Imject™ Maleimide-Activated mcKLH
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Thermo Scientific™

Imject™ Maleimide-Activated mcKLH

Thermo Scientific Imject Maleimide-Activated mcKLH enables conjugation of sulfhydryl-containing peptide haptens to the highly immunogenic keyhole limpet hemocyanin (KLH) carrierRead more
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Catalog NumberDescriptionQuantity
77606Imject Maleimide Activated Mariculture KLH2 mg
77605Imject Maleimide Activated Mariculture KLH10 mg
77610Imject Maleimide Activated Mariculture KLH10 x 10 mg
Catalog number 77606
Price (USD)
133.00
Each
Add to cart
Description:
Imject Maleimide Activated Mariculture KLH
Quantity:
2 mg
Price (USD)
133.00
Each
Add to cart
Thermo Scientific Imject Maleimide-Activated mcKLH enables conjugation of sulfhydryl-containing peptide haptens to the highly immunogenic keyhole limpet hemocyanin (KLH) carrier protein for immunization and antibody production.

Features of Imject Maleimide-Activated mcKLH:

Optimized activation—specifications require that each lot is activated with more than 400 moles of sulhydryl-reactive maleimide per mole of KLH, ensuring consistently high levels of conjugation
Sulfhydryl-reactive—engineered for conjugating cysteine-containing peptide antigens to make effective immunogens for high-titer antibody production
Simple, rapid procedure—complete the hapten-carrier conjugation reaction in two hours to yield sufficient immunogen for several injections and booster immunizations of host animals
High-quality carrier protein—KLH is isolated from the mollusk Megathura crenulata (keyhole limpet); mcKLH is a high-quality form of KLH that is harvested from limpets grown in mariculture
Highly immunogenic—KLH has a high molecular mass (4.5 x 105 to 1.3 x 107 Daltons; aggregates of 350 and 390 kDa subunits) and elicits a stronger immune response than BSA or ovalbumin
Excellent solubility—our preparations of mariculture KLH are more soluble than typical forms

The high-quality mariculture KLH is rendered sulfhydryl-reactive by chemical modification with Sulfo-SMCC crosslinker, and the resulting maleimide-activated protein is then stabilized and lyophilized in phosphate buffer. Maleimide groups form covalent crosslinks with sulfhydryl (-SH) moieties on cysteine residues of peptides and other thiol-containing haptens. Numerous antigen molecules can be conjugated to each KLH molecule to make them highly immunogenic and increase the likelihood of eliciting immunized animals to produce high-titer antisera to the epitopes of interest. Select from among several package sizes of activated KLH protein, or choose the complete conjugation kit that includes optimized buffers and trouble-free spin desalting columns.

Carrier proteins are large, complex molecules capable of stimulating an immune response upon injection. Successful production of antibodies specific to small antigens (i.e., peptides or drug compounds) requires that these haptens be covalently conjugated to a larger, more complex molecule (usually a protein) to make them immunogenic. Carrier proteins are chosen based on immunogenicity, solubility, and whether an adequate level of hapten-carrier conjugation can be achieved.

Keyhole limpet hemocyanin (KLH) is widely used as a carrier protein for conjugation to haptens and other antigens to make them more immunogenic for the purpose of antibody production. Because of its large mass and complexity, KLH elicits a stronger immune response than other carrier proteins. Because the protein is derived from a mollusk, it is phylogenetically distant from mammalian species and less likely to produce antibodies that will cross-react with typical target samples in assays.

More Product Data
Carrier protein activation and conjugation data for immunogen preparation

Related Products
Imject™ Maleimide-Activated mcKLH Spin Kit
Imject™ Maleimide PEGylated mcKLH
Imject™ Maleimide Conjugation Buffer
For Research Use Only. Not for use in diagnostic procedures.
Specifications
DescriptionImject Maleimide Activated Mariculture KLH
Quantity2 mg
Product LineImject™
Unit SizeEach
Contents & Storage
Upon receipt store product at 4°CC. Product is shipped with an ice pack.

Frequently asked questions (FAQs)

What do I need to consider when designing a peptide for antibody production?

We recommend that hydrophobic residues comprise 50% or less of all the residues in your sequence. Make sure there is at least one charged residue for every five amino acids: this is generally known to enhance the solubility of the peptide. Peptides (compared to polypeptides, which fold and bury the hydrophobic amino acids) are too small to fold, so just a few hydrophobic amino acids may leave them insoluble.

Other guidelines include:
Peptides containing multiple Cys, Met, and Trp can be hard to synthesize.
Some sequences are problematic in solid-phase peptide synthesis or cleavage and are best avoided; these include Asp-Pro sequences or stretches of amino acids that require bulky protecting groups on their side chains during synthesis.
Glycine is often good for antigenicity as it has only a hydrogen side chain; this allows for complete rotation.
Please note that we offer a Custom Antibody Production service (https://www.thermofisher.com/us/en/home/life-science/antibodies/custom-antibodies/custom-antibody-production.html) that includes the use of our proprietary Antigen Profiler and Antigen Preparation tool (https://www.thermofisher.com/us/en/home/life-science/antibodies/custom-antibodies/custom-antibody-production/antigen-profiler-antigen-preparation.html).

What is the optimal peptide length for antibody production?

Most peptide antigens range in length from 12 to 16 residues and are relatively easy to synthesize. Peptides of 9 residues or shorter have been effective antigens for antibody production, but peptides longer than 16 amino acids may contain several epitopes and form secondary structures. Peptides in excess of 18 residues begin to present more synthetic challenges. Before you synthesize your peptide, we recommend doing a BLASTP search using your peptide sequence. This is to make sure that the peptide is not homologous or identical to a sequence in a completely unrelated protein in the host animal.

Please note that we offer a Custom Antibody Production service (https://www.thermofisher.com/us/en/home/life-science/antibodies/custom-antibodies/custom-antibody-production.html) that includes the use of our proprietary Antigen Profiler and Antigen Preparation tool (https://www.thermofisher.com/us/en/home/life-science/antibodies/custom-antibodies/custom-antibody-production/antigen-profiler-antigen-preparation.html).

What happens if antibodies are stored improperly?

Improper storage of antibodies can lead to:
- Degradation: Loss of activity and specificity
- Aggregation: Formation of precipitates or clumps
- Reduced performance: Poor results in assays or experiments

Find additional tips, troubleshooting help, and resources within our Antibodies and Immunoassays Support Center.

What do antibody pair kits contain, how many samples can I process, and how can I find a list of antibody pair kits by target?

Antibody pair kits contain capture antibody, detection antibody, recombinant standard and HRP conjugate. Each contains enough reagents to process forty 96-well plates. A list of Antibody Pair Kits (https://www.thermofisher.com/us/en/home/life-science/protein-biology/protein-assays-analysis/elisa/antibody-pair-kits.html) is available by target.

Find additional tips, troubleshooting help, and resources within our Antibodies and Immunoassays Support Center.

What do Reagent Sets contain, how many samples can I process, and how can I check if a Reagent Set is available for my target?

Reagent Sets contain Capture Antibody, Detection Antibody, Recombinant Standard, HRP Conjugate, TMB Substrate and Stop Solution. Each contains enough reagents to process five 96-well plates. Reagent Sets are included in the main list of ELISA (https://www.thermofisher.com/us/en/home/life-science/protein-biology/protein-assays-analysis/elisa/antibody-pair-kits.html) kits (search by “Reagent Set”).

Find additional tips, troubleshooting help, and resources within our Antibodies and Immunoassays Support Center.