Cathepsin B Antibody


Western Blot: Cathepsin B Antibody [NBP1-45456] - Western blot analysis of Cathepsin B with Jurkat cell (Lane 1) and mouse small intestine tissue (Lane 2) lysate.
Flow Cytometry: Cathepsin B Antibody [NBP1-45456] - Analysis of Cathepsin B levels within phagosomes of macrophages

Product Details

Reactivity Hu, Mu, RtSpecies Glossary
Applications WB, Flow, IHC

Order Details

Cathepsin B Antibody Summary

Synthetic peptide surrounding amino acid 322 of human cathepsins B.
Immunogen affinity purified
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  • Western Blot
  • Flow Cytometry
  • Immunohistochemistry
Application Notes
Western blotting (0.5-4 ug/ml) amd in Immunohistochemistry (10-20 ug/ml). However, the optimal conditions should be determined individually. The purified antibody detects both the proform (37-43 kDa) and the mature form (25 kDa) of cathepsin B. It reacts with human and mouse and in a lesser extent with rat samples.

Packaging, Storage & Formulations

Store at -20C. Avoid freeze-thaw cycles.
PBS (pH 7.2), 0.5% BSA and 50% Glycerol
0.01% Thimerosal
Immunogen affinity purified

Alternate Names for Cathepsin B Antibody

  • APP secretase
  • APPS
  • Cathepsin B
  • Cathepsin B1
  • CPSBamyloid precursor protein secretase
  • CTSB
  • cysteine protease
  • EC 3.4.22
  • EC


Cathepsin B is a normal lysosomal proteinase that is expressed in all cells. It is a cysteine endoproteinase structurally and functionally related to the papain family of proteases. Cathepsin B is synthesized as an inactive 43 kDa pro enzyme which, by removal of a 62 amino acid propeptide, is activated to the single chain form of 31 kDa or the two chain form (25 and 5 kDa subunits). Matured Cathepsin B is normally localized in the lysosomes where it functions in protein turnover. Cathepsin B is also shown capable of degrading extracellular matrix proteins at acidic and neutral pH. Endogenous inhibitors of cysteine proteases, the cystatins and stefins, may play a major role in regulating their activity. In tumor cells and in cells exposed to mitogens, cathepsin B displays altered cellular trafficking resulting in the secretion of the 43 kDa precursor. Elevated levels of Cathepsin B correlate with malignancy suggesting that this enzyme may be a useful prognostic marker for several types of human cancers. Cathepsin B has also been implicated in the pathogenesis of rhematoid arthritis, muscular dystrophy and tumor metastasis.


This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

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Secondary Antibodies


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Cathepsin B - a lysosomal protease with potential of an important drug target in neurological diseases and cancer
Cathepsins are a family of lysosomal proteases (serine, aspartic and cysteine proteases) that acts in conjunction with lipases and nucleases to degrade biological macromolecules in the lysosomes (1). While most cathepsins are ubiquitously expressed...  Read full blog post.

Caspase 11: A novel non-canonical inflammasomes
Cell death via apoptosis is a key cellular function triggered by the cell death receptor family and their ligands. This regulated process then transmits downstream signals through adaptor molecules ending with the caspase cysteine proteases. Caspas...  Read full blog post.

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Gene Symbol CTSB