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:
![Western Blot: Human Brain Whole Tissue Lysate (Adult Normal) [NB820-59177] - Beta Actin expression on human brain whole tissue lysate using anti-Beta Actin antibody (Cat. # NBP1-47423). Image from verified customer review.](http://images.novusbio.com/fullsize/Human-Brain-Whole-Tissue-Lysate-Adult-Normal-Western-Blot-NB820-59177-img0001.jpg "Western Blot: Human Brain Whole Tissue Lysate (Adult Normal) [NB820-59177] - Beta Actin expression on human brain whole tissue lysate using anti-Beta Actin antibody (Cat. # NBP1-47423). Image from verified customer review.")
![Western Blot: ROBO1 Knockout A549 Cell Lysate [NBP3-18631] - Lane 1: Opal Prestained MW Marker. Lane 2: A549 ROBO KO Clone 5. Lane 3: A549 ROBO KO Clone 15. Lane 4: A549 ROBO KO Clone 17. Lane 5: A549 ROBO KO Clone 18. Lane 6: A549 ROBO KO Clone 21. Lane 7: A549 ROBO1 KO Bulk. Lane 8: A549 WCL Parental. Lane 9: MCF-7 WCL. Load: 35ug lysate/lane. Primary Antibody [Blot A] Anti-ROBO1 ~181kDa; [Blot B] stripped and re-probed with Anti-Tubulin ~50kDa; at 1ug/mL overnight at 2-8C. Secondary Antibody: Goat Anti-Rabbit IgG HRP at 1:70,000 for 30min at RT. Block: TTBS/Casein at RT. No detection of expected band at ~181kDa is observed in ROBO1 knockout A549 when compared with unmodified A549 cell lysates by Western blot.](http://images.novusbio.com/fullsize/ROBO1-Knockout-A549-Cell-Lysate-Western-Blot-NBP3-18631-img0001.jpg "Western Blot: ROBO1 Knockout A549 Cell Lysate [NBP3-18631] - Lane 1: Opal Prestained MW Marker. Lane 2: A549 ROBO KO Clone 5. Lane 3: A549 ROBO KO Clone 15. Lane 4: A549 ROBO KO Clone 17. Lane 5: A549 ROBO KO Clone 18. Lane 6: A549 ROBO KO Clone 21. Lane 7: A549 ROBO1 KO Bulk. Lane 8: A549 WCL Parental. Lane 9: MCF-7 WCL. Load: 35ug lysate/lane. Primary Antibody [Blot A] Anti-ROBO1 ~181kDa; [Blot B] stripped and re-probed with Anti-Tubulin ~50kDa; at 1ug/mL overnight at 2-8C. Secondary Antibody: Goat Anti-Rabbit IgG HRP at 1:70,000 for 30min at RT. Block: TTBS/Casein at RT. No detection of expected band at ~181kDa is observed in ROBO1 knockout A549 when compared with unmodified A549 cell lysates by Western blot.")
![Western Blot: Mouse Heart Whole Tissue Lysate (Adult Normal) [NB820-59660] - Western blot analysis of GAPDH (NB300-323) using whole normal mouse heart lysate [NB820-59660].](http://images.novusbio.com/fullsize/Mouse-Heart-Whole-Tissue-Lysate-Adult-Normal-Western-Blot-NB820-59660-img0004.jpg "Western Blot: Mouse Heart Whole Tissue Lysate (Adult Normal) [NB820-59660] - Western blot analysis of GAPDH (NB300-323) using whole normal mouse heart lysate [NB820-59660].")
![SDS-Page: Mouse Heart Whole Tissue Lysate (Adult Normal) [NB820-59660] - Ponceau S staining of whole normal mouse heart lysate using NB820-59660.](http://images.novusbio.com/fullsize/Mouse-Heart-Whole-Tissue-Lysate-Adult-Normal-SDS-Page-NB820-59660-img0005.jpg)
![Western Blot: ERK2 Knockout A549 Cell Lysate [NBP3-18632] - Lane 1: Opal Prestained MW Marker Lane 2: A549 WCL Parental. Lane 3: A549 MAPK1 KO Clone 4. Lane 4: A549 MAPK1 KO Clone 10. Lane 5: A549 MAPK1 KO Clone 15. Lane 6: HeLa WCL Parental Load: 10ug lysate/lane. Primary Antibody [Blot A] Anti-MAPK1(ERK2) ~44kDa; [Blot B] stripped and re-probed with Anti-Tubulin ~50kDa; at 1ug/mL overnight at 2-8C. Secondary Antibody: Goat Anti-Rabbit IgG HRP at 1:30,000 for 1hr at RT. Block: BlockOut Buffer for 1hr at RT. No detection of expected band at ~44kDa is observed in MAPK1 (ERK2) knockout A549 when compared with unmodified A549 cell lysates by Western blot.](http://images.novusbio.com/fullsize/ERK2-Knockout-A549-Cell-Lysate-Western-Blot-NBP3-18632-img0001.jpg "Western Blot: ERK2 Knockout A549 Cell Lysate [NBP3-18632] - Lane 1: Opal Prestained MW Marker Lane 2: A549 WCL Parental. Lane 3: A549 MAPK1 KO Clone 4. Lane 4: A549 MAPK1 KO Clone 10. Lane 5: A549 MAPK1 KO Clone 15. Lane 6: HeLa WCL Parental Load: 10ug lysate/lane. Primary Antibody [Blot A] Anti-MAPK1(ERK2) ~44kDa; [Blot B] stripped and re-probed with Anti-Tubulin ~50kDa; at 1ug/mL overnight at 2-8C. Secondary Antibody: Goat Anti-Rabbit IgG HRP at 1:30,000 for 1hr at RT. Block: BlockOut Buffer for 1hr at RT. No detection of expected band at ~44kDa is observed in MAPK1 (ERK2) knockout A549 when compared with unmodified A549 cell lysates by Western blot.")