Principle of the Assay: CAPN14 ELISA kit applies the competitive enzyme immunoassay technique utilizing a polyclonal anti-CAPN14 antibody and an CAPN14-HRP conjugate. The assay sample and buffer are incubated together with CAPN14-HRP conjugate in pre-coated plate for one hour. After the incubation period, the wells are decanted and washed five times. The wells are then incubated with a substrate for HRP enzyme. The product of the enzyme-substrate reaction forms a blue colored complex. Finally, a stop solution is added to stop the reaction, which will then turn the solution yellow. The intensity of color is measured spectrophotometrically at 450nm in a microplate reader. The intensity of the color is inversely proportional to the CAPN14 concentration since CAPN14 from samples and CAPN14-HRP conjugate compete for the anti-CAPN14 antibody binding site. Since the number of sites is limited, as more sites are occupied by CAPN14 from the sample, fewer sites are left to bind CAPN14-HRP conjugate. A standard curve is plotted relating the intensity of the color (O.D.) to the concentration of standards. The CAPN14 concentration in each sample is interpolated from this standard curve.
NCBI and Uniprot Product Information
NCBI Description
Calpains are a family of cytosolic calcium-activated cysteine proteases involved in a variety of cellular processes including apoptosis, cell division, modulation of integrin-cytoskeletal interactions, and synaptic plasticity (Dear et al., 2000 [PubMed 10964513]). CAPN14 belongs to the calpain large subunit family.[supplied by OMIM, Mar 2008]
Uniprot Description
CAPN14 iso2: Calcium-regulated non-lysosomal thiol-protease. Belongs to the peptidase C2 family. 2 isoforms of the human protein are produced by alternative splicing.
Protein type: EC 3.4.22.-; Protease
Chromosomal Location of Human Ortholog: 2p23.1-p21
Cellular Component: nucleoplasm; cytoplasm
Molecular Function: calcium-dependent cysteine-type endopeptidase activity; calcium ion binding
Biological Process: proteolysis