Human Pro-Cathepsin B ELISA Kit PicoKine®

Store at 4°C for 6 months, at -20°C for 12 months. Avoid multiple freeze-thaw cycles (Ships with gel ice, can store for up to 3 days in room temperature. Freeze upon receiving.)

cathepsin B

Cathepsin B is an enzymatic protein belonging to the peptidase or protease families. In humans, it is coded by the CTSB gene.1, 2 And this gene is mapped to chromosome 8p22.3 The protein encoded by this gene is a lysosomal cysteine proteinase composed of a dimer of disulfide-linked heavy and light chains, both produced from a single protein precursor. It is a member of the peptidase C1 family. Cathepsin B was once suspected as a candidate protease participating in the conversion of beta-amyloid precursor protein into the amyloid plaques found in Alzheimer's disease patients. However, this function is now known to be mediated by BACE1 protease. It is now thought that cathepsin B can degrade beta-amyloid precursor protein into harmless fragments. Thus, it is conceivable cathepsin B may play a pivotal role in the natural defense against Alzheimer's disease.4 Overexpression of cathepsin B has been associated with esophageal adenocarcinoma and other tumors. At least five transcript variants encoding the same protein have been found for this gene. The standard product used in this kit is recombinant human Cathepsin B with the molecular mass of 37KDa.

Cathepsin B

cell culture supernatants, serum, plasma (heparin), saliva and urine

Intra-Assay Precision | Inter-Assay Precision
Sample | 1 | 2 | 3 | 1 | 2 | 3
n | 16 | 16 | 16 | 24 | 24 | 24
Mean(pg/ml) | 225 | 1024 | 1858 | 247 | 1103 | 1963
Standard deviation | 13.28 | 53.25 | 91.04 | 17.54 | 59.56 | 133.48
CV(%) | 5.9% | 5.2% | 4.9% | 7.1% | 5.4% | 6.8%

a monoclonal antibody from mouse|a biotinylated polyclonal antibody from goat

10 ng/tube

Microplate Reader capable of reading absorbance at 450nm.
Incubator.
Automated plate washer (optional).
Pipettes and pipette tips capable of precisely dispensing 0.5 µl through 1 ml volumes of aqueous solutions.
Multichannel pipettes are recommended for large amount of samples.
Deionized or distilled water.
500ml graduated cylinders.
Test tubes for dilution.