Competitive ELISA Kits

In a competitive format assay, as antigen concentration in a sample increases, signal intensity decreases.The central concept behind a competitive ELISA is that a larger quantity of analyte in a sample results in fewer free antibodies in solution and by extension a smaller number of labeled antibodies bound to the standard on the plate.

A primary antibody (unlabeled) is incubated with sample antigen. They are then added to 96-well plates which are pre-coated with the same antigen, followed by a washing step. Antigen quantity in the sample determines the amount antibody binding on the well. The secondary antibody that is specific to the primary antibody and conjugated with an enzyme is added. A substrate is added, and remaining enzymes elicit a chromogenic or fluorescent signal. The competitive assay is an appealing option if no suitable antibody pair can be identified for sandwich ELISA, or if the analyte in question is too small to permit binding of both a capture and detection antibody. Our support team will gladly help you with finding the right ELISA kit for your needs. Please contact us via phone, email or use our live chat system.All ELISA Kits

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32,357 Products
Pre-coated, Quantitative, Colorimetric, Samples: Plasma, Serum
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ReactivityMouse (Murine)
Detection Range49.4 pg/mL - 4000 pg/mL
Order details Cat. No. ABIN415519
$682.11
Plus shipping costs $45.00
Delivery in 13 to 16 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Serum, Urine
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ReactivityHuman
Detection Range0.025-10 μg/mL
Order details Cat. No. ABIN365026
» Show selected B2M ELISA Kits with more information such as references or interaction partners.
$633.11
Plus shipping costs $45.00
Delivery in 13 to 16 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Serum, Plasma, Saliva, Cell Culture Supernatant, Tissue Homogenate
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ReactivityHuman
Detection Range0.312-20 ng/mL
Order details Cat. No. ABIN1690717
$666.11
Plus shipping costs $45.00
Delivery in 13 to 16 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Plasma, Serum
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ReactivityChemical
Detection Range1.563-100 μg/mL
Order details Cat. No. ABIN1884657
$544.50
96 tests
Plus shipping costs $45.00
Delivery in 12 to 14 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Urine
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ReactivityMouse (Murine), Rat (Rattus)
Order details Cat. No. ABIN1721161
$605.00
96 tests
Plus shipping costs $45.00
Delivery in 1 to 2 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Cell Culture Supernatant, Plasma, Serum, Tissue Homogenate
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ReactivityHuman
Detection Range1.56 ng/mL - 100 ng/mL
Order details Cat. No. ABIN510001
$707.14
96 tests
Plus shipping costs $45.00
Delivery in 15 to 18 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Plant Tissue
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ReactivityPlant
Detection Range0.156-10 μg/mL
Order details Cat. No. ABIN368385
$543.89
Plus shipping costs $45.00
Delivery in 13 to 16 Business Days
Uncoated, Quantitative, Colorimetric, Samples: Urine, Plasma, Cell Samples, Serum, Tissue Samples
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ReactivityOthers
Order details Cat. No. ABIN2344960
$847.00
Plus shipping costs $45.00
Delivery in 2 to 3 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Urine, Cell Lysate, Plasma, Sample Matrices
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ReactivityAll Species
Detection Range0.94-60 ng/mL
Order details Cat. No. ABIN2964843
$509.93
Plus shipping costs $45.00
Delivery in 3 to 4 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Urine
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ReactivityHuman
Detection Range0.5-200 ng/mL
Order details Cat. No. ABIN1020374
$849.36
96 tests
Plus shipping costs $45.00
Delivery in 9 to 11 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Plasma, Serum
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ReactivityHuman
Detection Range7.813-500 pg/mL
Order details Cat. No. ABIN1117772
» Show selected Vip ELISA Kits with more information such as references or interaction partners.
$630.00
96 tests
Plus shipping costs $45.00
Delivery in 12 to 14 Business Days
Uncoated, Quantitative, Colorimetric, Samples: Plasma, Serum
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ReactivityOthers
Order details Cat. No. ABIN2344951
$693.00
Plus shipping costs $45.00
Delivery in 2 to 3 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Plasma, Serum
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ReactivityChemical
Order details Cat. No. ABIN2344944
$693.00
Plus shipping costs $45.00
Delivery in 2 to 3 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Plasma
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ReactivityHuman
Order details Cat. No. ABIN612677
$374.00
96 tests
Plus shipping costs $45.00
Delivery in 2 to 3 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Cell Culture Supernatant, Cell Lysate, Plasma, Serum, Tissue Homogenate
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ReactivityAll Species
Detection Range12.35 pg/mL - 1000 pg/mL
Order details Cat. No. ABIN415564
$418.95
Plus shipping costs $45.00
Delivery in 13 to 16 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Cell Culture Supernatant, Serum
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ReactivityHuman, Mouse (Murine), Rat (Rattus)
Detection Range0.1-1.000 pg/mL
Order details Cat. No. ABIN1979095
» Show selected NPPB ELISA Kits with more information such as references or interaction partners.
$456.50
Plus shipping costs $45.00
Delivery in 2 to 3 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Plasma, Serum
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ReactivityAll Species
Detection Range2.47 pg/mL - 200 pg/mL
Order details Cat. No. ABIN1118027
$837.89
Plus shipping costs $45.00
Delivery in 13 to 16 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Plasma, Serum
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ReactivityAll Species
Detection Range24.69 ng/mL - 2000 ng/mL
Order details Cat. No. ABIN1118031
$837.89
Plus shipping costs $45.00
Delivery in 13 to 16 Business Days
Uncoated, Quantitative, Colorimetric, Samples: Cell Samples, Tissue Samples, Urine
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ReactivityBacteria
Order details Cat. No. ABIN2345044
$533.50
Plus shipping costs $45.00
Delivery in 2 to 3 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Cell Culture Lysate, Serum, Urine
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ReactivityChemical
Detection Range0.125-10 ng/mL
Order details Cat. No. ABIN1020373
Pubmed
$849.36
96 tests
Plus shipping costs $45.00
Delivery in 9 to 11 Business Days
Uncoated, Quantitative, Colorimetric, Samples: Cell Samples, Plasma, Serum, Tissue Samples
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ReactivityChemical
Order details Cat. No. ABIN5067552
$577.50
96 tests
Plus shipping costs $45.00
Delivery in 2 to 3 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Plasma
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ReactivityMouse (Murine)
Detection Range6.17 ng/mL - 500 ng/mL
Order details Cat. No. ABIN415741
$606.32
Plus shipping costs $45.00
Delivery in 13 to 16 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Plasma, Serum
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ReactivityChemical
Detection Range15.625-1000 pg/mL
Order details Cat. No. ABIN1564089
$616.00
96 tests
Plus shipping costs $45.00
Delivery in 12 to 14 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Plasma, Serum
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ReactivityHuman
Detection Range123.5 pg/mL - 10000 pg/mL
Order details Cat. No. ABIN414763
$663.16
Plus shipping costs $45.00
Delivery in 13 to 16 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Cell Culture Supernatant, Cell Lysate, Plasma, Serum, Tissue Homogenate
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ReactivityHuman
Detection Range185.2 pg/mL - 15000 pg/mL
Order details Cat. No. ABIN414951
» Show selected AMH ELISA Kits with more information such as references or interaction partners.
$663.16
Plus shipping costs $45.00
Delivery in 13 to 16 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Plasma, Serum
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ReactivityHuman
Detection Range617.3 pg/mL - 50000 pg/mL
Order details Cat. No. ABIN415167
» Show selected KLK10 ELISA Kits with more information such as references or interaction partners.
$663.16
Plus shipping costs $45.00
Delivery in 13 to 16 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Cell Culture Supernatant, Cell Lysate, Plasma, Serum, Tissue Homogenate
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ReactivityHuman
Detection Range2.47 ng/mL - 200 ng/mL
Order details Cat. No. ABIN4947961
$663.16
96 tests
Plus shipping costs $45.00
Delivery in 13 to 16 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Cell Culture Supernatant, Cell Lysate, Plasma, Serum, Tissue Homogenate
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ReactivityHuman
Detection Range6.17 pg/mL - 500 pg/mL
Order details Cat. No. ABIN414396
» Show selected Vip ELISA Kits with more information such as references or interaction partners.
$663.16
Plus shipping costs $45.00
Delivery in 13 to 16 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Cell Culture Supernatant, Cell Lysate, Plasma, Serum, Tissue Homogenate
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ReactivityMouse (Murine)
Detection Range123.5 pg/mL - 10000 pg/mL
Order details Cat. No. ABIN415492
$682.11
Plus shipping costs $45.00
Delivery in 13 to 16 Business Days
Pre-coated, Quantitative, Colorimetric, Samples: Plasma, Serum
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ReactivityMouse (Murine)
Detection Range370.4 pg/mL - 30000 pg/mL
Order details Cat. No. ABIN415551
$682.11
Plus shipping costs $45.00
Delivery in 13 to 16 Business Days