Indirect ELISA uses a two-step detection process where a primary antibody specific for the antigen binds to the target and a labelled secondary antibody against the primary antigen host species binds to the primary antibody to detect the antigen.
Enzyme-linked immunosorbent assay, or ELISA, is a plate-based assay method used to identify and measure soluble compounds like peptides, proteins, antibodies, and hormones. The same technology is also known by different names, such as enzyme immunoassay (EIA). In an ELISA, the target macromolecule (antigen) is immobilised on a solid surface (microplate), where it then forms a complex with an antibody that is connected to a reporter enzyme. The reporter enzyme's activity is measured through incubation with the proper solution to achieve detection.
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