< 0.5% cross-reactivity observed with available related molecules.< 50% cross-species reactivity observed with species tested.
No significant interference observed with available related molecules.
The Quantikine Human Serpin A12/Vaspin Immunoassay is a 4.5 hour solid-phase ELISA designed to measure human Serpin A12 in cell culture supernates, serum, plasma, saliva, urine, and human milk. It contains NS0-expressed recombinant human Serpin A12 and has been shown to accurately quantitate the recombinant factor. Results obtained using natural human Serpin A12 showed linear curves that were parallel to the standard curves obtained using the Quantikine kit standards. These results indicate that this kit can be used to determine relative mass values for naturally occurring human Serpin A12.
Intra-Assay Precision (Precision within an assay) Three samples of known concentration were tested twenty times on one plate to assess intra-assay precision.
Inter-Assay Precision (Precision between assays) Three samples of known concentration were tested in twenty separate assays to assess inter-assay precision. Assays were performed by at least three technicians using two lots of components.
The recovery of human Serpin A12 spiked to levels throughout the range of the assay in various matrices was evaluated.
Average % Recovery
Cell Culture Media (n=4)
EDTA Plasma (n=4)
Heparin Plasma (n=4)
To assess the linearity of the assay, samples containing and/or spiked with high concentrations of human Serpin A12 were diluted with Calibrator Diluent to produce samples with values within the dynamic range of the assay.
Preparation and Storage
Store the unopened product at 2 - 8 °C. Do not use past expiration date.
Background: Serpin A12
The human serpin superfamily consists of at least 35 members that target not only serine proteases, but also selected cysteine proteases and non-protease proteins. Serpins bind the protease active site resulting in a major conformational rearrangement that traps the enzyme in a covalent acyl-enzyme intermediate. As protease inhibitors, serpins have an array of functions including regulating blood clotting, the complement pathway, extracellular matrix remodeling, and cell motility. They are also involved in activities that extend beyond their ability to inhibit proteases. For instance, they may also regulate blood pressure, angiogenesis, or act as storage/transport proteins.
Entrez Gene IDs
145264 (Human); 68054 (Mouse); 191570 (Rat);
antitrypsin), member 12; member 12; OL-64; OL-64Visceral adipose-specific serpin; serine (or cysteine) proteinase inhibitor, clade A (alpha-1 antiproteinase; serpin A12; serpin peptidase inhibitor, clade A (alpha-1 antiproteinase, antitrypsin); Vaspin; Visceral adipose tissue-derived serine protease inhibitor;