KLH Conjugated to Agarose Beads – Catalog #B2025634

KLH Conjugated to Agarose Beads (Catalog #B2025634) combine keyhole limpet hemocyanin (KLH), a large (~400 kDa), highly immunogenic protein, with the practical advantages of agarose affinity matrix. This product is supplied as a 2 mL suspension of beads and is ideal for purifying antibodies specific to KLH-based immunogens or for negative selection in antibody screening workflows.

Scientific Overview

Keyhole limpet hemocyanin (KLH) is an oxygen-carrying metalloprotein from the keyhole limpet (Megathura crenulata) that has been widely used as a carrier protein for immunization. Because of its large size, multiple epitopes, and inherent immunogenicity, KLH conjugated to haptens or peptides is effective for raising high-titer, specific antibodies. Many research antibodies and commercial antibody kits have been developed using KLH conjugates as immunogens.

When researchers generate antibodies against a KLH-conjugated antigen, some of the resulting antibodies recognize the target antigen, but others recognize KLH itself. KLH-conjugated agarose beads provide a simple method to remove or capture anti-KLH antibodies, either to negative-select for antibodies specific to the target hapten or peptide, or to enrich anti-KLH antibodies for analysis.

Key applications include:

• Depletion of anti-KLH antibodies from hybridoma or polyclonal antibody preparations
• Purification of antibodies specific to KLH-conjugated antigens
• Screening of antibody libraries for KLH-binding species
• Immunological research and antibody characterization

Usage & Handling Guidance

Store at 2–8°C. Before use, gently mix the suspension by inversion (do not vortex) and resuspend the beads. Protect from freeze–thaw cycles.

• Batch binding: Add the beads to your antibody solution, incubate for 30 minutes to 1 hour at 4°C or room temperature, then separate by settling or brief centrifugation (1,000 × g for 1 minute).
• Column packing: Alternatively, pack the beads into a column for gravity-flow or low-pressure chromatography applications.
• Buffer compatibility: Use antibody storage buffers (PBS, TBS, or similar); avoid extreme pH values that may destabilize KLH or agarose.

What You Get

• 2 mL of keyhole limpet hemocyanin conjugated to agarose beads, supplied as suspension
• A ready-to-use affinity matrix for antibody screening and purification
• High binding capacity for anti-KLH antibodies
• For research use only (RUO)

Why Researchers Choose It

• KLH is a gold-standard immunogenic carrier widely used in antibody development
• Agarose support is chemically inert, biocompatible, and suitable for repeated use
• Convenient suspension format ready for immediate use in batch or column workflows
• Effective at depleting unwanted anti-KLH reactivity from antibody pools

Frequently Asked Questions (FAQ)

• What is KLH and why is it used as a carrier protein?
  Keyhole limpet hemocyanin is a large (~400 kDa), highly immunogenic oxygen-transport protein. Its size and multiple epitopes make it an excellent carrier for small antigens (haptens and peptides) to enhance immune recognition.
• How do I use KLH beads to deplete anti-KLH antibodies?
  Incubate your antibody solution with the beads for 30 minutes to 1 hour at 4°C or room temperature, then separate the beads by settling or centrifugation. The flow-through or supernatant contains antibodies depleted of anti-KLH reactivity.
• Can I reuse these beads?
  Yes, with care. Gently wash the beads with PBS or your working buffer to remove unbound antibodies, and re-equilibrate before the next use. Repeated freeze–thaw cycles should be avoided.
• What if I need to capture and enrich anti-KLH antibodies instead of depleting them?
  After incubation, elute the antibodies from the beads using a low-pH buffer (e.g., 0.1 M glycine, pH 2.5) or high-salt buffer, depending on the strength of binding you observe.
• Are there any monoclonal or recombinant alternatives to KLH-based products?
  Yes. For some applications, protein G, protein A, or other affinity matrices may offer improved specificity. Contact us to discuss options for your specific experiment.

References

• Harris JR, Markl J. Keyhole limpet hemocyanin (KLH): a biomedical review. Micron. 1999;30(6):597-623.
• Montégut L, Chen H, Bravo-San Pedro JM, Motiño O, Martins I, Kroemer G. Immunization of mice with the self-peptide ACBP coupled to keyhole limpet hemocyanin. STAR Protoc. 2022;3(1):101095.
• Lee BS, Huang JS, Jayathilaka LP, Lee J, Gupta S. Antibody Production with Synthetic Peptides. Methods Mol Biol. 2016;1474:25-47.