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Thermo Scientific™ Imject™ Maleimide-Activated mcKLH and Kit

Perform hapten-carrier conjugation with cysteine-containing peptides and other thiolated antigens with this sulfhydryl-reactive mariculture KLH.

Manufacturer: thermo scientific™  77606

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Catalog No. PI77606


Description & Specifications


Description Imject Maleimide Activated Mariculture KLH
Formulation Activated protein lyophilized in 10mM sodium phosphate, 150mM sodium chloride, 10mM EDTA, 50mM sucrose, pH 7.2
Quantity 2mg
Sufficient For 1 conjugation reaction with up to 2mg sulfhydryl-containing peptide
Activation Maleimide
Format Lyophilized
Protein KLH, keyhole limpet hemocyanin
Item Description Activated mcKLH; 2mg

Thermo Scientific™ Imject Maleimide-Activated mcKLH is sulfhydryl-reactive immunogenic mariculture keyhole limpet hemocyanin (KLH) for hapten-carrier conjugation with cysteine-containing peptides and other thiolated antigens.

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.


  • Convenient packages – choose stabilized, lyophilized Maleimide-Activated mcKLH or a complete immunogen conjugation kit

  • 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 (0.5 to 13 million daltons; aggregates of 350 and 390kDa subunits) and elicits a stronger immune response than BSA or ovalbumin

  • Excellent solubility – our preparations of mariculture KLH are more soluble than typical forms and we also offer a PEGylated form for even greater hydrophilicity and solubility


Kit contains stabilized, lyophilized Maleimide-Activated mcKLH (in PBS with stabilizer), buffers and desalting columns to easily prepare ready-to-use immunogens for immunization