Enzyme-linked immunosorbent assay (ELISA) is an analytic biochemical assay that utilizes enzyme-linked antibodies on a microwell platform to quantitate specific proteins within biological samples. Visual detection is then achieved by adding the enzyme’s substrate, which causes a color-changing reaction to occur. There are three different types of ELISA that are most commonly used: indirect ELISA, sandwich ELISA and competitive ELISA. These assays are extremely useful for high-throughput diagnostic screenings drug testing.
Novus offers a range of support options for ELISA when you buy a product to help you with your ELISA experiment including:
![Glutamate Assay Kit (Colorimetric) [KA1670] - The standard curve is for the purpose of illustration only and should not be used to calculate unknowns. A standard curve should be generated each time the assay is performed.](http://images.novusbio.com/fullsize/Glutamate-Assay-Kit-Colorimetric-KA1670-img0001.jpg "Glutamate Assay Kit (Colorimetric) [KA1670] - The standard curve is for the purpose of illustration only and should not be used to calculate unknowns. A standard curve should be generated each time the assay is performed.")
![ELISA: Creatinine Assay Kit (Colorimetric) [NBP3-07134] - Standard curve for Creatinine using NBP3-07134.](http://images.novusbio.com/fullsize/Creatinine-Assay-Kit-Colorimetric-ELISA-NBP3-07134-img0001.jpg "ELISA: Creatinine Assay Kit (Colorimetric) [NBP3-07134] - Standard curve for Creatinine using NBP3-07134.")
![Creatinine Assay Kit (Colorimetric) [NBP3-07134] - Typical Standard Curve for the Creatinine Detection Kit - NBP3-07134. Assay Type: Quantitative. Detection Method: Colorimetric Assay. Assay Range: 0.3125- 20 mg/dl.](http://images.novusbio.com/fullsize/Creatinine-Assay-Kit-Colorimetric-Product-Image-NBP3-07134-img0002.jpg)
![Creatinine Assay Kit (Colorimetric) [NBP3-07134] - Conversion of creatine and p-creatine to creatinine. Creatine and p-creatine are converted non-enzymatically to the metabolite creatinine, which diffuses into the blood and is excreted by the kidneys. In vivo, this conversion appears to be irreversible and in vitro it is favored by higher temperatures and lower pH. Creatinine forms spontaneously from p-creatine.](http://images.novusbio.com/fullsize/Creatinine-Assay-Kit-Colorimetric-Product-Image-NBP3-07134-img0003.jpg)
![Aspartate Transaminase Assay Kit (Colorimetric) [KA1625] - Purified AST enzyme (assayed at 37 degrees C).](http://images.novusbio.com/fullsize/Aspartate-Transaminase-Assay-Kit-Colorimetric-KA1625-img0001.jpg "Aspartate Transaminase Assay Kit (Colorimetric) [KA1625] - Purified AST enzyme (assayed at 37 degrees C).")