Endostatin (ES) BioAssay(TM) ELISA Kit (Rat)

Produktübersicht

• Artikelname: Endostatin (ES) BioAssay(TM) ELISA Kit (Rat)
• Artikelnummer: USB-353399
• Hersteller Artikelnummer: 353399
• Alternativnummer: USB-353399-96
• Hersteller: US Biological
• Kategorie: Kits/Assays

Produktbeschreibung

The Rat Endostatin (ES) ELISA Kit is a competitive inhibition immunoassay for the in vitro quantitative measurement of ES in serum, plasma, tissue homogenates, cell lysates, cell culture supernatants and other biological fluids. Detection Range: 1.23 - 100ng/ml Sensitivity: <0.54ng/ml Precision: Intra-Assay: CV<10% Inter-Assay: CV<12% Test Principle: This assay employs the competitive inhibition enzyme immunoassay technique. A monoclonal antibody specific for ES has been pre-coated onto a microplate. A competitive inhibition reaction occurs between biotin-labeled ES and unlabeled ES (standards or samples) for limited binding sites on the pre-coated antibody. After incubation the unbound conjugate is washed off. Next, avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. The amount of bound HRP conjugate is inversely proportional to the concentration of ES in the sample. After addition of the substrate solution, the intensity of color developed is inversely proportional to the concentration of ES in the sample. Kit Components: *353399A: Microtiter Plate, 96 wells, Pre-coated, ready to use. *353399B: Standard, 2x1vial 353399C: Standard Diluent, 1x20ml *353399D: Detection Reagent A, 1x120ul *353399E: Detection Reagent B, 1x120ul 353399F: Assay Diluent A, 1x12ml 353399G: Assay Diluent B, 1x12ml 353399H: TMB Substrate, 1x9ml 353399K: Stop Solution, 1x6ml 353399L: Wash Buffer, 30X, 1x20ml Precaution: The Stop Solution (353399K) suggested for use with this kit is an acid solution. Wear eye, hand, face, and clothing protection when using this material. Storage and Stability: Store *353399A, *353399B, *353399D and *353399E at -20C. Store all the other components at 4C. Unused kit is stable for 6 months. Once kit components are opened, it is highly recommended to use remaining reagents within 1 month provided this is within the expiration date of the kit. For maximum recovery of product, centrifuge the original vials after thawing and prior to removing the cap. Materials Required But Not Supplied: 1. Microplate reader with 450 10nm filter. 2. Precision single or multi-channel pipettes and disposable tips. 3. Eppendorf Tubes for diluting samples. 4. Deionized or distilled water. 5. Absorbent paper for blotting the microtiter plate. 6. Container for Wash Solution Sample Preparation and Storage: Serum: Allow samples to clot for two hours at room temperature or overnight at 4C before centrifugation for 20 minutes at approximately 1000xg. Assay freshly prepared serum immediately or store samples in aliquots at -20C or -80C for later use. Avoid repeated freeze/thaw cycles. Plasma: Collect plasma using EDTA or heparin as anticoagulant. Centrifuge samples for 15 minutes at 1000xg at 2-8 within 30 minutes of collection. Remove plasma and assay immediately or store samples in aliquots at -20C or -80C for later use. Avoid repeated freeze/thaw cycles. Tissue Homogenates: The preparation of tissue homogenates will vary depending upon tissue type. For this assay, tissues were rinsed thoroughly in ice-cold PBS (0.02M pH 7.0-7.2) to remove excess blood and weighed before homogenization. The tissues were minced to small pieces and homogenized in 5-10ml of PBS with a glass homogenizer on ice (Micro Tissue Grinders works too). The resulting suspension was sonicated with an ultrasonic cell disrupter or subjected to two freeze-thaw cycles to further break the cell membranes. After that, the homogenates were centrifuged for 5 minutes at 5000*g. The supernatant was removed and assayed immediately or aliquoted and stored at -20C or lower. Cell Lysates: Cells must be lysed before assaying according to the following directions. 1. Adherent cells should be detached with trypsin and then collected by centrifugation (suspension cells can be collected by centrifugation directly). 2. Wash cells three times in cold PBS. 3. Resuspend cells in PBS (1*) and subject the cells to ultrasonication 4X (or freeze cells at