Human NGAL ELISA Assay


The Human NGAL ELISA Assay Kit highly sensitive two-site enzyme linked immunoassay (ELISA) for measuring Lipocalin-2/NGAL in biological samples of humans.

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Human NGAL ELISA Assay

The Human NGAL ELISA Assay is For Research Use Only

Size: 1×96 wells
Sensitivity: 0.177 ng/ml
Dynamic Range: 0.625 ng/ml – 20 ng/ml
Incubation Time: 70 minutes
Sample Type: Plasma, Serum, Urine
Sample Size: 100 μL
Alternative Name: Lipocalin-2

Assay Principle

The principle of the double antibody sandwich ELISA is represented in Figure 1. In this assay the Lipocalin-2/NGAL present in samples reacts with the anti-Lipocalin-2/NGAL antibodies which have been adsorbed to the surface of polystyrene microtitre wells. After the removal of unbound proteins by washing, anti-Lipocalin-2/NGAL antibodies conjugated with horseradish peroxidase (HRP), are added. These enzyme-labeled antibodies form complexes with the previously bound Lipocalin-2/NGAL. Following another washing step, the enzyme bound to the immunosorbent is assayed by the addition of a chromogenic substrate, 3,3’,5,5’-tetramethylbenzidine (TMB). The quantity of bound enzyme varies directly with the concentration of Lipocalin-2/NGAL in the sample tested; thus, the absorbance, at 450 nm, is a measure of the concentration of Lipocalin-2/NGAL in the test sample. The quantity of Lipocalin-2/NGAL in the test sample can be interpolated from the standard curve constructed from the standards, and corrected for sample dilution.

Blood should be collected by venipuncture. The serum should be separated from the cells after clot formation by centrifugation. For plasma samples, blood should be collected into a container with an anticoagulant and then centrifuged. Care should be taken to minimize hemolysis, excessive hemolysis can impact your results. Assay immediately or aliquot and store samples at -20°C. Avoid repeated freeze thaw cycles.

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Additional Information

Typical Standard Curve

Human NGAL ELISA Assay


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