function, and has been extensively used for enzyme immobilization and affinity chromatography.

The 4BCL designation indicates a 4% crosslinked agarose backbone, providing good flow rates while maintaining mechanical stability. The addition of magnetic particles allows rapid separation of the resin from solution using a magnetic field, dramatically reducing processing time compared to gravity flow or centrifugation.

Key applications include:

• One-step immobilization of enzymes, antibodies, and proteins
• Affinity chromatography resins for capture and purification
• Ligand coupling for screening and binding studies
• Rapid magnetic separation for high-throughput workflows

Usage & Handling Guidance

Store at 2–8°C. Before use, inspect the resin visually to ensure magnetic particles are uniformly distributed. During coupling reactions, keep the resin in suspension with gentle stirring to maintain uniform contact with the ligand.

• Coupling protocol: Incubate your protein ligand with the resin at pH 7.0–7.5 and room temperature for 2–4 hours (or overnight) in appropriate buffer. Exact conditions depend on the protein and should be optimized for your specific ligand.
• Reduction: For permanent coupling, reduce Schiff bases with sodium borohydride or sodium cyanoborohydride after the coupling reaction.
• Washing: Wash the coupled resin thoroughly with coupling buffer, then with wash buffer, to remove unreacted ligand and chemical reagents.
• Magnetic separation: Place the resin in a magnetic stand; particles will collect at the tube wall in 1–2 minutes, allowing supernatant to be removed by pipetting.

What You Get

• 2 mL of pre-activated magnetic glyoxal-agarose resin
• 6% crosslinked agarose matrix for mechanical stability
• Reactive glyoxal groups ready for immediate protein coupling
• Magnetic properties for rapid separation and high-throughput workflows
• For research use only (RUO)

Why Researchers Choose It

• One-step coupling chemistry with minimal protein damage
• Magnetic separation eliminates tedious gravity flow or centrifugation
• High binding capacity and excellent flow characteristics
• Suitable for routine batch coupling and high-throughput automation

Frequently Asked Questions (FAQ)

• What is the difference between glyoxal and glutaraldehyde coupling?
  Glyoxal is generally milder and can result in less loss of protein function, though both form stable covalent bonds. Choose based on your protein stability and desired coupling efficiency.
• Do I need to reduce the Schiff base after coupling?
  For permanent bonds, yes: use sodium borohydride or sodium cyanoborohydride. Unreduced Schiff bases are reversible and may dissociate under certain conditions.
• Can I use this resin in a column format?
  Yes. Although the magnetic property is designed for magnetic separation, you can also pack this resin in a gravity flow column and use standard chromatography techniques.
• How do I optimize coupling conditions for my protein?
  Test different pH (typically 7.0–7.5), temperature (4°C or room temperature), and incubation times (2–18 hours). A small test batch before large-scale coupling is recommended.
• Can I get a COA or TDS?
  Yes. Request a quote or contact us and we will provide available lot documentation.

References

• Barbosa O, Torres R, Ortiz C, Berenguer-Murcia A, Rodrigues RC, Fernandez-Lafuente R. Heterofunctional supports in enzyme immobilization: from traditional immobilization protocols to opportunities in tuning enzyme properties. Biomacromolecules. 2013;14(8):2433-62.
• Narayanan SR, Kakodkar SV, Crane LJ. "Glutaraldehyde-P", a stable, reactive aldehyde matrix for affinity chromatography. Anal Biochem. 1990;188(2):278-84.
• Suh CW, Choi GS, Lee EK. Enzymic cleavage of fusion protein using immobilized urokinase covalently conjugated to glyoxyl-agarose. Biotechnol Appl Biochem. 2003;37(Pt 2):149-55.