ELISA

Enzyme-Linked Immunosorbent Assay (ELISA) is a technique whereby antibodies are used for detecting and quantifying the prescence of a specific protein or antigen. The antibodies used in the technique have been modified such that they are linked with an enzyme that reacts with a particular substrate and results in a change in the colour of that substrate. The technique relies on the formation of an antibody-antigen complex when the protein comes in contact with the antibody within the reagent.