Angiotensin II is converted from angiotensin I by the enzyme angiotensin-converting enzyme (ACE), primarily through ACE within the lung. Angiotensin II acts as an endocrine, autocrine/paracrine, and intracrine hormone. Angiotensin II is degraded to angiotensin III by angiotensinases located in red blood cells and the vascular beds of most tissues. Angiotensin II increases blood pressure by stimulating the Gq protein in vascular smooth muscle cells (which in turn activates an IP3-dependent mechanism leading to a rise in intracellular calcium levels and ultimately causing contraction). In addition, angiotensin II acts at the Na/H exchanger in the proximal tubules of the kidney to stimulate Na reabsorption and H excretion which is coupled to bicarbonate reabsorption. This ultimately results in an increase in blood volume, pressure, and pH.Sample Type:Serum and plasmaIntended Use:The kit is a competitive enzyme immunoassay for the in vitro quantitative measurement of Angiotensin II in rat serum, plasma; and other biological fluids not being tested.Sensitivity:6pg/mlRange:0.49-2000pg/mlSpecificity:This assay has high sensitivity and excellent specificity for detection of rat Angiotensin II.Precision:Intra CV<10%; Inter CV <15%Test Principle:The immunoplate in this kit is pre-coated with secondary antibody and the nonspecific binding sites are blocked. The secondary antibody can bind to the Fc fragment of the Angiotensin II antibody whose Fab fragment will be competitively bound by both biotinylated Angiotensin II peptide and peptide standard or targeted peptide in samples. The biotinylated Angiotensin II peptide interacts with streptavidin-horseradish peroxidase (SA-HRP) which catalyzes TMB substrate solution. The intensity of the yellow is directly proportional to the amount of biotinylated Angiotensin II peptide SA-HRP complex but inversely proportional to the amount of the peptide in standard solutions or samples. A standard curve of known Angiotensin II concentration can be established accordingly. The unknown Angiotensin II concentration in samples can be determined by extrapolation to this standard curve.Kit Components:Assay plate (12x8 coated Microwells)-1Primary antibody-2x6uLStandard peptide-2x10uLBiotinylated peptide-2x10uLHRP-Streptavidin concentrate-1x60uLAssay diluent (5x concentrate)-1x15mLWash buffer (20x concentrate)-1x25mLTMB substrate-1x12mLStop solution-1x8mLAdhensive strip-2Instruction manual-1.Storage and Stability:Store powder at 4°C liquid at -20°C. Store other components at 4°C. Stable for at least 6 months For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
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保存建议
建议收到Angiotensin II, Competitive BioAssay ELISA Kit (Rat)产品后将其置于4°C/-20°C保存。