Horseradish peroxidase is used for production of peroxidase conjugated antisera. It is a widely used label for immunoglobulins in many different immunochemistry applications including ELISA, immunoblotting, and immunohistochemistry. HRP can be conjugated to antibodies by several different methods including glutaraldehyde, periodate oxidation, through disulfide bonds, and also via amino and thiol directed crosslinkers. HRP is the most desired label for antibodies, since it is the smallest and most stable of the three most popular enzyme labels (HRP, β-galactosidase, and alkaline phosphatase) and its glycosylation leads to lower non-specific binding.
Horseradish peroxidase (HRP) is isolated from horseradish roots and belongs to the ferroprotoporphyrin group of peroxidases. HRP is a single chain polypeptide containing four disulfide bridges. It is a glycoprotein containing 18% carbohydrate. The carbohydrate composition consists of galactose, arabinose, xylose, fucose, mannose, mannosamine, and galactosamine depending upon the specific isozyme.
When incubated with a substrate, horseradish peroxidase produces a coloured, fluorimetric, or luminescent derivative of the labeled molecule, allowing quantification. Horseradish peroxidase has been shown to slightly reduce the level of inhibition in a cydAB mutant. Known inhibitors are sodium azide, cyanide, L-cystine, dichromate, ethylenethiourea, hydroxylamine, sulfide, vanadate, p-aminobenzoic acid, and Cd2+, Co2+, Cu2+, Fe3+, Mn2+, Ni2+, and Pb2+ ions.
Specific Activity: ≥200 units/mg
Suitability: Suitable for production of peroxidase conjugated antisera
Key Applications: Production of peroxidase conjugated antisera , Western blots, ELISA, Immunohistochemistry
Application Areas: Protein Labeling
Product Type: Proteins, Enzymes & Peptides
Protein or Enzyme Type: Other Proteins, Enzymes & Peptides
Extinction Coefficient (E1%): EmM = 100 (403 nm)
Presentation: brown to red brown color, salt-free, freeze-dried powder
Format: Powder
Isoelectric point (pI): Isozymes range from 3.0–9.0
Solubility: Soluble in distilled water or dilute buffer.
Storage & Handling: Best stored at -20°C. Once opened, redesiccate over silica gel under vacuum before returning to -20°C.